This afternoon I
- maked the First Contact spray solution
- brushed up on the spray procedure
- staged supplies near door
- donned the PPE
- aligned the cone to seal onto the ITMY HR surface
- sprayed the ITMY HR
- removed the cone.
Tomorrow I will finish reinforcing the outer ring of the coating and add the pull tab.
Betsy, Travis, bit of Kissel, Bubba/Tyler/Mark
Already eluded to in previous alogs, but HAM4 has been closed. The usual steps were taken:
- ~9:30am Lay/mount 3' witness wafers
- Wipe table and ISI reachable surfaces
- Pull FC previous painted on SR2 and HWS DCBSx and DCBSy
- Unlock SR2 SUS and lock down nuts
- Checklist E1201035 checked throughout this to check for tools, dust counts, etc.
10:50am Dust counts at S door during this activity with Travis and I near the door were:
0.3u 80
0.5u 40
0.7u 0
1.0u 30
- Run quick 6 DOFs of SUS (some troubleshooting needed - cables recheck by Fil OK, BIO state needed switching, vertical stops needed resetting since apparently rattled down during 5mm slide, TFs finally pass)
- Unlock ISI
- SEI discuss and quick medm check ISI, pass
- Hunt down the Signoff sheet on DCC, then found it to be out of date, spent 30mins hunting people down - people either weren't the appropriate people to sign, or were on travel. Vern is updating sheet and reprinting for future chambers.
- Doors attached ~12-1.
TITLE: 12/07 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:
LOG:
16:00 LVEA is LASER SAFE
16:01 Christina and Karen are in the LVEA
16:27 Tyler and Mark out to MY
16:35 Fil and Jeff B out to HAM2 for ground loop checking/repair
16:36 Terry going into the squeezer bay
16:51 Betsy out to HAM 4/5 area to prepare for putting doors back on.
16:52 Chandra out to GV4. Will possibly be using the W Crane
16:54 Tyler and Mark are back
17:01 Travis out to HAM4 area for door closure
17:07 Peter out to LVEA
17:08 Dr Stefan Balmer on site
17:09 Christina and Karen out of the LVEA
17:13 Peter out
17:28 Chandra out (temporarily)
17:34 Mark and Tyler going into LVEA to crane HAM doors to a staging area for afternoon installation
17:41 Jim and Jeff K out to HAM 2 to B&K hammer
17:46 Chandra into LVEA
17:51 TJ heading out to LVEA/TCSX.
17:54 Fil and Jeff finished with HAM2. Fil moving to ITMs to continue ground loop checks.
17:57 Re-aligned/damped all HAM2 suspensions
17:59 Bubba into LVEA for crane/door work
18:06 Peter and Umakant out to PSL enclosure
18:15 printed out dign-off sheet for door activity for Betsy and co.
18:29 Richard out to LVEA
18:20 TJ out
18:21 N in to squeezer bay
10:26 Fil and TJ into the LVEA
10:35 Richard out
10:51 Mark and Tytler out
18:59 Took HAM5 suspensions to SAFE/UNDAMPED for Fil and Jeff B ground loop checking
19:03 Dave B and Arnab going to out buildings
19:07 Mark and Tyler back into LVEA
19:08 Brijesh out to Output arm area to observe
19:10 Vern out to LVEA (no-op)
19:14 Siddesh out to LVEA(no-op?)
19:15 Terry out of LVEA (no-op)
19:24 Mark in and out of LVEA to deliver canned air to Jeff K at HAM2
19:32 Dave B and Arnab at EY
19:32 Richard out to LVEA
19:38 Richard out
19:45 Betsy out
19:49 Travis out
19:52 Jason and TJ are out
19:57 Dave B and co. checked in from MX
19:57 Peter and Umakant out
19:59 Jeff K and Jim out
20:08 Mark, Tyler, Bubba, and Siddesh out for lunch
20:09 HAM4 N Door tacked on
20:13 Dave B checked in from EX
20:30 Fil out
20:34 Jeff B out
20:36 Dave and Arnab back
20:39 N out for lunch (no-op)
20:52 Travis and Jeff back out
20:59 Hugh out to HAM5 for ISI balancing
13:00 Vent Meeting
21:05 Tyler, Mark and Bubba out to LVEA
22:07 Sheila into Optics lab
21:10 TJ and Jason back out to LVEA
21:20 Fil out to LVEA
21:24 Jeff B in with Fil
21:39 Gerardo into LVEA (no-op)
21:53 Betsy into LVEA
21:54 N into squeezer bay
22:07 Jeff B and Fil out
22:09 N card showed undeclared
22:13 Bubba out
22:19 Gerardo out
22:24 Richard into LVEA
22:30 Richard out
22:39 Jeff K out
22:56 Chandra into LVEA
22:57 Tyler and Mark out
22:58 Terry back out to squeezer bay
23:14 Cheryl out to HAM2 to investigate IM3
23:15 Jeff K into LVEA to take pics at HAM3
22:17 Jeff K out
23:25 Dave B out to HAM5 to deliver a laptop to Hugh
23:39 Bubba and Bailey into the LVEA
23:47 Jason and TJ out
23:49 Chandra out
23:58 Cheryl out
Pumping HAM 4 annuli with aux cart #5 and hung turbo. Started at 3:39pm local. After 10 minutes of pumping, CC gauge reads 4.3e-4 Torr.
I spoke with the manufacture of the failed water heater this morning. The factory rep indicated to me that if the failure is with the heat exchanger, which I believe to be the case, that it is covered under warranty. I have removed the heater, packaged it, and shipped it back to them in Florida for inspection and repair.
Ground loop checks for SUS have been completed for the following HAM's:
HAM2, HAM3, HAM4, HAM5, and HAM6.
Multiple shorts to ground chamber were found and addressed. Many cables required the in-vacuum cables to be disconnected at the flange and re-seated. See alog 12528 for similar issues of four screws touching the feed-thru if not recessed completely.
HAM 3 gave us the most difficulties. In-chamber shorts were found at one of the table brackets. We also suspect air-side cables SUS-3 and SUS-26 to be faulty. To convince ourselves we had no grounding shorts in-chamber we disconnected the following air-side cables and tested directly at the air-side feed-thru: cables SUS-3, SUS-2, SUS-25, and SUS-26.
Same was seen on HAM5 for cable SUS-20.
Testing of OFI and SQZ ZM(tip-tilts) all passed.
TCS temperature sensor - Read about 110 ohms on pins 1/2 and 14/15 which does not agree to drawing. According to D1102257, two sets of RTD's should be seen on pins 2/3 and 14/15 and on pins 12/13 and 24/25.
Shorts were also found in the BSC chambers that still need to be looked at:
ITMX - SUS-42, SUS-57
ITMY - SUS-9, SUS-17
BS - SUS-81, SUS-82
Please note that moving cables in-chamber can produce shorts. Please use caution when doing final closeout activities.
Translating which BSC SUS cables correspond to which, from D1100022, ITMX - SUS-42 = M0 LF RT, R0 LF RT OSEMs' signal chain, from vacuum flange to field sat amp SUS-57 = L2/PUM UL LL UR LR OSEMs' signal chain, from vacuum flange to field sat amp ITMY - SUS-9 = Reaction Chain's (R0) F1 F2 F3 SD OSEMs' signal chain, from the vacuum flange to the field sat amp SUS-17 = L2/PUM UL LL UR LR OSEMs' signal chain, from vacuum flange to field sat amp BS - SUS-81 = M1 F1 F2 F3 LF OSEMs' signal chain, from vacuum flange to field sat amp SUS-82 = M1 RT SD OSEMs' signal chain, from vacuum flange to sat amp
Bubba, Mark Dodson, Tyler Guidry We installed both HAM 4 doors today and tightened door bolts. I informed Chandra and Kyle.
I checked the alignments of the IMs since I finished working yesterday, and found that IM1, IM2, and IM4 recoverd their alignments when restored this morning, but IM3 did not, it has a significant change in alignment in pitch and yaw.
IM3 change in pitch is ~-1000urad, and change in yaw is ~-1500urad, however the alignment sliders are at (0,0), and have been since yesterday, so there's no apparent reason for the change.
My investigation into IM3 found the source of the change in alignment. Set screws on the upper OSEMs and bolts on one blade assembly were not tightened to the same spec that I'm using during this vent (to correct the torque of all of the bolts in the IM towers).
These are easily identified as bolts that were loosened for the recent bias relief and wire shift on IM3, so mystery solved.
Before correcting the bolt torque, I tapped the IM3 tower and the IM3 OSEMs/blade spring shifted, changing the optic alignment.
Bolt/set screw torques were corrected, however the OSEMs still need to be recentered, which will happen tomorrow.
These shifts were actually due to the 4 bolts that hold the top plate of the IM cage to the rest of the IM cage, which are hidden under the blade spring EQ stop brackets, so have not yet been torqued to spec. While a few incidental set screws and bolts were not quite torqued to spec in other areas on the IM cage, as I noted in my comment, those were not actually the cause of the shifts. The root cause of the shifts are the 4 hidden loose bolts that are allowing the entire top plate of the IM cages to move, altering the IM alignment.
The optic that is installed in IM4 is SM2-01, and from the document T1200140-v1 I've identified it's transmission to be roughly 5900ppm, p-pol. For a 160uW incident beam, the transmission would be approx. 1uW. The transmitted beam is split evenly between IM4 Trans QPD and the ISS array, so at 160uW incident on IM4, each of the two transmitted beam paths has about 0.5uW of laser power.
Chandra requested that a witness plate be put in the output tube section under a port where a proposed new VE pump will go. This morning, while closing out HAM4, I went in and laid this plate (in a horizontal holder) in the specified location. Pictures below. While doing this, I also inspected the floor and found many large particulate pieces. I spent some time carefully wet wiping, and picking up (with tweezers) fuzzies, fibers, and other bits, which were along mostly the central part of the tube. All of this is has likely been tracked in from the trips down this tube for work. I am skeptical of the in-chamber shoes which are top of my list as being the probable fuzzy contributor.
Note, the last witness plate picture is just showing the particulate I removed from the tube and brought out to dump on a wafer for easy inspection. Looks to be fuzzies, glove bits, metal, body parts... usual stuff.
Just to inform here.
The mechanical design of the BSC HEPI hardware does not provide for locking the platform 'down.' It only holds the platform up and locks it horizontally. Additionally, many of the horizontal locks are very difficult to access; so, we tend to pinch tangentially but only push in radially on each corner for a platform lock down. As a result, when we unload a HEPI, such as when a Quad is removed for TM rework, the HEPI is at risk to lift while under-weighted.
The removal of the ITMX for optic replacement presented just such a situation to study. The attached 80 day trends of the ITMX cartesian IPS positions show what happened in this case. Alog entries sync clearly with shifts seen on the IPS and naturally with the largest seen on the Z dof. With only 25um of vertical shift seen on the IPS, it may be that there is actually no shift or slippage in the locks but only distortion in the system...Although I'm trying to visualize what is happening and... hmm, not sure I see it.
Regardless, slip or distortion, you can see the platform has basically returned right back to where we locked it once the ITMX was returned although it took weeks to do so maybe suggesting a slip stick process.
J. Oberling, B. Weaver
Yesterday I completed the install and alignment of the AWC mirrors and beam dump on HAM5. Betsy and I placed the mirrors on the table on 11/30/2017 and intially aligned them (as described below); I then installed and aligned the black glass beam dump yesterday. The install went smoothly, the only slight hitch being an interfering OFI dog clamp forcing me to slightly move the beam dump from the position called out in the H1 AWC drawing (D1700468); it is ~3/4" closer to the OFI than called out for in the drawing. The first picture shows the completed install, and the second shows a close up of the AWC beam dump with its slightly changed position.
The optics were aligned using the same laser setup used for the temporary oplev from the SRM swap from earlier in the vent (3rd picture), in which a spare optical lever laser was used in conjunction with a fiber collimator and one of the Brunson tripods from IAS; the viewport emulator (4th picture. Hi Betsy!) was attached to the HAM chamber to simulate the viewport locations. The alignment itself was very straigtforward and proceeded with the following steps:
After I installed the beam dump, I double checked the alignment and all was still good. This completes the HAM AWC in-vacuum installation.
We avoided installing the table baffles and the OFI/Septum baffle on HAM5 to keep them out of the way on ongoing work, but yesterday we were given the "all clear" and threw them in. Jim, Jason, and I quickly found all of our bagged hardware and had no issues putting it all on. The top septum baffle panel (D1700280-01) had more than the average number of scratches, noting it here with a few pictures for future info.
Sadly we forgot to get a final set of pictures since we were all fighting hunger. We can snap before the chamber is closed.
I ran long tfs on HAM3 overnight, given the state it's in (hepi locked, in air) tfs look good. Attached plots show cartesian tfs for GS13s and CPS. Main resonances look clear, all the high frequency (>10hz) crap is from HEPI being locked (I think, it looks worse on the CPS, which is what we've seen in the past). Cabling on the east side looked pretty messy, but doesn't seem to have been a problem.
Jeff Bartlett:
16:35 Added 200ml to Xtal chiller
TITLE: 12/07 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
Wind: 2mph Gusts, 1mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.29 μm/s
QUICK SUMMARY:
Slick conditions on site due to freezing fog. Otherwise, environmentally calm.
Woke up early this morning to RO alarms. Apoligizes to everyone else that got those alarms in the middle of the night. Onsite now dealing with the issues. Yesterday, the 480v water heater used to pre-heat the water before it enters the RO had a major leak. I disabled and by-passed the heater so we still have water, however, the RO has to work much harder to be any where near as efficient as it was before, which was getting questionable at best. It is OLD. I have a new RO that I will install as soon as I have all of the electrical. I am also following up with the water heater manufacture to remedy that issue.
J. Kissel, H. Radkins
Hugh and I hammered essentially everything big bolted to the HAM5 table this afternoon, including:
OFI Cage (with new baffling?)
OFI Side Baffle (drawing??)
SRM Cage (with new Venetian Baffles D1700257)
SRM Table Baffle (D1700270)
All 3 HAM ISI Front Guard "Beard Cover" Baffles (D1700265)
SR3 Table Baffle (D1700270)
SR3 Cage (with new Venetian Baffles D1700239)
SR3 TCS ROC Heater (D1500258)
ZM2 Cage + Spacer (D1600094)
ZM2 Septum Window REFL Dump + Spacer (Standard ISC V-Dump & Post + D1700041)
Attached are all the pictures.
Analysis will come, but my first impression from the raw data (without comparing to any previous data):
- The SR3 Cage has several High-Q features at ~300-400 Hz
- The ZM2 Cage and ZM2 REFL Dump structures have High-Q features at ~120 Hz.
- All other stuff is well-damped.
Notes:
- When hammering the OFI Side Baffle, we left the accelerometer in the same location as when hammering the cage itself.
- When hammering the SRM Table Baffles and the Plus X and Middle Beard Baffles, we left the accelerometer in the same location.
- When hammering the SR3 Table Baffles and the Minus X Beard Baffle, we left the accelerometer in the same location.
This afternoon Ken disconnected the wiring from GV4 motor and encoder which caused the valve to show a yellow state on MEDM. The electrical disconnect on side of valve was already turned OFF and locked - Ken verified no current and I officially LOTO. Mark and I pre-assembled shroud and hope to test fit tomorrow morning on GV4 before crane use at HAM 4. Ken took notes on wiring configuration and will need to come back to re-wire.
GV4 annulus pressure spiked during this activity, likely from being bumped. We are reminded to use extreme caution around this system.
Today I checked the status of the HAM2 baffles in order to get the table close to a final payload state in prep for the final ISI balance/TF check still due. I finished reattaching the PR3 baffle and it's SHCS caps, and the dogs of the SUS that were removed due to the targeting system. Cheryl still as some work in there, as well as Kissel's intended B&K hammering there tomorrow.
TBC...
5pm local: 1.0e-4 Torr
Dec. 8th: pressure 7.8e-6 Torr at noon
3:30pm local: 7.2e-6 Torr