aLIGO LHO Logbook https://alog.ligo-wa.caltech.edu/aLOG/ General logbook for aLIGO activities en-us Wed, 02 Apr 2025 18:15:11 -0700 LHO VE - 2025 April vent - VAC diary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83713 <p>Author: janos.csizmazia@ligo.org</p><p>Report ID: 83713</p>Today&#39;s activities: - HAM1 was vented, the bolts of both the Y+ and Y- doors have been taken off (besides 4 bolts/door, see aLog 83704), in preparation for removing one of the doors tomorrow - After the installation of a faulty gauge on HAM6, today it was replaced with a functional one (same type), leak checked, and found OK. No further pumping on this gauge, it will be valved together with the corner during the pumpdown - Some leak checking was done, in detail: - BSC8: Y- X- side flanges (3 pcs.) - BSC2: Y+ X- side flanges (3 pcs.) - HAM4: X- door flanges (5 pcs.) - HAM5: X- door flanges (5 pcs.); top flanges - and adjacent sub-flanges (3 pcs.); X+ door flanges (5 pcs.) - HAM6: X- door flanges (5 pcs.); top flanges - and adjacent sub-flanges (2 pcs. - the turbo will be replaced later, so no leak check there); Y- door flanges (3 pcs.); X+ door flanges (5 pcs.) - HAM4-HAM5 spool piece: Y- side X- and top flanges (6 pcs.); top flanges (4 pcs.); Y+ side X- and bottom flanges (4 pcs.); vent valve (1 pc.); IP3 and IP4 flanges (2 pcs.). This spool piece is now complete, as other flanges have been leak-tight verified earlier according to aLog 45415 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83713 janos.csizmazia@ligo.org Wed, 02 Apr 2025 18:15:11 -0700 LHO VE H1 CDS - HAM1 Tip Tilts - PMI/RM1/RM2 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83712 <p>Author: filiberto.clara@ligo.org</p><p>Report ID: 83712</p><p>WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12424">12424</a></p> <p>List of work for PMI and RMI1/2:</p> <p>1. Both Sat Amplifier Chassis now installed in SUS-R1<br /> 2. Cables for RM1/2 have been terminated<br /> 3. Cables for PM1 pulled from SUS-C4 to SUS-R1<br /> 4. Cabling from Amplifier chassis for PMI/RM1/RM2 pulled to HAM1 Flange D6</p> <p>Coil drivers need to be relocated in CER to lastest D0902810 drawing.</p> <p>F. Clara, M. Pirello</p> SUS https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83712 filiberto.clara@ligo.org Wed, 02 Apr 2025 17:12:53 -0700 H1 CDS LHO General - OPS Day Shift Summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83709 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83709</p><p><strong>TITLE:</strong> 04/02 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Planned Engineering<br /> <strong>INCOMING OPERATOR:</strong> None<br /> <strong>SHIFT SUMMARY:</strong></p> <p>Extremely productive day in which we finished most of our activities, listed below:</p> <ul> <li>Crane engine hoist to BSC8 (FAC) - <strong>DONE</strong></li> <li>Inspect HAM1 and BSC8 final cleanroom (FAC) - <strong>DONE</strong></li> <li>Turn on HAM1 cleanroom and garb room (FAC) - <strong>DONE</strong></li> <li>Power down ISC chassis that will be recabled (Fil/EE) - <strong>DONE</strong></li> <li>Pull ISC cables - NOT COAX yet and work to relabel (Fil/EE) - <strong>DONE</strong></li> <li>HAM1 Offload HEPI Setup (SEI/Jim/Mitchell)</li> <li>Leak check corner under vac (VAC)</li> <li>Prep for corner vent (VAC)</li> <li>Checklist for HAM1 vent (VAC) - <strong>DONE</strong></li> <li>HAM1 1st cleaning (Kim/Nellie/FAC) - <strong>DONE</strong></li> <li>Clean out recieving for ISI (FAC) - <strong>DONE</strong></li> <li>HAM6 Guage Work (VAC) - <strong>DONE</strong></li> <li>Checklist for corner vent (VAC)</li> <li>Move forklift to HAM1 south bay area (FAC)</li> <li>Crane or move power bang box to southbay for cleanrooms (FAC) - <strong>DONE</strong></li> <li>Replace ~3ft of cleanroom panel for HAM2 +Y-X (FAC) - <strong>DONE</strong></li> <li><strong>Vent HAM1 (VAC) - DONE</strong></li> <li>Start HAM1 bolt/door removal (VAC/Randy/Tony/Corey) - <strong>DONE - <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83704">alog 83704</a></strong></li> <li>Move HAM1 cleanroom into final place (5 people)</li> <li>Stock garb room by HAM3 (FAC/Kim)</li> <li>Prep laydown areas for stack deinstall, setup door pallet at HAM3+Y - <strong>DONE</strong></li> <li>Get dust mons working and trending (OPS/RyanC) - <strong>DONE - <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83706">alog 83706</a>, <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83694">alog 83694</a></strong></li> </ul> <p><strong>Relevant alogs pertaining to today:</strong></p> <ul> <li>HEPI/ISI Pointing after locking: <strong><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83705">alog 83705</a></strong></li> <li>Sush7 timing glitch model restart: <strong><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83698">alog 83698</a></strong></li> <li>High Voltage Shutoff Prep: <strong><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83695">alog 83695</a></strong></li> </ul> <p>Attached is a picture of our SEI/SUS Guardian configurations</p> <p><strong>LOG:</strong></p> <table> <tbody> <tr> <th>Start Time</th> <th>System</th> <th>Name</th> <th>Location</th> <th>Lazer_Haz</th> <th>Task</th> <th>Time End</th> </tr> <tr> <td>14:47</td> <td>FAC</td> <td>Kim</td> <td>Optics Lab</td> <td>N</td> <td>Technical Cleaning</td> <td>15:05</td> </tr> <tr> <td>15:04</td> <td>FAC</td> <td>Tyler</td> <td>LVEA</td> <td>N</td> <td>Engine hoist</td> <td>15:23</td> </tr> <tr> <td>15:48</td> <td>AOS</td> <td>Ryan S, TJ</td> <td>LVEA</td> <td>N</td> <td>Moving ISC Tables</td> <td>15:56</td> </tr> <tr> <td>15:48</td> <td>EE</td> <td>Fil</td> <td>LVEA</td> <td>N</td> <td>Cable work contd.</td> <td>16:48</td> </tr> <tr> <td>15:51</td> <td>VAC</td> <td>Gerardo</td> <td>LVEA</td> <td>N</td> <td>Purge air measurement</td> <td>19:06</td> </tr> <tr> <td>15:54</td> <td>AOS</td> <td>Betsy</td> <td>LVEA</td> <td>N</td> <td>Walkabout</td> <td>16:33</td> </tr> <tr> <td>15:56</td> <td>VAC</td> <td>Jordan, Janos</td> <td>LVEA</td> <td>N</td> <td>Leak checks</td> <td>19:16</td> </tr> <tr> <td>15:59</td> <td>FAC</td> <td>Nellie, Kim</td> <td>LVEA</td> <td>N</td> <td>Technical cleaning</td> <td>19:33</td> </tr> <tr> <td>16:07</td> <td>FAC</td> <td>Chris</td> <td>LVEA</td> <td>N</td> <td>FAMIS tasks</td> <td>17:24</td> </tr> <tr> <td>16:13</td> <td>SEI</td> <td>Jim</td> <td>LVEA</td> <td>N</td> <td>Move L4Cs</td> <td>19:58</td> </tr> <tr> <td>16:20</td> <td>AOS</td> <td>TJ, Camilla</td> <td>Optics Lab</td> <td>N</td> <td>Part search</td> <td>17:00</td> </tr> <tr> <td>16:33</td> <td>FAC</td> <td>Richard</td> <td>LVEA</td> <td>N</td> <td>Looking for trip hazards</td> <td>16:54</td> </tr> <tr> <td>17:26</td> <td>ISC</td> <td>Jennie, Rahul, Mayank, Siva</td> <td>Optics Lab</td> <td>Local</td> <td>ISS Array Work</td> <td>19:33</td> </tr> <tr> <td>18:13</td> <td>FAC</td> <td>Richard</td> <td>LVEA</td> <td>N</td> <td>Walkabout</td> <td>18:23</td> </tr> <tr> <td>18:38</td> <td>EE</td> <td>Marc</td> <td>LVEA</td> <td>N</td> <td>Cable work</td> <td>23:45</td> </tr> <tr> <td>19:51</td> <td>FAC</td> <td>Richard</td> <td>LVEA</td> <td>N</td> <td>Walkabout</td> <td>19:57</td> </tr> <tr> <td>19:56</td> <td>ISC</td> <td>Siva, Mayank</td> <td>Optics Lab</td> <td>Local</td> <td>ISS Array Work</td> <td>21:36</td> </tr> <tr> <td>20:07</td> <td>OPS</td> <td>Ryan C</td> <td>LVEA</td> <td>N</td> <td>Dust monitor cable tracing</td> <td>21:20</td> </tr> <tr> <td>20:10</td> <td>FAC</td> <td>Tony, Corey</td> <td>LVEA</td> <td>N</td> <td>HAM1 Bolt Removal</td> <td>21:52</td> </tr> <tr> <td>20:40</td> <td>VAC</td> <td>Jordan</td> <td>LVEA</td> <td>N</td> <td>Leak Check</td> <td>00:38</td> </tr> <tr> <td>20:40</td> <td>VAC</td> <td>Janos</td> <td>LVEA</td> <td>N</td> <td>Leak Check</td> <td>00:38</td> </tr> <tr> <td>20:41</td> <td>VAC</td> <td>Travis, Gerardo</td> <td>LVEA</td> <td>N</td> <td>HAM6 Gauge Replacement</td> <td>22:28</td> </tr> <tr> <td>20:41</td> <td>AOS</td> <td>Ryan C</td> <td>FCES</td> <td>N</td> <td>Dust monitor cable retrieval</td> <td>21:04</td> </tr> <tr> <td>20:58</td> <td>ISC</td> <td>Rahul</td> <td>Optics Lab</td> <td>Local</td> <td>ISS Array Work</td> <td>21:36</td> </tr> <tr> <td>21:03</td> <td>FAC</td> <td>Tyler, Richard</td> <td>LVEA</td> <td>N</td> <td>I-Beam</td> <td>22:02</td> </tr> <tr> <td>21:30</td> <td>EE</td> <td>Fil</td> <td>LVEA</td> <td>N</td> <td>HAM1 cable work</td> <td>23:30</td> </tr> <tr> <td>23:21</td> <td>VAC</td> <td>Gerardo</td> <td>LVEA</td> <td>NN</td> <td>Lockout GV1</td> <td>00:21</td> </tr> </tbody> </table> <!--- Output file_1_83709 div --> <div id="file_1_83709" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83709 div --> </div> <!--- Output files_1_83709 div --> <div id="files_1_83709" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83709_20250402164725_GuardianConfigStatesWed.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83709_20250402164725_GuardianConfigStatesWed.jpg" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83709 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83709 ibrahim.abouelfettouh@ligo.org Wed, 02 Apr 2025 16:47:38 -0700 LHO General H1 AOS - FARO LVEA Setup and Alignment (WP 11757) https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83685 <p>Author: jason.oberling@ligo.org</p><p>Report ID: 83685</p><p>R. Crouch, J. Oberling, M. Robinson, T. Guidry, T. O&#39;Hanlon</p> <p>Incoming wall of text, but here&#39;s the short, short version:&nbsp; Over the past ~15 months during available Tuesday maintenance windows we have been working the FARO around the LVEA, setting alignment nests so we have the ability to drop the FARO almost anywhere in the LVEA and have it aligned to the local LVEA coordinate system.&nbsp; I&#39;m happy to report that, after working through and around unavoidable delays (mostly the emergency vent for OFI repair and the PSL frequency noise issues from the latter half of 2024, as well as several maintenance periods where IAS personnel were unavailable due to other required maintenance work) this effort is finally complete.&nbsp; There are now 53 bright red Spherically-Mounted Retroflector (SMR) nests around the LVEA, and a number around the frame of the high-bay rollup door and the nearby wall; these nests have been aligned to the LVEA local coordinate system.&nbsp; The naming scheme is F-CSXXX: F for FARO, CS for the building (Corner Station in this case), and XXX is the monument number.</p> <p>As a brief reminder of where things were left before we started moving the FARO around the LVEA, we had found what appeared to be a good alignment to our West Bay alignment monuments (BTVE-1, PSI-1, PSI-2, PSI-6, and height marks 901, 902, and 903 (for z-axis alignment only)).&nbsp; We had found multiple errors in z-axis coordinates for the 4 alignment monuments, eventually having to perform a water tube level survey of the BSC2 door flanges to re-establish our Z=0, then propagate that measurement to our alignment monuments to establish accurate z-axis coordinates w.r.t. WBSC2.&nbsp; Alogs from that work for some &quot;light&quot; reading: <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=75669">75669</a>, <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=75771">75771</a>, <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=75974">75974</a>, <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=76889">76889</a>, and <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=77216">77216</a>.</p> <p><strong>Jumping the X-arm Beam Tube</strong></p> <p>Our main challenge with this effort was moving the FARO to the other side of the X-arm beam tube (BT).&nbsp; Our most readily-accesible alignment monuments for the FARO are all in the West Bay, with no access back to these monuments once we had moved to the outside of the BT; this simple fact makes an accurate device move for the FARO very difficult (a device move is most accurate when we can shoot a mixture of nests at the new position and at the previous position(s) ).&nbsp; We had set several nests along the wall near the X-arm BT to assist in making the move, as well as using existing nests along the frame of the High-Bay rollup door, but still our position errors for the device move were &gt;0.5 mm.&nbsp; TJ O&#39;Hanlon was visiting in June 2024 and we brainstormed several methods to tighten up this positional uncertainty.&nbsp; Ultimately we decided to place temporary nests on the BTs themselves to aid in the initial and final device moves (temporary because as soon as we vent the nests move with the vacuum system, and don&#39;t necessarily return to the same spot once the vertex is back under vacuum).&nbsp; We set 4 nests along the top of the X-arm BT, 6 nests along the top of the Y-arm BT, and a single lonely nest on the bottom of the Y-arm BT; the Y-arm BT nests we to allow us to close the circle once we moved from the input arm area back into the West Bay.&nbsp; At this point we were interrupted for some PSL work (PMC swap, early July), the vertex vent for the OFI repair (July - August), and then the PSL frequency noise issues (late-September to December).&nbsp; We were finally able to restart this effort in mid-December 2024 and test our &quot;new&quot; method for jumping the BT.&nbsp; And it worked!&nbsp; Our first positional uncertainty was &lt;0.1 mm, so we began setting alignment nests and moving the FARO around the LVEA.</p> <p><strong>Moving Around the LVEA</strong></p> <p>We started in the High-Bay area, setting nests as needed and moving to the next position to set more nests, then moving to the next position to set more...&nbsp; You get the idea.&nbsp; Our route took us around the outside of the LVEA.&nbsp; Starting in the High-Bay area, we proceeded down the +X side of the output arm (WHAM 5/6) and back up the -X side towards WHAM3; then down the -Y side of the input arm, around the PSL enclosure, and then back up the +Y side; and finally back in the West Bay to tie back into our original nests and apply the alignment to the LVEA local coordinate system.&nbsp; The issue here is the FARO really likes a large volume for accurate device moves, and this is something we definitely <strong><em>do not</em></strong> have along the outside edge of the LVEA (this is also where most IAS work takes place).&nbsp; We are essentially moving down a series of hallways, the hallways being the narrow walking areas between the vacuum chambers and the LVEA walls.&nbsp; These narrow corridors restrict the volume we can use for setting nests, which means device position errors begin stacking up as we continue to move around the LVEA.&nbsp; In addition, due to the vacuum equipment restricting line of sight we quickly lose sight of nests at previous device positions, which in turn causes position errors to begin stacking up; for most of our trip around the LVEA we only had sight to the device position immediately preceding the current one, and nothing further back.&nbsp; This is, unfortunately, unavoidable due to the physical layout of the LVEA.&nbsp; In an ideal world we would be able to do all of this with an empty LVEA, but that&#39;s not possible so we deal with what we have.</p> <p>PolyWorks can estimate the device position error, so the 1st attached picture shows the results after we completed our circuit around the LVEA and tied back into our initial monuments in the West Bay.&nbsp; Ignore the Pass/Fail under the Test column, I didn&#39;t change PolyWorks&#39; default of 0.25 mm and we don&#39;t really have a metric for this right now, the important thing here is the value in the Uncertainty column.&nbsp; PolyWorks uses a Monte Carlo simulation to calculate device position uncertainty, defaults to 100 simulations per device position; these results are given as 2 standard deviations (PolyWorks default) for each position from the instrument origin.&nbsp; This means that ~95% of the device&#39;s calculated positions from the simulations are within the listed uncertainty.&nbsp; Position 1 is our starting point by WBSC4 (old H2 BS chamber), with a view of our temporary nests on the X and Y BT, as well as the nests on the wall across the X BT and the High-Bay rollup door frame; position 2 is our jump over the X-arm BT; positions 3 through 6 are down the output arm and back up the other side to WHAM3; positions 7 through 10 are down the input arm, around the PSL enclosure, and back up the +Y side; position 11 is the final position we used before moving back into the West Bay, near the TCSy table (with a view of the monuments we placed on the Y-arm BT); position 12 is back in the West Bay close to the biergarten, and positions 13 and 14 are near the mechanical test stand by the West wall of the LVEA (14 is a repeat of 13 to account for device drift after sitting overnight).&nbsp; As can be seen, the estimated positional uncertainty grows as we move down the &quot;hallways&quot; of the output and input arms, with the worst uncertainty at the positions furthest from our starting point (positions 7-10, around the input arm).&nbsp; At this time I&#39;m not sure we can do much better, given the constraints of the physical layout of the LVEA; we spoke with LLO at the last IAS meeting and they reported seeing similar numbers in their LVEA circuit.&nbsp; With the LVEA circuit complete, we moved back into the West Bay to grab the last nests there that couldn&#39;t see from our initial position and to align to the LVEA local coordinate system.</p> <p><strong>Aligning to the LVEA Local Coordinate System</strong></p> <p>Back in the West Bay we collected the last of the red nests for FARO alignment and our alignment monuments (BTVE-1, PSI-1, PSI-2, PSI-6, and height marks 901, 902, and 903).&nbsp; We used the 5&quot; sphere fit rod to grab BTVE-1 and the PSI monuments.&nbsp; We replaced the magnetic nests we had been using for the 3 height marks with glue nests, and glued them down.&nbsp; Using an autolevel and a scale we measured the difference between where the nest ended up and where the height marks were (since the glue sets fast we couldn&#39;t sight the nests in directly inline with the height marks):</p> <ul> <li>Nest z-axis position w.r.t. height mark <ul> <li>901: +0.5 mm</li> <li>902: -1.7 mm</li> <li>903: -0.5 mm</li> </ul> </li> </ul> <p>As done back in April 2024 (alog 77216), we used the z-axis coordinate for the BTVE and PSI monuments that had been corrected for the depth of the punch in the monument (since the sphere fit rod measures to the point at the base of the rod, which sits in the punch, and not the monument surface) and that had been corrected by our water tube level survey of WBSC2.&nbsp; We used BTVE and the 3 PSI monuments to get a rough X,Y,Z alignment (again, not using PSI-6 for z-axis alignment since we do not trust its z-axis coordinate).&nbsp; This rough alignment was then used to capture X and Y coordinates for the nests at the height marks, then the height marks were used to enhance the z-axis alignment (not used for X and Y).&nbsp; The results of this alignment are shown in the 2nd attached picture; for ease of comparison I&#39;ve included the alignment results from April 2024, see the 3rd attached picture.&nbsp; This alignment is similar to the one we had back in April 2024, with a couple of differences that at first glance look large.&nbsp; The X and Y coordinates for height marks 901, 902, and 903 deviate by large amounts compared to what we had measured with our rough, BTVE/PSI only alignment, which was not the case in our April 2024 alignment.&nbsp; But if you look closely, you see that the measured components for the height marks in both alignments (March 2025 and April 2024) are very similar; this is what is important.&nbsp; We don&#39;t really care about the X and Y coordinates for the 3 height marks as we aren&#39;t using them in the alignment, and they were only captured using a rough alignment to begin with.&nbsp; The fact the measured components are matching fairly well lends some confidence to this alignment.&nbsp; The difference between the 2 that has the most potential impact is in the measured z-axis coordinates of the BTVE/PSI monuments.&nbsp; These z-axis coordinates are all roughly a factor of 2 worse in the March 2025 alignment vs the April 2024 one.&nbsp; In addition, the alignment statistics on the left side of the screenshot are all better in the April 2024 alignment.&nbsp; The only explanation I have for this is in April 2024 we were working in the West Bay and only the West Bay, while here and now we moved the tracker all over the LVEA, thereby carrying around some positional error in the device that wasn&#39;t present in the April 2024 alignment.&nbsp; The only way to really test this alignment is to measure some monuments/features in the LVEA with known coordinates and see how they match.&nbsp; The upcoming pre-deinstall FARO shots to the WHAM1 passive stack will be a good test of this alignment.&nbsp; Another good monument to look at would be BTVE-5, over by the X-arm termination slab (by the cryopump/OpLev area).</p> <p>As another test, since we haven&#39;t exactly trusted the repeatability of the sphere fit rod in the past, we tried using points for PSI-1 and PSI-2 and applying the alignment using those; we still had to use the sphere fit rod on BTVE-1 due to its dome shape and on PSI-6 due to it sitting inside an electronics rack in the biergarten (the bottom rail of the rack blocks direct line of sight to the monument, but the 5&quot; sphere fit rod clears the top of it).&nbsp; The results of this are shown in the 4th attached picture.&nbsp; Right away it&#39;s clear this alignment is not as good as the one shown in the 2nd picture.&nbsp; The statistics are all worse, and the match between measured coordinates is worse as well.&nbsp; This one gets discarded and we move ahead with the previous alignment using sphere fit rods for the BTVE/PSI monuments.&nbsp; Next we tested importing our move device targets into a blank PolyWorks file and aligning to them.</p> <p><strong>Global Target Test</strong></p> <p>PolyWorks allows you to import global targets from a text file.&nbsp; In PolyWorks, a global target is one whose position is precisely known and does not change.&nbsp; Now that we&#39;ve applied our alignment to our list of device position targets we have [X,Y,Z] coordinates in the LVEA local coordinate system for all of them.&nbsp; These coordinates can be exported into an Excel spreadsheet and formatted into a text file for import into a future PolyWorks project.&nbsp; We did a test of this, using a duplicate of our working PolyWorks project to keep from accidentally modifying our working project file.&nbsp; The format for the text file is 4 columns: X position, Y position, Z position, monument name.&nbsp; The file can have no headers (PolyWorks gets mad if there are headers), and the units must be consistent (we use mm).&nbsp; When importing the text file you have to specify the units used on the Import Global Target window (again, we use mm).&nbsp; Once the targets have been imported into the new PolyWorks project, you set the tracker somewhere in the workspace with a good view of global target nests and measure them.&nbsp; The tracker then automatically aligns to the coordinates of the global targets, thereby automatically aligning itself to the LVEA local coordinate system.&nbsp; We did this using a blank project, and the results are shown in the 5th attached picture.&nbsp; For the height marks we used the same nominal coordinates from the alignment (2nd picture again).&nbsp; This is why they look so far off at first glance, but if you compare the measured coordinates they match really good.&nbsp; For the PSI monuments we used a different toolilng to take those measurements.&nbsp; Instead of the sphere fit rod we used our Hubbs Center Punch Nest (CPN).&nbsp; This nest has a 2&quot; vertical offset (the center of the SMR sits 2&quot; above the bottom of the nest) and a built-in center punch for either making punch marks in monuments or accurately setting the nest in an existing punch mark.&nbsp; Because of this we had to remove the z-axis correction for the punch depth we needed for the sphere fit rod, as the Hubbs CPN measures to the monument surface not the bottom of the punch.&nbsp; These also look really good, with the exception of the measured z-axis coordinate for PSI-2.&nbsp; At this time I don&#39;t really have an explanation for this discrepancy.</p> <p>We also used these test coordinates to take some preliminary shots of the 2 accessible -X WHAM1 support tube ends; details of that in a future alog (this one is long enough already).</p> <p>While pulling screenshots off of the FARO laptop for this alog I also exported the device position targets from our main working file, as these are the global targets we are going to use going forward (FARO_CS_LVEA_Global_Targets_v1.xlsx).&nbsp; Between the main working file and the test file used to generate the global target list for the test in the two immediately preceding paragraphs, the only difference is a new device position in the main file, position 14; position 14 was necessary in the main working file as the FARO was sitting in the same spot for a week between maintenance windows (March 18 to March 25) and had therefore drifted in that timeframe (the FARO and tripod stand are heavy and slowly sink into the vinyl floor of the LVEA).&nbsp; The fix for this is to do a Move Device action without actually moving the device, which accounts for any drift from the previous position.&nbsp; The starting, unaligned coordinates of the red nests (which we turn into global targets) are the same, the alignment results are the same; again the only difference is that new position 14 in the main working file.&nbsp; While removing the BT nests from the target list (since we are not going to use these for placing the FARO) I noticed that the coordinates looked a little different than I remembered.&nbsp; So I threw together a quick and dirty comparison spreadsheet to calculate the differences (Global_Target_Coordinate_Differences.xlsx).&nbsp; The first 4 columns of data are from the main working file, the next r columns of data are from the test file, and the final 3 columns are the difference (test - main).&nbsp; Sure enough, the coordinates from the main file differ from the test file.&nbsp; I set conditional formatting to turn red for any differences outside of +/-0.1 mm.&nbsp; The largest differences are all in z-axis coordinates, and the largest of these are all nests placed along the input arm of the IFO (WHAM1/2/3) where are device position uncertainties are the largest.&nbsp; These are small differences, the largest being on the order of 0.25 mm, spread out over 10s of meters of LVEA space, so I don&#39;t think this is a big issue, but interesting to note nonetheless.</p> <p>And that&#39;s it!&nbsp; I&#39;ll write another alog detailing the preliminary shots of the WHAM1 -X support tube ends.&nbsp; The FARO is ready to go for the upcoming pre-deinstall shots of the WHAM1 passive stack (currently slated for Monday on the Trello).&nbsp; This finally closes LHO <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=11757">WP 11757</a>.</p> <!--- Output file_1_83685 div --> <div id="file_1_83685" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83685 div --> </div> <!--- Output files_1_83685 div --> <div id="files_1_83685" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250401155424_FARO_LVEA_Alignment_DevicePosition_3-25-2025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83685_20250401155424_FARO_LVEA_Alignment_DevicePosition_3-25-2025.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250402143444_FARO_LVEA_Alignment_Final_3-25-2025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83685_20250402143444_FARO_LVEA_Alignment_Final_3-25-2025.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250402163236_FARO_Align_LocalCS_4-16-2024.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83685_20250402163236_FARO_Align_LocalCS_4-16-2024.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250402163248_FARO_LVEA_Alignment_PSIPoints_3-25-2025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83685_20250402163248_FARO_LVEA_Alignment_PSIPoints_3-25-2025.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250402163253_FARO_LVEA_Alignment_Test_3-25-2025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83685_20250402163253_FARO_LVEA_Alignment_Test_3-25-2025.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83685 div --> </div> <!-- Output break div. --> <div class="break"></div> <!--- Output file_0_83685 div --> <div id="file_0_83685" class="commentHdr"> Non-image files attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_0_83685 div --> </div> <!--- Output files_0_83685 div --> <div id="files_0_83685" class="reportDetails"> <div class="uploadedImg"> <div class="uploadedFileType"><img src="https://alog.ligo-wa.caltech.edu/aLOG/images/xlsx.gif" class="" /></div> <div class="uploadedFileName"><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250402161537_FARO_CS_LVEA_Global_Targets_v1.xlsx" target="blank">FARO_CS_LVEA_Global_Targets_v1.xlsx</a></div> </div> <div class="uploadedImg"> <div class="uploadedFileType"><img src="https://alog.ligo-wa.caltech.edu/aLOG/images/xlsx.gif" class="" /></div> <div class="uploadedFileName"><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83685_20250402161542_Global_Target_Coordinate_Differences.xlsx" target="blank">Global_Target_Coordinate_Differences.xlsx</a></div> </div> <!-- Output break div. --> <div class="break"></div> <!--- Close files_0_83685 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83685 jason.oberling@ligo.org Wed, 02 Apr 2025 16:34:06 -0700 H1 AOS H1 SEI - Comment to Looking at SEI HEPI/ISI Pointing after Locking https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83708 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83708</p><p>Same comparisons are below for HAM1, HAM2, HAM3 for before and after HEPI Locking</p> <p><strong>HAM1:</strong></p> <p>L4Cs: Just got noiser since Jim moved them. I don&#39;t think this can be used as a comparison for alignment but screenshotted below nonetheless.</p> <p>HEPI: Largest change is in Z with 11.2um</p> <p>HAM1 plots also show another change about 4/5 hours ago, which is the HAM1 vent</p> <p><strong>HAM2:</strong></p> <p>ISI: Largest change is in RZ with 22.3urad</p> <p>HEPI: Largest change is in HP by 10.9um</p> <p><strong>HAM3:</strong></p> <p>ISI: Largest change is in RZ with 23.4urad</p> <p>HEPI: Largest changes are Y&nbsp; by 10.3um and VP by 13.8um</p> SEI <!--- Output file_1_83708 div --> <div id="file_1_83708" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83708 div --> </div> <!--- Output files_1_83708 div --> <div id="files_1_83708" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83708_20250402160522_HAM1IPSHEPIalignmentchanges.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83708_20250402160522_HAM1IPSHEPIalignmentchanges.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83708_20250402160528_HAM1L4Calignmentchanges.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83708_20250402160528_HAM1L4Calignmentchanges.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83708_20250402160534_HAM2IPSHEPIalignmentchanges.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83708_20250402160534_HAM2IPSHEPIalignmentchanges.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83708_20250402160540_HAM2CPSISIalignmentchanges.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83708_20250402160540_HAM2CPSISIalignmentchanges.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83708_20250402160547_HAM3IPSHEPIalignmentchanges.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83708_20250402160547_HAM3IPSHEPIalignmentchanges.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83708_20250402160620_HAM3CPSISIalignmentchanges.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83708_20250402160620_HAM3CPSISIalignmentchanges.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83708 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83708 ibrahim.abouelfettouh@ligo.org Wed, 02 Apr 2025 16:14:40 -0700 H1 SEI H1 ISC - PR Gain, Circulating Power, chamber tempurature and RH settings over last 6 months https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83707 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83707</p><p><em>Matt, Camilla</em></p> <p>While looking into a reason that we needed to continually increase EY RH over the last 6 months to avoid PIs, we&#39;ve attached some trends.</p> <p>In the past ~6 months there there was a <strong>2% decrease in circulating power corresponding with a kappa_c decrease</strong>, Sheila and Dana found the same in 2023 <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=75193">75193</a>. <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83707_20250402155928_CircPwr_6months.png">Plot here</a>. Sheila and Dana thought this was as the OMC throughput has degraded since installation but we haven&#39;t re-checked that the balance of the two OMC DCPDs.</p> <p>There is two distinct changes in PRG over the last 6 months: 10th Dec 2024 and 1st Feb 2025, I initially though they were conveniently a week or so before the EY RH increase, however they are when IM4 trans was centered <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=81735">81735</a> / re-calibrated <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=82260">82260</a> which probably cannot cause a physical change.</p> <p>Interestingly the OM2 temperature is an interesting measure of the in change in temperature and that does change over the last 6 months, it&#39;s not clearly correlated with the circulating power change. Bottom trend of <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83707_20250402155928_CircPwr_6months.png">attached plot</a>.</p> CAL <!--- Output file_1_83707 div --> <div id="file_1_83707" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83707 div --> </div> <!--- Output files_1_83707 div --> <div id="files_1_83707" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83707_20250402155928_CircPwr_6months.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83707_20250402155928_CircPwr_6months.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83707 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83707 camilla.compton@ligo.org Wed, 02 Apr 2025 16:04:35 -0700 H1 ISC H1 SEI - Looking at SEI HEPI/ISI Pointing after Locking https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83705 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83705</p><p><em>Ibrahim, Ryan S, Betsy, Sheila, Camilla </em></p> <p>Getting a baseline for how much the HAM chambers have moved since they were locked.</p> <ul> <li><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83705_20250402150658_HAM4_SEI.png">HAM4</a> <ul> <li>HEPI RX,RY,RZ changed by 5urad, 6urad, 0.2urad</li> <li>ISI RX,RY,RZ changed by 5urad, 1urad, <strong>26urad</strong></li> </ul> </li> <li><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83705_20250402151032_HAM5_SEI.png">HAM5</a> <ul> <li>HEPI RX,RY,RZ changed by 4urad, 0.3urad, 0.7urad</li> <li>ISI RX,RY,RZ changed by 7urad, 3urad, <strong>45urad</strong></li> </ul> </li> <li><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83705_20250402152105_HAM6_SEI.png">HAM6</a> <ul> <li>HEPI RX,RY,RZ changed by <strong>18urad</strong>, 2urad, 6urad</li> <li>ISI RX,RY,RZ changed by 6urad, 3urad, <strong>30urad</strong></li> </ul> </li> </ul> <p><strong>Highlighted </strong>the highest changes but none of these look particularly large.</p> <p>HAM5 and HAM6 tripped just at the end of these trends too, not included in differences above, maybe a WD trip when a SEI is locked doesn&#39;t matter anyway.</p> <!--- Output file_1_83705 div --> <div id="file_1_83705" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83705 div --> </div> <!--- Output files_1_83705 div --> <div id="files_1_83705" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83705_20250402150658_HAM4_SEI.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83705_20250402150658_HAM4_SEI.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83705_20250402151032_HAM5_SEI.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83705_20250402151032_HAM5_SEI.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83705_20250402152105_HAM6_SEI.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83705_20250402152105_HAM6_SEI.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83705 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83705 camilla.compton@ligo.org Wed, 02 Apr 2025 15:22:37 -0700 H1 SEI H1 PEM - BSC8 Dust monitor https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83706 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83706</p><p>I set up an internally pumped dust monitor, that I borrowed from the FCES (it was off down there). I used LVEA10&#39;s network cable from the Biergartens dust monitor so BSC8s cleanroom dust monitor is trendable as Dust mon LVEA10. The pumpless dust monitor in the biergarten is still taking samples but they&#39;re&nbsp;not being written to epics.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83706 ryan.crouch@ligo.org Wed, 02 Apr 2025 15:17:40 -0700 H1 PEM H1 General - HAM1 E/W Door Bolts Removed https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83704 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83704</p><p>Tony, Corey:&nbsp; HAM1 E/W Door bolts <em>mostly</em> removed; except for a set of 4-bolts on each door which were&nbsp;<em>detorqued</em>&nbsp;and their nut backed off a 1/2 turn.</p> VE https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83704 corey.gray@ligo.org Wed, 02 Apr 2025 14:56:35 -0700 H1 General H1 SQZ - Comment to Rough Balancing of OPOS Complete https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83703 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83703</p><p>This was not updated in ISC,&nbsp;<a href="https://ics.ligo-la.caltech.edu/JIRA/browse/ASSY-D1500295-D1500295-H1">ASSY-D1500295-D1500295-H1</a>, I have now removed D1500420,&nbsp;D1500422,&nbsp;D1500423,&nbsp;D1500479 x1, D1500480 x2,&nbsp;&nbsp;and added&nbsp;D1500419-v4 02, D1500421-v3 s/n1, D1900503-v1 005 to the record. The&nbsp;D060359 parts are bulk so not updated, more were&nbsp;added when balancing in chamber&nbsp;<a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=59939">59939</a>.&nbsp;</p> SUS https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83703 camilla.compton@ligo.org Wed, 02 Apr 2025 12:16:45 -0700 H1 SQZ H1 CDS - Comment to VACSTAT: gauges in vent area removed from system https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83702 <p>Author: david.barker@ligo.org</p><p>Report ID: 83702</p><p>HAM1 alarms have been removed from the system for the duration of the vent.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83702 david.barker@ligo.org Wed, 02 Apr 2025 10:34:21 -0700 H1 CDS LHO VE - Wed CP1 Fill https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83701 <p>Author: david.barker@ligo.org</p><p>Report ID: 83701</p><p><strong>Wed Apr 02 10:04:28 2025 INFO: Fill completed in 4min 25secs</strong></p> <p>Fill tripped on a LN2 spurt before the main flow, but still looks like a good fill.</p> <!--- Output file_1_83701 div --> <div id="file_1_83701" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83701 div --> </div> <!--- Output files_1_83701 div --> <div id="files_1_83701" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83701_20250402102305_CP1-1087.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83701_20250402102305_CP1-1087.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83701 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83701 david.barker@ligo.org Wed, 02 Apr 2025 10:23:08 -0700 LHO VE H1 CDS - Timing glitch h1sush7, all models restarted https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83698 <p>Author: david.barker@ligo.org</p><p>Report ID: 83698</p><p><em>Ibrahim, Ryan S, Erik, Dave:</em></p> <p>Around the same time as there was work being done at the corner station mechanical room mezzanine, h1sush7 had a timing glitch requiring the restart of the h1iopsush7 model (and therefore all user models).</p> <p>Ibrahim and Ryan S consolidated the SDFs for h1susfc1, h1sussqzin and verified the mezanine work was completed.</p> <p>We restarted all the models, reset the SWWD, cleared IPC and CRC errors to return the system to nominal.</p> <p>I have added this event to an already opened ticket for h1sush7&nbsp;<a href="https://services1.ligo-la.caltech.edu/FRS/show_bug.cgi?id=20317">FRS20317</a></p> <p>Wed02Apr2025<br /> LOC TIME HOSTNAME &nbsp; &nbsp; MODEL/REBOOT<br /> 09:55:21 h1sush7 &nbsp; &nbsp; &nbsp;h1iopsush7 &nbsp;<br /> 09:55:35 h1sush7 &nbsp; &nbsp; &nbsp;h1susfc1 &nbsp; &nbsp;<br /> 09:55:49 h1sush7 &nbsp; &nbsp; &nbsp;h1sussqzin &nbsp;<br /> 09:56:03 h1sush7 &nbsp; &nbsp; &nbsp;h1susauxh7 &nbsp;<br /> &nbsp;</p> <!--- Output file_1_83698 div --> <div id="file_1_83698" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83698 div --> </div> <!--- Output files_1_83698 div --> <div id="files_1_83698" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83698_20250402100223_h1iopsush7_timing_glitch.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83698_20250402100223_h1iopsush7_timing_glitch.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83698 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83698 david.barker@ligo.org Wed, 02 Apr 2025 10:05:20 -0700 H1 CDS LHO VE - Comment to HAM6 Interlock Status After HAM6 Vacuum Gauge Failure Last Night https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83700 <p>Author: filiberto.clara@ligo.org</p><p>Report ID: 83700</p><p>HAM6 interlock has been restored. HAM6 gauge is scheduled to be replaced during upcoming vent. See alog <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83695">83695</a>.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83700 filiberto.clara@ligo.org Wed, 02 Apr 2025 10:04:53 -0700 LHO VE H1 General - Comment to High Voltage Shutdown Preparation https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83699 <p>Author: filiberto.clara@ligo.org</p><p>Report ID: 83699</p><p>The interlock for HAM6 that was bypassed last December (alog&nbsp;<a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=82011">82011</a>) has been restored. The gauge on HAM6 is scheduled to be replaced during the upcoming vent.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83699 filiberto.clara@ligo.org Wed, 02 Apr 2025 10:02:58 -0700 H1 General H1 General - Comment to High Voltage Shutdown Preparation https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83697 <p>Author: filiberto.clara@ligo.org</p><p>Report ID: 83697</p><p>WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12434">12434</a><br /> WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12260">12260</a><br /> Procedure <a href="https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?.submit=Identifier&amp;docid=M1300464&amp;version=">M1300464</a></p> <p>The following high voltage power supplies/electronics were powered off in preparation for the corner vent.</p> <p>1. CER Mezzanine - ESD HV<br /> 2. CER Mezzanine - Fast Shutter HV<br /> 3. CER Mezzanine - OMC PZT HV<br /> 4. CER - SR3 and ITM heaters<br /> 5. LVEA - Fast Shutter Driver Chassis - Disabled and powered off<br /> 6. MER Mezzanine - HAM7 PSAMS HV<br /> 7. MER Mezzanine - HAM7 Piezo HV</p> <!--- Output file_1_83697 div --> <div id="file_1_83697" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83697 div --> </div> <!--- Output files_1_83697 div --> <div id="files_1_83697" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83697_20250402095814_ESDITMX%26ITMY.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83697_20250402095814_ESDITMX%26ITMY.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83697_20250402095821_HAM6FastShutterandPZT.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83697_20250402095821_HAM6FastShutterandPZT.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83697_20250402095832_Ring%26SRSHeater.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83697_20250402095832_Ring%26SRSHeater.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83697_20250402095846_FastShutterDriverChassisOFF.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83697_20250402095846_FastShutterDriverChassisOFF.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83697_20250402095912_HAM7PSAMSandPZT.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83697_20250402095912_HAM7PSAMSandPZT.jpg" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83697 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83697 filiberto.clara@ligo.org Wed, 02 Apr 2025 09:59:19 -0700 H1 General H1 General - Comment to High Voltage Shutdown Preparation https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83696 <p>Author: ryan.short@ligo.org</p><p>Report ID: 83696</p><p>I disabled all picomotor drivers (usually we keep these all disabled anyway, but still Squeezer HAM7 was the only one enabled) and turned off all SQZ TECs. The instructions only list the OPO, but there are three more: OFI, SFI1, and SFI2. I turned these off by switching the Servo toggle to &quot;Off&quot; in the upper-right of each TEC&#39;s medm screen (screenshot attached).</p> SQZ <!--- Output file_1_83696 div --> <div id="file_1_83696" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83696 div --> </div> <!--- Output files_1_83696 div --> <div id="files_1_83696" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83696_20250402092702_SQZ_TECs_off_04022025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83696_20250402092702_SQZ_TECs_off_04022025.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83696 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83696 ryan.short@ligo.org Wed, 02 Apr 2025 09:30:58 -0700 H1 General H1 General - High Voltage Shutdown Preparation https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83695 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83695</p><p>Ryan S, Ibrahim</p> <p>In prep for Fil turning off the high voltages, we ramped down and disabled some systems that use it, outlined in <a href="https://dcc.ligo.org/LIGO-M1300464">M1300464</a> (screenshot attached of specific page).</p> <p>The following settings were changed:</p> <ul> <li>ZM4/5 PSAMs ramped down - not in the above doc but on <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12434">Fil&#39;s WP</a> by Sheila&#39;s suggestion</li> <li>Pico High Voltages were disabled</li> <li>SQZ Opo TECs disabled</li> </ul> <!--- Output file_1_83695 div --> <div id="file_1_83695" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83695 div --> </div> <!--- Output files_1_83695 div --> <div id="files_1_83695" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83695_20250402092536_Hi-VoltagePrepInstructions.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83695_20250402092536_Hi-VoltagePrepInstructions.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83695_20250402092541_PSAMsVoltageRampdown.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83695_20250402092541_PSAMsVoltageRampdown.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83695 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83695 ibrahim.abouelfettouh@ligo.org Wed, 02 Apr 2025 09:26:33 -0700 H1 General H1 PEM - HAM1 dust monitor https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83694 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83694</p><p>Yesterday I moved a pumped dust monitor into the HAM1 clean room (dust monitor LVEA5). I set the alarm levels to clean-100 following <a href="https://dcc.ligo.org/DocDB/0126/E1600132/003/DM%20Alarm%20Levels.pdf">E1600132</a> and took a look at the <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83694_20250402085621_HAM1_cleanrm_dm_2025-04-02.png">trend overnight</a>. The 0.5u particle count was steady around zero and the 0.3u was around ~10 counts overnight.</p> <!--- Output file_1_83694 div --> <div id="file_1_83694" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83694 div --> </div> <!--- Output files_1_83694 div --> <div id="files_1_83694" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83694_20250402085621_HAM1_cleanrm_dm_2025-04-02.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83694_20250402085621_HAM1_cleanrm_dm_2025-04-02.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83694 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83694 ryan.crouch@ligo.org Wed, 02 Apr 2025 09:02:15 -0700 H1 PEM H1 CDS - VACSTAT: gauges in vent area removed from system https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83693 <p>Author: david.barker@ligo.org</p><p>Report ID: 83693</p><p><em>Janos, Gerardo, Dave:</em></p> <p>Following some alarms overnight we have decided to remove the LVEA gauges from VACSTAT for the duration of the vent. The other gauges which will remain under vacuum continue to be monitored, but without the increased sensitivity settings.</p> <p>In order to keep the EDC green, a vacstat_dummy_ioc.py is running on opslogin0 to simulate the channels associated with the removed gauges (HAM1, HAM6, BSC2, BSC3).</p> <p>The cell phone alarms to the vacuum group on multiple vacstat detections has also been disabled.</p> <!--- Output file_1_83693 div --> <div id="file_1_83693" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83693 div --> </div> <!--- Output files_1_83693 div --> <div id="files_1_83693" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83693_20250402084645_vacstat_reduced.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83693_20250402084645_vacstat_reduced.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83693 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83693 david.barker@ligo.org Wed, 02 Apr 2025 08:48:43 -0700 H1 CDS LHO General - OPS Day Shift Start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83692 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83692</p><p><strong>TITLE:</strong> 04/02 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Planned Engineering<br /> <strong>OUTGOING OPERATOR:</strong> None<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: MAINTENANCE<br /> &nbsp;&nbsp;&nbsp; Wind: 6mph Gusts, 4mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.17 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.17 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <p><strong>IFO is in PLANNED ENGINEERING </strong>for the vent.</p> <p>Today&#39;s vent tasks:</p> <ul> <li>Crane engine hoist to BSC8 (FAC)</li> <li>Inspect HAM1 and BSC8 final cleanroom (FAC)</li> <li>Turn on HAM1 cleanroom and garb room (FAC)</li> <li>Power down ISC chassis that will be recabled (Fil/EE)</li> <li>Pull ISC cables - NOT COAX yet and work to relabel (Fil/EE)</li> <li>HAM1 Offload HEPI Setup (SEI/Jim/Mitchell)</li> <li>Leak check corner under vac (VAC)</li> <li>Prep for corner vent (VAC)</li> <li>Checklist for HAM1 vent (VAC)</li> <li>HAM1 1st cleaning (Kim/Nellie/FAC)</li> <li>Clean out recieving for ISI (FAC)</li> <li>HAM6 Guage Work (VAC)</li> <li>Checklist for corner vent (VAC)</li> <li>Move forklift to HAM1 south bay area (FAC)</li> <li>Crane or move power bang box to southbay for cleanrooms (FAC)</li> <li>Replace ~3ft of cleanroom panel for HAM2 +Y-X (FAC)</li> <li><strong>Vent HAM1 (VAC)</strong></li> <li>Start HAM1 bolt removal (VAC/Randy)</li> <li>Move HAM1 cleanroom into final place (5 people)</li> <li>Stock garb room by HAM3 (FAC/Kim)</li> <li>Prep laydown areas for stack deinstall, setup door pallet at HAM3+Y</li> <li>Get dust mons working and trending (OPS/RyanC)</li> </ul> <p>Work safe!</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83692 ibrahim.abouelfettouh@ligo.org Wed, 02 Apr 2025 07:46:28 -0700 LHO General H1 CDS - CDS EE Work On HAM1 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83691 <p>Author: filiberto.clara@ligo.org</p><p>Report ID: 83691</p><p>WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12424">12424</a><br /> The field cabling for RM1 and RM2 was disconnected in the CER and field rack. Cables were pulled back from ISC-R4 to SUS-R1. Cables were installed early on and buried&nbsp;in the cable tray. It was decided to cut the connector to ease cable work. Ends will need to be re-terminated. The PM1 field cables arrived onsite and will be installed tomorrow. Work will be outside the HAM1/2 clean room.</p> <p>WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12393">12393</a><br /> The SEI field cables were pulled to the following HAM1 flange locations:</p> <p>Corner 1 (GS-13, L4C, ISI Coil Drive) to Flange D1<br /> Corner 2 (GS-13, L4C, ISI Coil Drive) to Flange D5<br /> Corner 3 (GS-13, L4C, ISI Coil Drive) to Flange D3<br /> HEPI Corner 1&amp;2 to Flange D5<br /> HEPI Corner 3 to Flange D3</p> <p>WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12421">12421</a><br /> Cabling to IOHT2L and ISCT1 was disconnected. Both sets of cables were pulled out of the clean room, clear of any HAM1 activities. The safety interlock system was tripped when cables were being moved off ISCT1. Safety system was restored. The field EtherCAT field boxes EL1908 and cables are located on top of HAM1. They should not interfere with door removal/install.</p> <p>WP <a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12422">12422</a><br /> The vertical cable tray, conduit and part of the floor cable tray was removed to clear the HAM ISI Installation Fixture. Cables to ISCT1 are now routed along the cable tray outside of the clean room.</p> <p>We took time to pull out various DB cables, fibers, RF cables ect that were not being used. Area around HAM1 is now clear. Let us know you see or need anything else moved/cleared for the ISI install.</p> <p>F. Clara, O. Patane, M. Pirello</p> <!--- Output file_1_83691 div --> <div id="file_1_83691" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83691 div --> </div> <!--- Output files_1_83691 div --> <div id="files_1_83691" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83691_20250401181155_HAM1Cleared.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83691_20250401181155_HAM1Cleared.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83691_20250401181337_HAM1VerticalCableTray.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83691_20250401181337_HAM1VerticalCableTray.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83691_20250401181346_HAM1VerticalCableTrayRemoved.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83691_20250401181346_HAM1VerticalCableTrayRemoved.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83691_20250401181357_ISCT1Cables.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83691_20250401181357_ISCT1Cables.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83691_20250401181403_IOHT2LCables.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83691_20250401181403_IOHT2LCables.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83691_20250401181408_SafetyInterlockCabling.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83691_20250401181408_SafetyInterlockCabling.jpg" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83691 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83691 filiberto.clara@ligo.org Tue, 01 Apr 2025 18:24:37 -0700 H1 CDS LHO VE - 2025 April vent - VAC diary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83690 <p>Author: janos.csizmazia@ligo.org</p><p>Report ID: 83690</p>- The corner station clean air supply (Kobelco) was started up - The following GVs have been closed: GV5, GV2, RV1, FCV1, FCV2, FCV3, FCV4, FCV5 - The IPs adjacent to this part of the corner volume have been valved out: IP1, IP2, IP3, IP4, IP14 - The replacement of the HAM6 gauge was attempted, but the electronics of the brand new Inficon replacement gauge is faulty, therefore another one will be installed tomorrow - The Y-manifold turbo has been valved in with a leak checker backing, and the following flanges have been leak checked (no leaky flanges yet): - Y-manifold flanges: - X-; Y+ flanges (3 pcs.) - Vent port (1 pc.) - BSC8: - X- HEPI bellows (2 pcs.) - X- collar flanges (4 pcs.) - X+ Y+ side flanges (3 pcs.) - X+ door flanges (5 pcs.) - HAM2-HAM3 spool: - X+ Y+ side flanges (5 pcs.) - X+ bottom flange (1 pc.) - HAM3: - Y+ door flanges: (5 pcs.) - X- bottom flange (1 pc.) - Y+ bellows (2 pcs.) https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83690 janos.csizmazia@ligo.org Tue, 01 Apr 2025 18:04:44 -0700 LHO VE H1 SUS - Comment to Calibrating the PR3 OSEMs https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83689 <p>Author: edgard.bonilla@ligo.org</p><p>Report ID: 83689</p><p>One way to fix the cross-coupling without having to get the absolute calibration is to slightly modify the M1 PR3 osem gains. They currently sit at:</p> <p>&nbsp;&nbsp;&nbsp; T1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; T3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LF&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RT&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SD</p> <p>&nbsp;1.161&nbsp;&nbsp;&nbsp; 0.998&nbsp;&nbsp;&nbsp; 1.047&nbsp;&nbsp;&nbsp; 1.171&nbsp; &nbsp; 1.163&nbsp;&nbsp;&nbsp; 1.062</p> <p>&nbsp;</p> <p><strong>Their new values would be at</strong></p> <p><strong>&nbsp;&nbsp;&nbsp; T1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; T3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LF&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RT&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SD</strong></p> <p><strong>1.164 &nbsp;&nbsp; 0.903&nbsp;&nbsp;&nbsp; 0.866 &nbsp;&nbsp; 1.073 &nbsp;&nbsp; 1.199&nbsp;&nbsp;&nbsp; 0.942</strong></p> <p>This change will still leave a scaling factor of 1.54 m/(OSEM m), but at least it should fix the L-Y and the V-P-R cross couplings.</p> SEI, SUS https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83689 edgard.bonilla@ligo.org Tue, 01 Apr 2025 16:43:48 -0700 H1 SUS LHO General - OPS Day Shift Summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83688 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83688</p><p><strong>TITLE:</strong> 04/01 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Planned Engineering<br /> <strong>INCOMING OPERATOR:</strong> None<br /> <strong>SHIFT SUMMARY:</strong></p> <p><strong>IFO is in PLANNED ENGINEERING for VENT</strong></p> <p>Extremely productive first vent day in which the following planned tasks were completed:</p> <ul> <li>Transition to Laser SAFE - vent, close light pipes, keys off (TJ) - <strong>DONE</strong></li> <li>Turn Guard States to appropriate DOWN states (OPS) - <strong>DONE</strong></li> <li>Close gate valves (VAC) - <strong>DONE</strong></li> <li>Get purge systems going (VAC) - <strong>DONE</strong></li> <li>Lock all HAM HEPIs (JIM/SEI) - <strong>DONE</strong></li> <li>Crane large West Bay cleanroom over BSC8, inspect (FAC) - <strong>DONE</strong></li> <li>Crane engine hoist to BSC8 (FAC)</li> <li>Inspect HAM1 and BSC8 final cleanroom (FAC)</li> <li>Turn on HAM1 cleanroom/garb room</li> <li>Disconnect ISCT1 cables and see if needed on IOT2 (EE/Fil) - <strong>DONE</strong></li> <li>Disconnect cable trays from HAM1 (EE/Fil) - DONE</li> <li>Mark and move ISCT tables at HAM1 and HAM2 (Camilla/AOS) - <strong>DONE - </strong><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83686">alog 83686</a></li> <li>Remove scaffolding on HAM1/2 +Y (TJ) - <strong>DONE - </strong><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83686">alog 83686</a></li> <li>Power down ISC chassis that will be recabled (Fil/EE)</li> <li>Pull ISC Cables - NOT COAX yet and work to relabel</li> <li>HAM1 Offload HEPI Setup (Jim/Mitchell/SUS)</li> <li>Leak Check corner under vac (VAC)</li> <li>Prep for corner vent (VAC)</li> <li>Checklist for HAM1 Vent (VAC)</li> <li>Set ESD bias drive to XX to reverse charge trend while vented (OPS) - <strong>DONE</strong></li> </ul> <p>As always, check out the <a href="https://trello.com/b/KvBP6G8X/weekly-site-coordination-planning-for-tuesdays">trello</a> for the most up to date vent news.</p> <p>Guardian states are in the configurations attached in the screenshot</p> <p><strong>LOG:</strong></p> <table> <tbody> <tr> <th>Start Time</th> <th>System</th> <th>Name</th> <th>Location</th> <th>Lazer_Haz</th> <th>Task</th> <th>Time End</th> </tr> <tr> <td>14:39</td> <td>FAC</td> <td>Eric</td> <td>Woodshop</td> <td>N</td> <td>Activate Fire Pumps</td> <td>16:21</td> </tr> <tr> <td>15:05</td> <td>EE</td> <td>Fil</td> <td>LVEA</td> <td>N</td> <td>HAM1/2 Table Enclosure Disconnect</td> <td>23:52</td> </tr> <tr> <td>15:10</td> <td>FAC</td> <td>Kim, Nellie</td> <td>FCES</td> <td>N</td> <td>Technical Cleaning</td> <td>15:39</td> </tr> <tr> <td>15:12</td> <td>OPS</td> <td>TJ</td> <td>LVEA</td> <td>N</td> <td>LVEA to Laser Extra Safe (Keys, Light Pipes etc)</td> <td>15:30</td> </tr> <tr> <td>15:34</td> <td>PCAL</td> <td>Tony</td> <td>PCal Lab</td> <td>Local</td> <td>Meas. Setup</td> <td>16:47</td> </tr> <tr> <td>15:39</td> <td>FAC</td> <td>Kim</td> <td>EX</td> <td>N</td> <td>Technical Cleaning</td> <td>17:00</td> </tr> <tr> <td>15:40</td> <td>FAC</td> <td>Nellie</td> <td>EY</td> <td>N</td> <td>Technical Cleaning</td> <td>16:22</td> </tr> <tr> <td>16:09</td> <td>AOS</td> <td>Betsy</td> <td>OptLab</td> <td>N</td> <td>Power meter</td> <td>16:22</td> </tr> <tr> <td>16:24</td> <td>FAC</td> <td>Tyler, Eric</td> <td>LVEA</td> <td>N</td> <td>Scissor lift, Crane Work</td> <td>18:27</td> </tr> <tr> <td>16:24</td> <td>SAF</td> <td>Camilla</td> <td>LVEA</td> <td>N</td> <td>Guillotine for viewports</td> <td>19:05</td> </tr> <tr> <td>16:26</td> <td>VAC</td> <td>Janos, Gerardo, Travis, Jordan</td> <td>LVEA</td> <td>N</td> <td>Corner Vent Prep</td> <td>19:25</td> </tr> <tr> <td>16:26</td> <td>EE</td> <td>Betsy</td> <td>LVEA</td> <td>N</td> <td>Checking on Fil team</td> <td>17:11</td> </tr> <tr> <td>16:36</td> <td>AOS</td> <td>TJ</td> <td>LVEA</td> <td>N</td> <td>Wrap Bag Tag Help</td> <td>19:05</td> </tr> <tr> <td>16:46</td> <td>SEI</td> <td>Jim</td> <td>LVEA</td> <td>N</td> <td>Locking HAM HEPIs</td> <td>18:01</td> </tr> <tr> <td>17:01</td> <td>FAC</td> <td>Kim, Nellie</td> <td>LVEA</td> <td>N</td> <td>Technical cleaning</td> <td>18:49</td> </tr> <tr> <td>17:30</td> <td>FAC</td> <td>Richard</td> <td>LVEA</td> <td>N</td> <td>HAM1 Conduit</td> <td>17:45</td> </tr> <tr> <td>17:43</td> <td>AOS</td> <td>Ibrahim</td> <td>LVEA</td> <td>N</td> <td>Moving ISC tables</td> <td>19:05</td> </tr> <tr> <td>17:51</td> <td>FAC</td> <td>Betsy</td> <td>LVEA</td> <td>N</td> <td>Looking at cabling</td> <td>19:05</td> </tr> <tr> <td>18:09</td> <td>ISC</td> <td>Rahul, Mayank, Siva</td> <td>OptLab</td> <td>Local</td> <td>ISS array work</td> <td>22:56</td> </tr> <tr> <td>18:20</td> <td>CAL</td> <td>Tony</td> <td>PcalLab</td> <td>Local</td> <td>Measurement setup</td> <td>18:30</td> </tr> <tr> <td>18:25</td> <td>SEI</td> <td>Jim, Mitchell</td> <td>FCES, Ends</td> <td>N</td> <td>Picking up parts and FAMIS tasks</td> <td>21:20</td> </tr> <tr> <td>19:17</td> <td>FAC</td> <td>Chris, Eric, Tyler, Randy</td> <td>LVEA</td> <td>N</td> <td>Cleanroom move</td> <td>20:52</td> </tr> <tr> <td>19:35</td> <td>EE</td> <td>Oli</td> <td>LVEA</td> <td>N</td> <td>Helping Fil</td> <td>22:29</td> </tr> <tr> <td>19:43</td> <td>VAC</td> <td>Gerardo</td> <td>LVEA</td> <td>N</td> <td>Cleanroom move help</td> <td>22:06</td> </tr> <tr> <td>19:58</td> <td>AOS</td> <td>TJ, Camilla</td> <td>LVEA</td> <td>N</td> <td>Move Scaffolding by HAM1/2</td> <td>20:34</td> </tr> <tr> <td>20:07</td> <td>VAC</td> <td>Janos, Jordan</td> <td>LVEA</td> <td>N</td> <td>Leak Checks</td> <td>22:06</td> </tr> <tr> <td>20:14</td> <td>PCAL</td> <td>Tony</td> <td>PCAL Lab</td> <td>N</td> <td>PCAL Meas.</td> <td>20:20</td> </tr> <tr> <td>20:46</td> <td>ALS</td> <td>TJ</td> <td>EX, EY</td> <td>N</td> <td>Turning on ALS</td> <td>21:27</td> </tr> <tr> <td>20:56</td> <td>FAC</td> <td>Tyler</td> <td>LVEA</td> <td>N</td> <td>Sock Swap</td> <td>21:38</td> </tr> <tr> <td>21:33</td> <td>TCS</td> <td>Matt, Camilla</td> <td>OptLab</td> <td>Local</td> <td>CO2 Table Work</td> <td>22:56</td> </tr> <tr> <td>21:52</td> <td>SEI</td> <td>Mitchell</td> <td>LVEA</td> <td>N</td> <td>Seismic Assy Size Verification</td> <td>21:58</td> </tr> <tr> <td>21:53</td> <td>AOS</td> <td>Betsy</td> <td>LVEA</td> <td>N</td> <td>Walkabout</td> <td>22:33</td> </tr> <tr> <td>22:06</td> <td>EE</td> <td>Marc</td> <td>LVEA</td> <td>N</td> <td>Helping Fil and Oli with HAM 1/2 Table Enclosures</td> <td>00:05</td> </tr> <tr> <td>22:07</td> <td>VAC</td> <td>Janos</td> <td>LVEA</td> <td>N</td> <td>Leak Checks</td> <td>22:41</td> </tr> <tr> <td>22:41</td> <td>VAC</td> <td>Travis, Gerardo, Jordan</td> <td>LVEA</td> <td>N</td> <td>&nbsp;</td> <td>23:41</td> </tr> <tr> <td>22:42</td> <td>FAC</td> <td>Tyler</td> <td>LVEA</td> <td>N</td> <td>Rigging Transportation</td> <td>22:53</td> </tr> <tr> <td>23:14</td> <td>AOS</td> <td>Betsy</td> <td>LVEA</td> <td>N</td> <td>&nbsp;</td> <td>23:25</td> </tr> <tr> <td>23:29</td> <td>OPS</td> <td>Ryan C</td> <td>LVEA</td> <td>N</td> <td>Dust monitor connectiom</td> <td>00:29</td> </tr> </tbody> </table> <!--- Output file_1_83688 div --> <div id="file_1_83688" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83688 div --> </div> <!--- Output files_1_83688 div --> <div id="files_1_83688" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83688_20250401163223_GuadianConfigStates.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83688_20250401163223_GuadianConfigStates.jpg" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83688 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83688 ibrahim.abouelfettouh@ligo.org Tue, 01 Apr 2025 16:33:02 -0700 LHO General H1 CDS - Comment to bypassed fire pump cell phone alarms during pump testing this morning https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83687 <p>Author: david.barker@ligo.org</p><p>Report ID: 83687</p><p>Alarms has been reconfigured to expect GV2 and GV5 to be in the hard-closed position and alarm if not.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83687 david.barker@ligo.org Tue, 01 Apr 2025 15:46:39 -0700 H1 CDS H1 General - ISCT1 and IOT2 moved away from HAM1/2, HAM2 Scaffolding Removed https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83686 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83686</p><p><em>TJ, Ibrahim, Betsy, Camilla, WPs&nbsp;<a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12428">12428</a>,&nbsp;<a href="https://services2.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=12414">12414</a></em></p> <p>We added guillotines to all VPs, removed the&nbsp;bellows and added yellow VP covers. IOT2 bellows were very tight so couldn&#39;t be removed until we moved the table an ~inch away from&nbsp;HAM2.&nbsp; The tables bellows adapters were covered with ameristat and the bellows were covered with foil and placed on a nearby rack. <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83686_20250401124812_IMG_1715.jpg">Photo</a>.</p> <p>We moved the small garbing cleanroom up against&nbsp;the TSCY /&nbsp;the HAM3 cleanroom. We&nbsp;moved ISCT1 and IOT2 next to it on the other side of the racks, leaving space and a pallet for the HAM1 door. <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83686_20250401124823_IMG_1714.jpg">Photo.</a>&nbsp;</p> <p>TJ and I removed and disassembled the HAM2 scaffolding and stored it with the other scaffolding in the High bay.&nbsp;</p> <!--- Output file_1_83686 div --> <div id="file_1_83686" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83686 div --> </div> <!--- Output files_1_83686 div --> <div id="files_1_83686" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83686_20250401124812_IMG_1715.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83686_20250401124812_IMG_1715.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83686_20250401124823_IMG_1714.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83686_20250401124823_IMG_1714.jpg" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83686 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83686 camilla.compton@ligo.org Tue, 01 Apr 2025 13:59:12 -0700 H1 General H1 TCS - Comment to L5 Laser Beam Scan https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83684 <p>Author: matthewrichard.todd@ligo.org</p><p>Report ID: 83684</p><p>Code for analyzing this data</p> <!--- Output file_0_83684 div --> <div id="file_0_83684" class="commentHdr"> Non-image files attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_0_83684 div --> </div> <!--- Output files_0_83684 div --> <div id="files_0_83684" class="reportDetails"> <div class="uploadedImg"> <div class="uploadedFileType"><img src="https://alog.ligo-wa.caltech.edu/aLOG/images/py.gif" class="" /></div> <div class="uploadedFileName"><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83684_20250401113259_razor_blade_data.py" target="blank">razor_blade_data.py</a></div> </div> <!-- Output break div. --> <div class="break"></div> <!--- Close files_0_83684 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83684 matthewrichard.todd@ligo.org Tue, 01 Apr 2025 11:33:06 -0700 H1 TCS LHO VE - Comment to Tue CP1 Fill https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83683 <p>Author: david.barker@ligo.org</p><p>Report ID: 83683</p><p>TC-B temperature jumped up from -3C to about +15C at 05:04 PDT this morning, possible sensor movement.</p> <!--- Output file_1_83683 div --> <div id="file_1_83683" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83683 div --> </div> <!--- Output files_1_83683 div --> <div id="files_1_83683" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83683_20250401105352_Screenshot2025-04-01at105248.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83683_20250401105352_Screenshot2025-04-01at105248.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83683 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83683 david.barker@ligo.org Tue, 01 Apr 2025 10:53:55 -0700 LHO VE LHO VE - Tue CP1 Fill https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83682 <p>Author: david.barker@ligo.org</p><p>Report ID: 83682</p><p><strong>Tue Apr 01 10:12:47 2025 INFO: Fill completed in 12min 43secs</strong></p> <p>&nbsp;</p> <!--- Output file_1_83682 div --> <div id="file_1_83682" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83682 div --> </div> <!--- Output files_1_83682 div --> <div id="files_1_83682" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83682_20250401103604_CP1-1086.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83682_20250401103604_CP1-1086.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83682 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83682 david.barker@ligo.org Tue, 01 Apr 2025 10:36:07 -0700 LHO VE H1 CDS - turned on all CDS Wifi WAPS, accepted this configuration in CDS SDF https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83681 <p>Author: david.barker@ligo.org</p><p>Report ID: 83681</p> <!--- Output file_1_83681 div --> <div id="file_1_83681" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83681 div --> </div> <!--- Output files_1_83681 div --> <div id="files_1_83681" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83681_20250401100748_Screenshot2025-04-01at100659.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83681_20250401100748_Screenshot2025-04-01at100659.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83681 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83681 david.barker@ligo.org Tue, 01 Apr 2025 10:07:51 -0700 H1 CDS H1 CDS - Comment to bypassed fire pump cell phone alarms during pump testing this morning https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83680 <p>Author: david.barker@ligo.org</p><p>Report ID: 83680</p><p>We are getting multiple VACSTAT alarms as gatevalves are being closed, so for now I&#39;ve bypassed those cell phone alarms.</p> <p>H1:CDS-VAC_STAT_GLITCH_DETECTED</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83680 david.barker@ligo.org Tue, 01 Apr 2025 09:12:55 -0700 H1 CDS H1 CDS - Comment to bypassed fire pump cell phone alarms during pump testing this morning https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83679 <p>Author: david.barker@ligo.org</p><p>Report ID: 83679</p><p>Added GV5 position alarm to bypass</p> <p>&nbsp; &nbsp; H0:VAC-LY_GV5_ZSM159A_VALVE_ANIM<br /> &nbsp;</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83679 david.barker@ligo.org Tue, 01 Apr 2025 08:45:26 -0700 H1 CDS H1 CDS - Comment to bypassed fire pump cell phone alarms during pump testing this morning https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83678 <p>Author: david.barker@ligo.org</p><p>Report ID: 83678</p><p>Added PT114 (CP1)</p> <p>Bypass will expire:<br /> Tue Apr &nbsp;1 12:40:00 PM PDT 2025<br /> For channel(s):<br /> &nbsp; &nbsp; H0:FMC-CS_FIRE_PUMP_1<br /> &nbsp; &nbsp; H0:FMC-CS_FIRE_PUMP_2<br /> &nbsp; &nbsp; H0:VAC-LY_Y3_PT114B_PRESS_TORR<br /> &nbsp;</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83678 david.barker@ligo.org Tue, 01 Apr 2025 08:40:48 -0700 H1 CDS H1 PSL - PSL Cooling Water pH Test https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83677 <p>Author: ryan.short@ligo.org</p><p>Report ID: 83677</p><p>FAMIS <a href="https://ligo-wa.accruent.net/LB_Request_UpdateElevate.asp?InstallID=2&amp;RequestID=24833">24833</a></p> <p>pH of PSL chiller water was measured to be <strong>between 10.0 and 10.5</strong> according to the color of the test strip.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83677 ryan.short@ligo.org Tue, 01 Apr 2025 08:39:34 -0700 H1 PSL H1 SQZ - Comment to SQZ Drops H1 From OBSERVING & SQZ SHG Fiber Rejected Power High https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83676 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83676</p><p><em>Camilla, Sheila.</em></p> <p>The drop was because the OPO PZT ran out of range, see t-cursor on <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83676_20250401082700_PZT1_Voltage_change_SQZ.png">attached plot</a>. It&#39;s a known issue that the SQZ angle (and alignment) changes with different PZT1 voltage.</p> <p>It seems like that the sqz angle was set for 60-70V and was bad once we relocked at 100V. This would have been improved by taking SQZ_MANAGER to SCAN_SQZANG_FDS so it can find the best sqz angle again. If we were running the SQZ_ANG_ADJUST servo, this may have improved itself as you can see the ADF reported SQZ angle change at the time.</p> <p>With the higher (19 vs 11) NLG <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83665">83665</a>, the range and 350Hz SQZ (yellow BLRMS) does seem to be improved, but the high frequency SQZ did seem to be less stable as we thermalized.</p> <!--- Output file_1_83676 div --> <div id="file_1_83676" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83676 div --> </div> <!--- Output files_1_83676 div --> <div id="files_1_83676" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83676_20250401082700_PZT1_Voltage_change_SQZ.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83676_20250401082700_PZT1_Voltage_change_SQZ.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83676 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83676 camilla.compton@ligo.org Tue, 01 Apr 2025 08:29:32 -0700 H1 SQZ H1 CDS - bypassed fire pump cell phone alarms during pump testing this morning https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83675 <p>Author: david.barker@ligo.org</p><p>Report ID: 83675</p><p><em>Eric, Dave:</em></p> <p>Bypass will expire:<br /> Tue Apr &nbsp;1 11:52:44 AM PDT 2025<br /> For channel(s):<br /> &nbsp; &nbsp; H0:FMC-CS_FIRE_PUMP_1<br /> &nbsp; &nbsp; H0:FMC-CS_FIRE_PUMP_2<br /> &nbsp;</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83675 david.barker@ligo.org Tue, 01 Apr 2025 07:54:41 -0700 H1 CDS LHO General - OPS Day Shift Start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83674 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83674</p><p><strong>TITLE:</strong> 04/01 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Lock Acquisition<br /> <strong>OUTGOING OPERATOR:</strong> TJ<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: CALM<br /> &nbsp;&nbsp;&nbsp; Wind: 8mph Gusts, 4mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.02 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.22 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <p><strong>IFO is in NLN and OBSERVING</strong>, but not for long.</p> <p>H1 was running PEM Mag injections when I walked in, which finished and went into OBSERVING thereafter. I will induce a lockloss and set <strong>IFO to PLANNED ENGINEERING</strong> shortly.</p> <p><strong>Today is the first day of our planned Vent Break! </strong>Here is a summary of today&#39;s planned activities, also found on <a href="https://trello.com/b/KvBP6G8X/weekly-site-coordination-planning-for-tuesdays">Trello Coordination Page</a></p> <ul> <li>Transition to Laser SAFE - vent, close light pipes, keys off (TJ)</li> <li>Turn Guard States to appropriate DOWN states (OPS)</li> <li>Close gate valves (VAC)</li> <li>Get purge systems going (VAC)</li> <li>HAM1 vent checklist (VAC)</li> <li>Corner vent prep (VAC)</li> <li>Corner leak check (VAC)</li> <li>Lock all HAM HEPIs (JIM/SEI)</li> <li>Crange large West Bay cleanroom over BSC8, inspect (FAC)</li> <li>Crane engine hoist to BSC8 (FAC)</li> <li>Inspect HAM1 and BSC8 final cleanroom (FAC)</li> <li>Turn on HAM1 cleanroom/garb room</li> </ul> <p>Work safe everybody!</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83674 ibrahim.abouelfettouh@ligo.org Tue, 01 Apr 2025 07:43:25 -0700 LHO General H1 CDS - Workstations updated https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83673 <p>Author: erik.vonreis@ligo.org</p><p>Report ID: 83673</p><p>Workstations were updated.&nbsp; This was an OS packages update.&nbsp; Conda packages were not updated.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83673 erik.vonreis@ligo.org Tue, 01 Apr 2025 07:02:58 -0700 H1 CDS LHO General - Mon EVE Ops Summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83670 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83670</p><p><strong>TITLE:</strong> 03/31 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 150Mpc<br /> <strong>INCOMING OPERATOR:</strong> TJ<br /> <strong>SHIFT SUMMARY:</strong></p> <p>Tonight is the last in-person Operator shift (TJ is the last OWL) before the April-Jun2025 Maintenance+Commissioning Break which begins at 8am (Local Time) tomorrow morning.</p> <p>H1 has been stellar.&nbsp; Rode through an Alaskan EQ and is going on almost 7.75hrs of lock.&nbsp; And the range has been higher than normal (just under 159Mpc)....but then it went back to the normal 150Mpc after the SQZ lost lock and relocked toward the end of the shift.<br /> <strong>LOG:</strong></p> <ul> <li>ISS Array group continues work in the Optics Lab (myank, siva, jennie, keita, rahul) <ul> <li>0015 jennie, rahul, and keita left</li> <li>0215 myank, siva left</li> </ul> </li> <li>0022 Drive to welding shop (vpw bldg) to drop off tooling (jim)</li> <li>0411 Incoming M5.2 EQ from Alaska (Verbal said Canada) at about 2800miles away.&nbsp; <u><strong>H1 rode through this EQ fine</strong>;</u> there was no wind and secondary microseism is just about between the 50th &amp; 95th percentile lines.</li> <li>0436-0439 Dropped from OBSERVING due to SQZ (which restored automatically).&nbsp; SQZ SHG Fiber Rejected Power has been high and has a message about this.</li> </ul> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83670 corey.gray@ligo.org Mon, 31 Mar 2025 22:02:06 -0700 LHO General H1 SQZ - SQZ Drops H1 From OBSERVING & SQZ SHG Fiber Rejected Power High https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83672 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83672</p><p>Just had a ~3min drop from OBSERVING due to SQZ, but it cameback automatically.&nbsp;</p> <p>Did notice the SQZ_OPO_LR node has the familiar User Message:</p> <p>&quot;<strong><em>pump fiber rej power in ham7 high, nominal 35e-3, align fiber pol on sqzt0</em></strong>&quot;</p> <p>It&#39;s been trending up the last 5 days when it was last touched up on 3/26 (alog<a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83570">83570</a>).&nbsp; Looks like it moved above 0.35 counts at 10am (local time) this morning.&nbsp; See attached.</p> <p>It&#39;s been a few minutes and one can see <u><strong>H1&#39;s range took a step down about 6Mpc after this SQZ drop</strong></u>.</p> SQZ <!--- Output file_1_83672 div --> <div id="file_1_83672" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83672 div --> </div> <!--- Output files_1_83672 div --> <div id="files_1_83672" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83672_20250331215639_Screenshot_2025-03-31_21-48-38.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83672_20250331215639_Screenshot_2025-03-31_21-48-38.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83672 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83672 corey.gray@ligo.org Mon, 31 Mar 2025 21:56:42 -0700 H1 SQZ H1 TCS - L5 Laser Beam Scan https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83669 <p>Author: matthewrichard.todd@ligo.org</p><p>Report ID: 83669</p><p>[M. Todd, C. Compton]</p> <hr /> <p>Camilla and I made several knife edge measurements of the L5 CO2 laser in the optics lab after she got back from her trip to Access. The beamwidth estimates are consistent with tests done by <a href="https://dcc.ligo.org/LIGO-T2500064">Gabriele and Camilla</a></p> <p>Measurements:</p> <ol> <li>&nbsp;20250327 - razorblade 16cm from laser aperature</li> <li>&nbsp;20250328 - razorblade 16cm from laser aperature (moved laterally to have more range)</li> <li>&nbsp;20250328v2 - razorblade 16cm from laser aperature</li> </ol> <hr /> <p><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83669_20250331171217_razor_blade_data_fits.png">Results</a>:</p> <p>Fits to both the numerical derivative and cumulative yield similar estimates of the beamwidth (1/e^2 radius) : <strong>around 1.3mm at 16cm from the aperature</strong> is consistent with the beam profiles done in Gabriele and Camilla&#39;s test, which estimated the beam waist to be around 1.2mm.</p> <!--- Output file_1_83669 div --> <div id="file_1_83669" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83669 div --> </div> <!--- Output files_1_83669 div --> <div id="files_1_83669" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83669_20250331170028_razor_blade_setup.jpg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83669_20250331170028_razor_blade_setup.jpg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83669_20250331171217_razor_blade_data_fits.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83669_20250331171217_razor_blade_data_fits.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83669 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83669 matthewrichard.todd@ligo.org Mon, 31 Mar 2025 17:12:28 -0700 H1 TCS H1 SEI - H1 ISI CPS Sensor Noise Spectra Check - Weekly FAMIS https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83671 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83671</p><p>Closes <a href="https://ligo-wa.accruent.net/LB_Request_UpdateElevate.asp?RequestID=26036">FAMIS 26036</a>. Last checked in <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83560">alog 83560</a>.</p> <p>Overall much quieter traces across all plots from last week&#39;s. Namely, the 7.6Hz to 9Hz elevated signals and peaks that Oli found seem to be gone. Plot attached.</p> SEI <!--- Output file_0_83671 div --> <div id="file_0_83671" class="commentHdr"> Non-image files attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_0_83671 div --> </div> <!--- Output files_0_83671 div --> <div id="files_0_83671" class="reportDetails"> <div class="uploadedImg"> <div class="uploadedFileType"><img src="https://alog.ligo-wa.caltech.edu/aLOG/images/pdf.gif" class="" /></div> <div class="uploadedFileName"><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83671_20250331163935_CPS_spectra_16%3A32-03_31_2025.pdf" target="blank">CPS_spectra_16:32-03_31_2025.pdf</a></div> </div> <!-- Output break div. --> <div class="break"></div> <!--- Close files_0_83671 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83671 ibrahim.abouelfettouh@ligo.org Mon, 31 Mar 2025 16:41:23 -0700 H1 SEI LHO General - Mon Eve Ops Transition https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83667 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83667</p><p><strong>TITLE:</strong> 03/31 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 155Mpc<br /> <strong>OUTGOING OPERATOR:</strong> Ibrahim<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: CALM<br /> &nbsp;&nbsp;&nbsp; Wind: 19mph Gusts, 12mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.03 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.17 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <p>Ibrahim is handing over an H1 which has been at Nominal Low Noise for 2+hrs (and a nicer range just under 160Mpc---woo woo Sqz commissioning work this morning).&nbsp; Ibrahim also schooled me on when wind at EY can cause us grief if it hits EY at a pesky angle---like it was at 2000utc today).</p> <p>Speaking of winds, it&#39;s continues to be generally below 25mph for the last 12hrs (but the forecast says it should drop after sunset.&nbsp; Secondary microseism had a small hump up between 10-22hrs ago and hovers just over the 50th percentile.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83667 corey.gray@ligo.org Mon, 31 Mar 2025 16:31:28 -0700 LHO General LHO General - OPS Day Shift Summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83668 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83668</p><p><strong>TITLE:</strong> 03/31 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 152Mpc<br /> <strong>INCOMING OPERATOR:</strong> Corey<br /> <strong>SHIFT SUMMARY:</strong></p> <p><strong>IFO is in NLN and OBSERVING as of 21:24 UTC</strong></p> <p>Overall calm final day of O4b with a successful comissioning session. Things of note:</p> <ul> <li><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83653">Lockloss 1: ETM Glitch Caused</a></li> <li><a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83663">Lockloss 2: Wind Caused</a> <ul> <li>We are more susceptible to wind coming in from the 40-70 degree range due to the one torn wind fence panel (attached screenshot). Elevated 0.3-1Hz and 0.03-0.1Hz EY ground motion was preventing locking for around 1 hr despite only 25-30 mph winds.</li> </ul> </li> <li>Hanford Site called around 12:30 PT to warn of planned sirens and drills though we were unlocked</li> </ul> <p><strong>LOG:</strong></p> <table> <tbody> <tr> <th>Start Time</th> <th>System</th> <th>Name</th> <th>Location</th> <th>Lazer_Haz</th> <th>Task</th> <th>Time End</th> </tr> <tr> <td>15:17</td> <td>FAC</td> <td>Nellie</td> <td>MX</td> <td>N</td> <td>Technical Cleaning</td> <td>16:12</td> </tr> <tr> <td>15:17</td> <td>FAC</td> <td>Kim</td> <td>MY</td> <td>N</td> <td>Technical Cleaning</td> <td>16:11</td> </tr> <tr> <td>17:10</td> <td>FAC</td> <td>Kim</td> <td>H2 Building</td> <td>N</td> <td>Technical Cleaning</td> <td>17:18</td> </tr> <tr> <td>17:43</td> <td>ISC</td> <td>Mayank, Siva, Keita</td> <td>OptLab</td> <td>Yes</td> <td>ISS Array work</td> <td>19:30</td> </tr> <tr> <td>21:11</td> <td>ISC</td> <td>Jennie, Mayank, Rahul, Keita, Sivananda</td> <td>Optics Lab</td> <td>Yes</td> <td>ISS Array Work</td> <td>00:11</td> </tr> </tbody> </table> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83668 ibrahim.abouelfettouh@ligo.org Mon, 31 Mar 2025 16:30:58 -0700 LHO General H1 SQZ - Comment to SQZ Data set with high NLG, then adjusted SRCL offset and FC detuning. https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83666 <p>Author: sheila.dwyer@ligo.org</p><p>Report ID: 83666</p><p>Here are some preliminary plots from Camilla&#39;s data set of different squeezing angles taken at an NLG of 58 with the SRCL offset at it&#39;s nominal -191 counts setting, which we believe is about 13 mrad SRC detuning.&nbsp;</p> <p>The first plot shows some assumptions that go into making this model, we start with an assumption about arm power, use the noise budget estimate of non quantum noise at 2kHz (which may be out of date now), and set the readout losses to fit the no squeezing data at 2.1-2.3kHz.&nbsp; Then subtract this quantum noise model without squeezing&nbsp; from the no squeezing data, and use that as an estimate of the non-quantum noise, which can be added to all of the quantum noise models for different squeezing angles to compare to the measurement. (second plot is a somewhat overwhelming plot of all this added for completeness).</p> <p>I&#39;ve set the phase noise to 0 based on <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83457">83457</a>.&nbsp; Using the level of sqz and anti-squeeze at 2.1-2.3 kHz, we infer that the NLG was 63 and the total efficency was 66.5%.&nbsp; Camilla measured the NLG to be 58, for 120uW circulating power, but in <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83370">83370</a> she measured 61-63 for 120uW.&nbsp;&nbsp; The third plot here shows the data that Camilla took with the LO loop unlocked, so that the squeezing angle is averaging and rotating freely.&nbsp; Using this and knowledge of the NLG, we should be able to infer the total squeezing <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331153358_eff_from_meansqz.png">efficiency as a function of frequency</a>. Doing the subtraction of non quantum noise increases the infered efficiency, (compare thick lines to thin), the two different values of NLG suggest rather different efficiencies. There is evidence that the efficiency frequency dependent, which could be caused by a number of effects. Below 200 Hz there is some excess noise in the mean sqz trace, as you can see <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331151820_displacement_spectra.png">here</a>, which causes the efficiency infered to be above 1.</p> <p>The next <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331155351_335kW_with_mid_sqz.png">two</a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331155405_335kW_with_pm10_sqz.png">plots</a> show the model broken into more readable plots, with the only thing I&#39;ve adjusted by hand being the SRC detuning.&nbsp; There is a discrepancy between the model + noise for the anti-squeezing and anti-squeezing +/-10 degrees traces without the filter cavity, which seems like it could be some excess noise that is similar for the different traces.&nbsp; This is similar to the discrepancy seen in the last plot in <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=82097">82097</a>, but it is larger in this higher NLG dataset.</p> <p>&nbsp;</p> <p>&nbsp;</p> <!--- Output file_1_83666 div --> <div id="file_1_83666" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83666 div --> </div> <!--- Output files_1_83666 div --> <div id="files_1_83666" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331151615_how_model_is_made.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83666_20250331151615_how_model_is_made.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331151820_displacement_spectra.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83666_20250331151820_displacement_spectra.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331153358_eff_from_meansqz.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83666_20250331153358_eff_from_meansqz.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331155351_335kW_with_mid_sqz.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83666_20250331155351_335kW_with_mid_sqz.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83666_20250331155405_335kW_with_pm10_sqz.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83666_20250331155405_335kW_with_pm10_sqz.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83666 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83666 sheila.dwyer@ligo.org Mon, 31 Mar 2025 15:58:55 -0700 H1 SQZ H1 SQZ - SQZ with SRCL offset at -306, FC detuing at -28 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83660 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83660</p><div> <p><em>Sheila, Camilla, Jennie</em></p> <p>This morning we changed SRCL offset from -191 to -306 and FC de-tuning from -34 to -28, as discussed in&nbsp; <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83570">83570</a>. Took some SQZ data here as we were interested if we could get FIS SQZ lower than No SQZ ~100Hz and below, Sheila&#39;s models (e.g.&nbsp;<a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83572">83572</a>) suggest we should but it looks like there&#39;s a low frequeceny noise source (in FIS not FDS) in our data sets preventing us from getting down to the modeled level of SQZ.</p> <p>Sheila turned OPO trans setpoint up from 80uW to 95uW to increase NLG from 11 to 19 (similar to what we had earlier in O4). Measured NLG with <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=76542">76542</a>. OPO gain left at -8. Turned off&nbsp; SQZ ASC.</p> <table border="1" cellpadding="1" cellspacing="1" style="width:600px"> <tbody> <tr> <td><strong>opo_grTrans_ setpoint_uW</strong></td> <td><strong>Amplified Max</strong></td> <td><strong>Amplified Min</strong></td> <td><strong>UnAmp</strong></td> <td><strong>Dark</strong></td> <td><strong>NLG (usual)</strong></td> <td><strong>NLG (maxmin)</strong></td> <td><strong>OPO Gain</strong></td> </tr> <tr> <td>95</td> <td>&nbsp;0.0176</td> <td>0.000279</td> <td>0.00002</td> <td>0.00094</td> <td>19.1</td> <td>20.0</td> <td>-8</td> </tr> <tr> <td>110</td> <td>0.03315</td> <td>0.000269</td> <td>0.000879</td> <td>-0.00002</td> <td>35</td> <td>&nbsp;</td> <td>-8</td> </tr> </tbody> </table> <div>&nbsp;</div> <div>Starting FC2 misaligned offsets in M1 TEST were 100 and 200, Sheila increased to 200 and 400. So that we know FC2 is really misaligned. Saw no difference at SQZ or ASQZ. So this low fruecny noise in FIS is not due to FC backscatter.</div> <div><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83660_20250331102900_NLG19_SRCLneg306_FIS.png">Data attached</a> and saved at <em>camilla.compton/Documents/sqz/templates/dtt/20250331_SRCL_neg306.xml</em><br /> &nbsp;</div> <table border="1" cellpadding="1" cellspacing="1" style="width:600px"> <tbody> <tr> <td><strong>Type</strong></td> <td><strong>Time (UTC)</strong></td> <td><strong>Angle</strong></td> <td><strong>Notes</strong></td> <td><strong>DTT Ref</strong></td> </tr> <tr> <td>No SQZ</td> <td>03/29</td> <td>N/A</td> <td>&nbsp;</td> <td>ref 0</td> </tr> <tr> <td>FIS SQZ</td> <td>&nbsp;</td> <td>171</td> <td>Angle tuned for FDS (maybe thermalized since)</td> <td>ref1</td> </tr> <tr> <td>FIS SQZ</td> <td>17:05:00</td> <td>154</td> <td>Ang tuned for FIS</td> <td>ref2</td> </tr> <tr> <td>FIS Mid(ish)</td> <td>17:15:00</td> <td>101</td> <td>Little better than no SQZ at 60Hz</td> <td>ref3</td> </tr> <tr> <td>FIS Mid(ish)</td> <td>&nbsp;</td> <td>92</td> <td>&nbsp;</td> <td>ref4</td> </tr> <tr> <td>ASQZ FIS</td> <td>&nbsp;</td> <td>68</td> <td>&nbsp;</td> <td>ref5</td> </tr> <tr> <td>ASQZ FIS -10deg</td> <td>17:24:00</td> <td>58</td> <td>&nbsp;</td> <td>ref6</td> </tr> <tr> <td>ASQZ FIS +10deg</td> <td>&nbsp;</td> <td>78</td> <td>&nbsp;</td> <td>ref7</td> </tr> <tr> <td>FIS Mid(ish)</td> <td>17:31:30</td> <td>115</td> <td>&nbsp;</td> <td>ref8</td> </tr> <tr> <td>FIS Mid(ish) other side</td> <td>17:43:00</td> <td>27</td> <td>&nbsp;</td> <td>ref9</td> </tr> <tr> <td>FIS Mid(ish)</td> <td>17:45:30</td> <td>82</td> <td>Check data doesn&#39;t include a glitch</td> <td>ref10</td> </tr> </tbody> </table> </div> <div>&nbsp;</div> <div>Then changed the <strong>SRCL de-tuning back to -191 </strong>(still in FIS so FC de-tuning doesn&#39;t matter). Comparison is<a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83660_20250331111744_SRCLneg306neg191.png"> attached.</a></div> <div>This<strong> SRCL offset change didn&#39;t effect the level of low frequency noise.</strong></div> <div>&nbsp;</div> <table border="1" cellpadding="1" cellspacing="1" style="width:600px"> <tbody> <tr> <td><strong>Type</strong></td> <td><strong>Time (UTC)</strong></td> <td><strong>Angle</strong></td> <td><strong>Notes</strong></td> <td><strong>DTT Ref</strong></td> </tr> <tr> <td>FIS ASQZ +10deg</td> <td>17:53:00</td> <td>82</td> <td>Plot seems similar with same ang, different SRCL offset</td> <td>ref 11</td> </tr> <tr> <td>FIS ASQZ</td> <td>17:56:00</td> <td>72</td> <td>&nbsp;</td> <td>ref12</td> </tr> <tr> <td>FIS ASQZ -10deg</td> <td>&nbsp;</td> <td>62</td> <td>&nbsp;</td> <td>ref13</td> </tr> <tr> <td>FIS Mid (ish)</td> <td>&nbsp;</td> <td>104</td> <td>Can see that rotation is a little different with SRCL de-tuning different but low freq noise level is the same.</td> <td>ref14</td> </tr> </tbody> </table> <div>&nbsp;</div> <div>Kept SRCL de-tuning at -191 but<strong> increased NLG to 35.&nbsp; </strong></div> <div>This was interesting for mid-SQZ values as the <strong>l</strong>evel of the low freq noise increased with the higher NLG but was the same at different SQZ angles (112 and 100deg).<a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83660_20250331143147_NLG_35vs19_SRCL191vs306.png"> Plot attached</a>. Compare grey and pink (NLG 35) to blue and brown (NLG19) &lt;70Hz. So <strong>the low frequency FIS noise is NLG dependent. </strong></div> <div>&nbsp;</div> <table border="1" cellpadding="1" cellspacing="1" style="width:600px"> <tbody> <tr> <td><strong>Type</strong></td> <td><strong>Time (UTC)</strong></td> <td><strong>Angle</strong></td> <td><strong>Notes</strong></td> <td><strong>DTT Ref</strong></td> </tr> <tr> <td>Mid SQZ</td> <td>&nbsp;</td> <td>112</td> <td>Interesting data here. Low freq noise higher than with NLG 19.</td> <td>ref 15</td> </tr> <tr> <td>ASQZ</td> <td>18:20:00</td> <td>70</td> <td>&nbsp;</td> <td>ref16</td> </tr> <tr> <td>MidSQZ</td> <td>18:22:30</td> <td>100</td> <td>&nbsp;</td> <td>ref17</td> </tr> </tbody> </table> <p>Sheila turned OPO trans back to 96uW so expect NLG to be 19 going into Observing, larger than normal but closer to the value uses before the last OPO crystal move. SQZ angle servo off and angle set back to 171. ADF left on.</p> <!--- Output file_1_83660 div --> <div id="file_1_83660" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83660 div --> </div> <!--- Output files_1_83660 div --> <div id="files_1_83660" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83660_20250331102900_NLG19_SRCLneg306_FIS.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83660_20250331102900_NLG19_SRCLneg306_FIS.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83660_20250331111744_SRCLneg306neg191.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83660_20250331111744_SRCLneg306neg191.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83660_20250331143147_NLG_35vs19_SRCL191vs306.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83660_20250331143147_NLG_35vs19_SRCL191vs306.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83660 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83660 camilla.compton@ligo.org Mon, 31 Mar 2025 14:33:38 -0700 H1 SQZ H1 SQZ - SQZ NLG increased from 11 to 19. ADF back on. https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83665 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83665</p><p>Today during commissioning we <strong>increased the SQZ NLG from 11 to 19</strong>, now the nominal OPO trans setpoint in sqzparams in 95uW. This was because before our last OPO crystal move <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=82134">82134</a>, the NLG was closer to 17-19.</p> <p>We also turned the ADF (322Hz line) back on, it had been off since March 27th <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83621">83621</a>, <strong><em>tagging DetChar. </em></strong></p> DetChar https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83665 camilla.compton@ligo.org Mon, 31 Mar 2025 14:24:57 -0700 H1 SQZ H1 SQZ - SQZ angle servo during thermalization https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83658 <p>Author: sheila.dwyer@ligo.org</p><p>Report ID: 83658</p><p>Sheila, Camilla</p> <p>The IFO was just relocking at the start of commissioning time today, so we set the ADF back on and the sqz angle servo on.&nbsp; This worked fine, with the phase shifter staying well within it&#39;s range (it stayed between 180 and 130 degrees, it&#39;s range is 0 -270 degrees).&nbsp;</p> <p>In the attached screenshot the vertical cursors are both at 25 minutes into the lock.&nbsp; You can see that the SQZ BLRMS and the range behave differently with the servo on, but in both cases they start with a low range and move up slowly.&nbsp; We think that the set point of the squeezing angle servo wasn&#39;t set ideally for this time.</p> <p>In the second screenshot you can see that I changed the SRCL offset and the servo responded to it, taking about 3 minutes to settle.</p> <!--- Output file_1_83658 div --> <div id="file_1_83658" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83658 div --> </div> <!--- Output files_1_83658 div --> <div id="files_1_83658" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83658_20250331100355_SQZ_ANG_servo_on_vs_off.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83658_20250331100355_SQZ_ANG_servo_on_vs_off.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83658_20250331142210_SQZ_ANG_servo_SRCL_offset.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83658_20250331142210_SQZ_ANG_servo_SRCL_offset.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83658 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83658 sheila.dwyer@ligo.org Mon, 31 Mar 2025 14:23:47 -0700 H1 SQZ H1 ISC - Future Beamdump placement behind HAM1 RM3/PM1 tip-tilt https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83664 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83664</p><p><em>Rahul, Betsy, Camilla</em></p> <p>Attached are some photos of the proposed location of the beamdump that will be placed behind the HAM1 RM3 / PM1 tip-tilt with new&nbsp;<a href="https://dcc.ligo.org/LIGO-D2500101">D2500101</a>&nbsp;attached to existing Tip-Tilt DSUB Bracket Holder&nbsp;<a href="https://dcc.ligo.org/LIGO-D1101430" title="LIGO-D1101430-v1">D1101430</a>. In reality the beamdump&nbsp;will be placed at the mirror image of the photos as the HAM1&nbsp;beam will be coming the opposite incoming angle.</p> <p>The Beamdump is made from:&nbsp;</p> <ul> <li>QTY2 D1800140-02 (Beam Dump)</li> <li>QTY1 D1000972 (V-holder)</li> <li>QTY2&nbsp;D1100705 (PEEK Set screw #8-32 x 3/16)</li> <li>QTY1 C-2010-A 1/4-20 x 0.63&quot; SHCS, Silver plated</li> </ul> SUS <!--- Output file_1_83664 div --> <div id="file_1_83664" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83664 div --> </div> <!--- Output files_1_83664 div --> <div id="files_1_83664" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83664_20250331133015_IMG_1581.jpeg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83664_20250331133015_IMG_1581.jpeg" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83664_20250331133024_IMG_1582.jpeg" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83664_20250331133024_IMG_1582.jpeg" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83664 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83664 camilla.compton@ligo.org Mon, 31 Mar 2025 13:35:19 -0700 H1 ISC H1 General - Lockloss 19:29 UTC https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83663 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83663</p><p>Lockloss right after we got back to OBSERVING with good range.</p> <p>First impression of cause is that it might be wind related since:</p> <ul> <li>35 mph gusts are coming through</li> <li>EY primary microseism has been steadily rising</li> <li>There was visible instability in ASC prior to lockloss</li> </ul> <p>Relocking again now.</p> Lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83663 ibrahim.abouelfettouh@ligo.org Mon, 31 Mar 2025 12:35:23 -0700 H1 General H1 SUS - Comment to cross-coupling and reciprocal plants https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83662 <p>Author: jeffrey.kissel@ligo.org</p><p>Report ID: 83662</p>@Brian, Edgard -- I wonder if some of this ~10-20% mismatch in OSEM calibration is that we approximate the <a href="https://dcc.ligo.org/LIGO-D0901284">D0901284-v4</a> sat amp whitening stage with a compensating filter of z:p = (10:0.4) Hz? (I got on this idea thru modeling the *improvement* to the whitening stage that is already in play at LLO and will be incoming into LHO this summer; <a href="https://dcc.ligo.org/LIGO-E2400330">E2400330</a>) If you math out the frequency response from the circuit diagram and component values, the response is defined by <font face="courier"> % Vo R180 % ---- = (-1) * -------------------------------- % Vi Z_{in}^{upper} || Z_{in}^{lower} % % R181 (1 + s * (R180 + R182) * C_total) % = (-1) * ---- * -------------------------------- % R182 (1 + s * (R180) * C_total)</font> So for the D0901284-v4 values of <font face="courier"> R180 = 750; R182 = 20e3; C150 = 10e-6; C151 = 10e-6; R181 = 20e3; </font> that creates a frequency response of <font face="courier"> f.zero = 1/(2*pi*(R180+R182)*C_total) = 0.3835 [Hz]; f.pole = 1/(2*pi*R180*C_total) = 10.6103 [Hz]; </font> I attach a plot that shows the ratio of the this "circuit component value ideal" response to approximate response, and <b>the response ratio hits 7.5% by 10 Hz and ~11% by 100 Hz.</b> This is, of course for one OSEM channel&#39;s signal chain. I haven&#39;t modeled how this systematic error in compensation would stack up with linear combinations of slight variants of this response given component value precision/accuracy, but ... ... I also am quite confident that no one really wants to go through an measure and fit the zero and pole of every OSEM channel&#39;s sat amp frequency response, so maybe you&#39;re doing the right thing by "just" measuring it with this technique and compensating for it in the SENSALIGN matrix. Or at least measure one sat amp box&#39;s worth, and see how consistent the four channels are and whether they&#39;re closer to 0.4:10 Hz or 0.3835:10.6103 Hz. Anyways -- I thought it might be useful to be aware of the many steps along the way that we&#39;ve been lazy about the details in calibrating the OSEMs, and this would be one way to "fix it in hardware." CSWG, SUS <!--- Output file_0_83662 div --> <div id="file_0_83662" class="commentHdr"> Non-image files attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_0_83662 div --> </div> <!--- Output files_0_83662 div --> <div id="files_0_83662" class="reportDetails"> <div class="uploadedImg"> <div class="uploadedFileType"><img src="https://alog.ligo-wa.caltech.edu/aLOG/images/pdf.gif" class="" /></div> <div class="uploadedFileName"><a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83662_20250331115238_D0901284-v4_Whitening_compensationerror.pdf" target="blank">D0901284-v4_Whitening_compensationerror.pdf</a></div> </div> <!-- Output break div. --> <div class="break"></div> <!--- Close files_0_83662 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83662 jeffrey.kissel@ligo.org Mon, 31 Mar 2025 12:03:33 -0700 H1 SUS LHO VE - Mon CP1 Fill https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83661 <p>Author: david.barker@ligo.org</p><p>Report ID: 83661</p><p><strong>Mon Mar 31 10:09:31 2025 INFO: Fill completed in 9min 28secs</strong></p> <p>&nbsp;</p> <!--- Output file_1_83661 div --> <div id="file_1_83661" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83661 div --> </div> <!--- Output files_1_83661 div --> <div id="files_1_83661" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83661_20250331114333_CP1-1085.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83661_20250331114333_CP1-1085.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83661 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83661 david.barker@ligo.org Mon, 31 Mar 2025 11:43:36 -0700 LHO VE H1 PSL - PSL 10-Day Trends https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83659 <p>Author: ryan.short@ligo.org</p><p>Report ID: 83659</p><p>FAMIS <a href="https://ligo-wa.accruent.net/LB_Request_UpdateElevate.asp?InstallID=2&amp;RequestID=31079">31079</a></p> <p>The temperature increase <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83520">noted last week</a> seems to have come back to normal for the most part after a few days.</p> <p>Jason&#39;s <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83616">RefCav alignment tweak</a> 3 days ago is clearly seen and level has stayed relatively stable since.</p> <p>PMC Refl hasn&#39;t been rising, but perhaps has gotten noisier starting a few days ago.</p> <!--- Output file_1_83659 div --> <div id="file_1_83659" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83659 div --> </div> <!--- Output files_1_83659 div --> <div id="files_1_83659" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83659_20250331101007_WeeklyCooling_03312025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83659_20250331101007_WeeklyCooling_03312025.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83659_20250331101009_WeeklyEnv_03312025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83659_20250331101009_WeeklyEnv_03312025.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83659_20250331101012_WeeklyLaser_03312025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83659_20250331101012_WeeklyLaser_03312025.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83659_20250331101014_WeeklyStabilization_03312025.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83659_20250331101014_WeeklyStabilization_03312025.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83659 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83659 ryan.short@ligo.org Mon, 31 Mar 2025 10:10:32 -0700 H1 PSL H1 General - Comment to Lockloss 14:39 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83657 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83657</p><p>Appears to have been an <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83657_20250331091550_Screenshot_2025-03-31_09-15-42.png">ETMX glitch</a></p> <!--- Output file_1_83657 div --> <div id="file_1_83657" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83657 div --> </div> <!--- Output files_1_83657 div --> <div id="files_1_83657" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83657_20250331091550_Screenshot_2025-03-31_09-15-42.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83657_20250331091550_Screenshot_2025-03-31_09-15-42.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83657 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83657 ryan.crouch@ligo.org Mon, 31 Mar 2025 09:16:01 -0700 H1 General LHO General - Comment to OPS Day Shift Start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83656 <p>Author: oli.patane@ligo.org</p><p>Report ID: 83656</p><p>Confirmed not the PIs for either range drop (<a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83656_20250331085931_2025-03-31_085652.png">drop1</a>, <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83656_20250331085937_2025-03-31_085638.png">drop2</a>). There was a small drop in range a few minutes before the second range drop around the same time as PI31 had a small ringup, but zooming in, the ringup happened multiple minutes before and so doesn&#39;t account for that quick drop either(<a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83656_20250331090104_2025-03-31_090056.png">ndscope3</a>).</p> SUS <!--- Output file_1_83656 div --> <div id="file_1_83656" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83656 div --> </div> <!--- Output files_1_83656 div --> <div id="files_1_83656" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83656_20250331085931_2025-03-31_085652.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83656_20250331085931_2025-03-31_085652.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83656_20250331085937_2025-03-31_085638.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83656_20250331085937_2025-03-31_085638.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83656_20250331090104_2025-03-31_090056.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83656_20250331090104_2025-03-31_090056.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83656 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83656 oli.patane@ligo.org Mon, 31 Mar 2025 09:01:14 -0700 LHO General LHO General - Comment to OPS Day Shift Start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83654 <p>Author: camilla.compton@ligo.org</p><p>Report ID: 83654</p><p><em>Ibrahim, Oli, Camilla</em></p> <p>We had two 30+ minute range drops last night, <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83654_20250331084451_Range_drops.png">plot attached</a>. Looks to be mainly under 60Hz from the OMC BLRMs,<a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83654_20250331085857_under60Hz.png"> plot</a>.</p> <p>Doesn&#39;t appear to be sqz, EX ground motion <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83233">83233</a>, or CO2 ISS channel&nbsp;<a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=82728">82728</a> related. Oli also checked this wasn&#39;t PI related <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=82944">82944</a>.</p> DetChar, DetChar-Request <!--- Output file_1_83654 div --> <div id="file_1_83654" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83654 div --> </div> <!--- Output files_1_83654 div --> <div id="files_1_83654" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83654_20250331084451_Range_drops.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83654_20250331084451_Range_drops.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83654_20250331085857_under60Hz.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83654_20250331085857_under60Hz.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83654 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83654 camilla.compton@ligo.org Mon, 31 Mar 2025 08:59:14 -0700 LHO General H1 ISC - POP 18 gains restored to their previous normal gain of 2 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83655 <p>Author: sheila.dwyer@ligo.org</p><p>Report ID: 83655</p><p>Last week Corey changed the gains of POP18 because of difficulties locking DRMI.&nbsp; <a href="https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83540">83540</a>&nbsp; To avoid having the histories of these POP18 build ups being confusing, I&#39;ve moved the gain of 2 into the trigger matrix, and in sdf set the locking gains back to 2.&nbsp; (These gains were changed from 1 to 2 when the 50/50 splitter was added to the POP path.)&nbsp;</p> <p>I&#39;ve edited line 238 in ISC_DRMI to set the trigger matrix element to 2.</p> <!--- Output file_1_83655 div --> <div id="file_1_83655" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83655 div --> </div> <!--- Output files_1_83655 div --> <div id="files_1_83655" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83655_20250331084509_POP18_back_to_normal.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83655_20250331084509_POP18_back_to_normal.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83655 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83655 sheila.dwyer@ligo.org Mon, 31 Mar 2025 08:46:27 -0700 H1 ISC H1 General - Lockloss 14:39 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83653 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83653</p><p>Lockloss after 2 minute lock before reaching observing. No immediate apparent causes.</p> Lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83653 ibrahim.abouelfettouh@ligo.org Mon, 31 Mar 2025 07:41:51 -0700 H1 General LHO General - OPS Day Shift Start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83652 <p>Author: ibrahim.abouelfettouh@ligo.org</p><p>Report ID: 83652</p><p><strong>TITLE:</strong> 03/31 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Lock Acquisition<br /> <strong>OUTGOING OPERATOR:</strong> Ryan S<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: CALM<br /> &nbsp;&nbsp;&nbsp; Wind: 28mph Gusts, 23mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.06 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.21 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <p><strong>IFO is LOCKING in LASER_NOISE_SUPPRESSION</strong></p> <p>Today we have planned comissioning from 8:30 to 11:30 local time.</p> <p>The last lockloss seems to have been caused by wind and elevated microseism, though neither seem high enough to have necessarily caused a lockloss.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83652 ibrahim.abouelfettouh@ligo.org Mon, 31 Mar 2025 07:36:02 -0700 LHO General H1 CDS - Comment to VACSTAT alarm on BSC3 sensor glitch https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83651 <p>Author: david.barker@ligo.org</p><p>Report ID: 83651</p><p>Another BSC3 VACSTAT glitch at 22:40:58. Service was restarted at 22:27 to clear.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83651 david.barker@ligo.org Sun, 30 Mar 2025 22:48:46 -0700 H1 CDS LHO General - Sun EVE Ops Summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83649 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83649</p><p><strong>TITLE:</strong> 03/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 154Mpc<br /> <strong>INCOMING OPERATOR:</strong> Ryan S<br /> <strong>SHIFT SUMMARY:</strong></p> <p>Nice shift with H1 running decently even as the weather turned a bit in the evening (w/ 30+mph winds and rain as the sun set....but then calmed down toward the end of the shift).&nbsp; At shift&#39;s end, H1&#39;s current lock is over 7hrs (with one GW-candidate).<br /> <strong>LOG:</strong></p> <ul> <li>0135 Superevent <a href="https://gracedb.ligo.org/superevents/S250331o/">S250331o</a></li> </ul> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83649 corey.gray@ligo.org Sun, 30 Mar 2025 21:59:28 -0700 LHO General H1 CDS - VACSTAT alarm on BSC3 sensor glitch https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83650 <p>Author: david.barker@ligo.org</p><p>Report ID: 83650</p><p>We had a BSC3 sensor glitch at 16:39:16 resulting in a single VACSTAT alarm. I restarted the service at 16:50 to clear this alarm.</p> <p>I also set the FMCS Reverse Osmosis alarm into silent mode so it will only email and not text for the next 24 hours.</p> <p>Bypass will expire:<br /> Mon Mar 31 04:57:28 PM PDT 2025<br /> For channel(s):<br /> &nbsp; &nbsp; H0:FMC-CS_WS_RO_ALARM<br /> &nbsp;</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83650 david.barker@ligo.org Sun, 30 Mar 2025 17:00:54 -0700 H1 CDS LHO FMCS - OPS Sunday DAY shift summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83642 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83642</p><p><strong>TITLE:</strong> 03/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 153Mpc<br /> <strong>INCOMING OPERATOR:</strong> Corey<br /> <strong>SHIFT SUMMARY:</strong> We&#39;ve been locked for 1.5 hours. The ground has been doing the tectonic shuffle this morning with a group&nbsp;of <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83642_20250330111717_Screenshot_2025-03-30_11-17-07.png">earthquakes</a> and aftershocks from Tonga, 7.0, 4.8, 6.1, 4.9, 5.8...<br /> <strong>LOG:</strong> No log.</p> <p>The porta potty outside the FCES has also been knocked over, and OSB receiving is blocked by tumbleweeds. (<em><strong>Tagging FMCS</strong></em>)</p> <ul> <li>12:31:01 Earthquake mode activated</li> <li>12:31:23 UTC 7.0 from Tonga arrived, lockloss <ul> <li>15:50 UTC 6.1 from Tonga arrived</li> <li>16:55 UTC Initial alignment</li> <li>18:16 UTC Observing</li> </ul> </li> <li><a href="https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1427402068">20:34 UTC lockloss</a> from an ETMX glitch <ul> <li>22:55 UTC Observing, the SQZer seemed to lock at a slightly worse spot than the previous locks</li> <li>22:30 another EQ from Tonga (5.2) came through but we survived</li> </ul> </li> </ul> <!--- Output file_1_83642 div --> <div id="file_1_83642" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83642 div --> </div> <!--- Output files_1_83642 div --> <div id="files_1_83642" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83642_20250330111717_Screenshot_2025-03-30_11-17-07.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83642_20250330111717_Screenshot_2025-03-30_11-17-07.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83642 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83642 ryan.crouch@ligo.org Sun, 30 Mar 2025 16:31:40 -0700 LHO FMCS LHO General - Sun EVE Ops Transition https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83648 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83648</p><p><strong>TITLE:</strong> 03/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 152Mpc<br /> <strong>OUTGOING OPERATOR:</strong> Ryan C<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: CALM<br /> &nbsp;&nbsp;&nbsp; Wind: 16mph Gusts, 11mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.03 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.15 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <p>H1 has been at NLN for 1.5+hrs.&nbsp;</p> <p>There is a CDS Alarm for the RO (reverse osmosis) system.&nbsp; Happened to phone Tyler earlier today with water questions and he mentioned he turned off both RO skids this morning (@943amPDT).</p> <p>Environmental noise wise, secondary &micro;seism is lower than 24hrs (looks like it&#39;s flattened out squarely at the 50th percentile&nbsp; about 7hrs ago).&nbsp; Winds are a little are a touch more breezy than yesterday, but still well under 20mph.</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83648 corey.gray@ligo.org Sun, 30 Mar 2025 16:25:42 -0700 LHO General H1 General - Comment to 20:34 UTC Lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83646 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83646</p><p>21:55 UTC observing</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83646 ryan.crouch@ligo.org Sun, 30 Mar 2025 15:01:26 -0700 H1 General H1 General - 20:34 UTC Lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83645 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83645</p><p><a href="https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1427402068">20:34 UTC lockloss</a>, it appears to have been from an <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83645_20250330134115_Screenshot_2025-03-30_13-41-10.png">ETMX glitch</a></p> Lockloss <!--- Output file_1_83645 div --> <div id="file_1_83645" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83645 div --> </div> <!--- Output files_1_83645 div --> <div id="files_1_83645" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83645_20250330134115_Screenshot_2025-03-30_13-41-10.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83645_20250330134115_Screenshot_2025-03-30_13-41-10.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83645 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83645 ryan.crouch@ligo.org Sun, 30 Mar 2025 13:42:48 -0700 H1 General H1 General - Comment to OPS Sunday DAY shift start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83644 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83644</p><p>18:16 UTC Observing</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83644 ryan.crouch@ligo.org Sun, 30 Mar 2025 11:16:44 -0700 H1 General LHO VE - Sun CP1 Fill https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83643 <p>Author: david.barker@ligo.org</p><p>Report ID: 83643</p><p><strong>Sun Mar 30 10:11:04 2025 INFO: Fill completed in 11min 1secs</strong></p> <p>TC-B slightly noisy.</p> <!--- Output file_1_83643 div --> <div id="file_1_83643" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83643 div --> </div> <!--- Output files_1_83643 div --> <div id="files_1_83643" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83643_20250330102011_CP1-1084.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83643_20250330102011_CP1-1084.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83643 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83643 david.barker@ligo.org Sun, 30 Mar 2025 10:20:14 -0700 LHO VE H1 General - OPS Sunday DAY shift start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83641 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83641</p><p><strong>TITLE:</strong> 03/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Earthquake<br /> <strong>OUTGOING OPERATOR:</strong> Ryan S<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: EARTHQUAKE<br /> &nbsp;&nbsp;&nbsp; Wind: 8mph Gusts, 5mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.51 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.16 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <ul> <li>12:31 UTC lockloss (EQ)</li> <li>We&#39;re currently down from a 7.0 from Tonga, probably another two or three hours till the ground motion subsides enough for locking</li> <li>SUS OPO and FC2 were tripped along with HAMs 2,3,4,5,7,8&#39;s ISIs</li> </ul> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83641 ryan.crouch@ligo.org Sun, 30 Mar 2025 07:30:01 -0700 H1 General LHO General - Sat EVE Ops Summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83639 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83639</p><p><strong>TITLE:</strong> 03/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 152Mpc<br /> <strong>INCOMING OPERATOR:</strong> Ryan S<br /> <strong>SHIFT SUMMARY:</strong></p> <p>Quiet shift with H1 locked the whole time (currently at about 7.5hrs).&nbsp; Squeezed in a successful Calibration while L1 was down.&nbsp; Secondary microseism continues downward trend from the last 24+hrs (touching 50th percentile line).&nbsp; Winds touched ~20mph, but have mostly meen much calmer.<br /> <strong>LOG:</strong></p> <ul> <li>0127-0157 Saturday Calibration measurement</li> </ul> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83639 corey.gray@ligo.org Sat, 29 Mar 2025 21:59:37 -0700 LHO General H1 CAL - Saturday H1 Calibration Measurement (broadband headless + simulines) https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83640 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83640</p><p>After noticing that L1 was down, started running Calibration measurments since H1 was now thermalized.</p> <p><strong>Measurement NOTES:</strong></p> <ul> <li>Following instructions (<a href="https://cdswiki.ligo-wa.caltech.edu/wiki/TakingCalibrationMeasurements">link</a>)</li> <li>H1 at NLN for for over 3hrs54min</li> <li>Calibration_Monitor medm screenshot is attached</li> <li>0127- 0157utc Out of Observing for CALIBRATION</li> <li>&nbsp;Broadband measurement started at 1427333255 <ul> <li>Measurement at:&nbsp; /ligo/groups/cal/H1/measurements/PCALY2DARM_BB/PCALY2DARM_BB_20250330T012727Z.xml</li> </ul> </li> <li>&nbsp;Simullines measurement <ul> <li>gps START time:&nbsp;&nbsp;1427333622.245412</li> <li>gps STOP time:&nbsp;1427335020.945731</li> <li>&nbsp;File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20250330T013325Z.hdf5</li> <li>File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20250330T013325Z.hdf5</li> <li>File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20250330T013325Z.hdf5</li> <li>File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20250330T013325Z.hdf5</li> <li>File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20250330T013325Z.hdf5</li> </ul> </li> <li>Then ISC_LOCK was taken back to NLN for observing</li> </ul> CAL <!--- Output file_1_83640 div --> <div id="file_1_83640" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83640 div --> </div> <!--- Output files_1_83640 div --> <div id="files_1_83640" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83640_20250329182823_Screenshot_2025-03-29_18-26-22.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83640_20250329182823_Screenshot_2025-03-29_18-26-22.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83640 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83640 corey.gray@ligo.org Sat, 29 Mar 2025 18:58:23 -0700 H1 CAL LHO General - Sat EVE Ops Transition https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83638 <p>Author: corey.gray@ligo.org</p><p>Report ID: 83638</p><p><strong>TITLE:</strong> 03/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 152Mpc<br /> <strong>OUTGOING OPERATOR:</strong> Ryan C<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: CALM<br /> &nbsp;&nbsp;&nbsp; Wind: 10mph Gusts, 7mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.02 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.19 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <p>Ryan C handed over an Observing H1.&nbsp; Have had (5) locklosses from Observing over last 24hrs with only 2 of those from last night being due to wind (winds are much lower this evening and secondary &micro;seism continues to plummet).</p> <p>Perhaps if L1/V1 go down any time after an hr from now (after 3hr thermalization), I could take the opportunity to run a calibration.&nbsp;</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83638 corey.gray@ligo.org Sat, 29 Mar 2025 16:23:12 -0700 LHO General H1 General - OPS Saturday day shift summary https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83634 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83634</p><p><strong>TITLE:</strong> 03/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 156Mpc<br /> <strong>INCOMING OPERATOR:</strong> Corey<br /> <strong>SHIFT SUMMARY: </strong> I was able to get a <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83634_20250329122725_Screenshot_2025-03-29_12-27-14.png">coherence</a> measurement during the first lock. We&#39;ve relocked 3 times this shift, no issues relocking.<br /> <strong>LOG:</strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</p> <table> <tbody> <tr> <th>Start Time</th> <th>System</th> <th>Name</th> <th>Location</th> <th>Lazer_Haz</th> <th>Task</th> <th>Time End</th> </tr> <tr> <td>18:50</td> <td>EPO</td> <td>Janos</td> <td>Overpass, Yarm</td> <td>N</td> <td>Tour</td> <td>19:46</td> </tr> </tbody> </table> <p>I&#39;ve been damping ITMY modes 5/6 with half the nominal gain (0.005) during the second/third lock as I wasn&#39;t totally convinced the damping was going well before with the higher gain. 3/4 monitors were going down but the DARM line height on DTT wasn&#39;t really changing. TJ said he had success with this lower gain the other day as well. I put the new damping settings for ETMY mode1 into lscparams.</p> <ul> <li>14:17 UTC observing <ul> <li><a href="https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1427307193">18:12 UTC</a> lockloss</li> </ul> </li> <li>19:29 UTC observing <ul> <li><a href="https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1427314993">20:22 UTC</a> lockloss, <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83634_20250329133123_Screenshot_2025-03-29_13-31-10.png">DARM wiggle before the LL</a>?</li> </ul> </li> <li>21:36 UTC observing</li> </ul> <p>&nbsp;</p> <!--- Output file_1_83634 div --> <div id="file_1_83634" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83634 div --> </div> <!--- Output files_1_83634 div --> <div id="files_1_83634" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83634_20250329122725_Screenshot_2025-03-29_12-27-14.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83634_20250329122725_Screenshot_2025-03-29_12-27-14.png" class="outputImg" /></a> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83634_20250329133123_Screenshot_2025-03-29_13-31-10.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83634_20250329133123_Screenshot_2025-03-29_13-31-10.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83634 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83634 ryan.crouch@ligo.org Sat, 29 Mar 2025 16:01:55 -0700 H1 General H1 General - Comment to 20:22 UTC lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83637 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83637</p><p>21:36 UTC observing</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83637 ryan.crouch@ligo.org Sat, 29 Mar 2025 14:40:17 -0700 H1 General H1 General - 20:22 UTC lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83636 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83636</p><p><a href="https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1427314993">20:22 UTC</a> lockloss</p> Lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83636 ryan.crouch@ligo.org Sat, 29 Mar 2025 13:24:41 -0700 H1 General H1 General - Comment to 18:13 UTC lockloss (4 hour lock) https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83635 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83635</p><p>19:29 UTC observing</p> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83635 ryan.crouch@ligo.org Sat, 29 Mar 2025 12:29:52 -0700 H1 General H1 General - 18:13 UTC lockloss (4 hour lock) https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83633 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83633</p><p><a href="https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1427307193">18:13 UTC</a> lockloss right before the scheduled calibration suite, sad</p> Lockloss https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83633 ryan.crouch@ligo.org Sat, 29 Mar 2025 11:14:32 -0700 H1 General LHO VE - Sat CP1 Fill https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83632 <p>Author: david.barker@ligo.org</p><p>Report ID: 83632</p><p><strong>Sat Mar 29 10:13:20 2025 INFO: Fill completed in 13min 16secs</strong></p> <p>TC-B was quite noisy during the fill today.</p> <!--- Output file_1_83632 div --> <div id="file_1_83632" class="commentHdr"> Images attached to this report <!-- Output break div. --> <div class="break"></div> <!--- Close file_1_83632 div --> </div> <!--- Output files_1_83632 div --> <div id="files_1_83632" class="reportDetails"> <a href="https://alog.ligo-wa.caltech.edu/aLOG/uploads/83632_20250329101842_CP1-1083.png" target="blank"><img src="https://alog.ligo-wa.caltech.edu/aLOG/uploads/tn/tn_83632_20250329101842_CP1-1083.png" class="outputImg" /></a> <!-- Output break div. --> <div class="break"></div> <!--- Close files_1_83632 div --> </div> <!-- Output break div. --> <div class="break"></div> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83632 david.barker@ligo.org Sat, 29 Mar 2025 10:18:47 -0700 LHO VE H1 General - OPS Saturday day shift start https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83631 <p>Author: ryan.crouch@ligo.org</p><p>Report ID: 83631</p><p><strong>TITLE:</strong> 03/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC<br /> <strong>STATE of H1:</strong> Observing at 141Mpc<br /> <strong>OUTGOING OPERATOR:</strong> Ryan S<br /> <strong>CURRENT ENVIRONMENT:</strong><br /> &nbsp;&nbsp;&nbsp; SEI_ENV state: CALM<br /> &nbsp;&nbsp;&nbsp; Wind: 4mph Gusts, 1mph 3min avg<br /> &nbsp;&nbsp;&nbsp; Primary useism: 0.02 &mu;m/s<br /> &nbsp;&nbsp;&nbsp; Secondary useism: 0.26 &mu;m/s<br /> <strong>QUICK SUMMARY:</strong></p> <ul> <li>14:17 UTC observing</li> <li>The wind is much lower</li> <li>Secondary microseism is decreasing</li> </ul> https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=83631 ryan.crouch@ligo.org Sat, 29 Mar 2025 07:29:48 -0700 H1 General