TITLE: 06/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 13mph Gusts, 7mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.12 μm/s 
QUICK SUMMARY:

Ops workstation (cdsws29) was stuck recovering from morning reboot (hit the on/off button to restore).  nuc23 & nuc22 look like they partially came back (will need to log back into them to sort their app windows.

BSC2 SEI work continues (w/ L4C swap & other final checks), FARO measurements may be complete (but FARO remains set-up outside HAM3 just in case).  SQZ work continues as well as HAM3 activities and also transfer functions for ITMy.

Workstations were updated and rebooted.  This was an OS packages updated. Conda packages were not updated.

This afternoon, after IAS verified the BBSS had not moved much, Mitch and I went up above and started unlocking the ISI to rebalance. This actually went pretty smoothly. Unlocked st2 after getting a locked reference position for the CPS and loosening the balance mass lock nuts, balanced the ISI, initially using just the raw vertical cps local readout in counts, then looking at the cartesian cps in Z,Rx&RY when the balance was close. When that was done, we pulled the screws holding the st1 balance masses and unlocked st1. Small adjustment on st1, relocked both stages, locked down balance masses again and unlocked one final time to check both stages were still good. Z I left a little high to account for buoyancy, RX and RY residuals were all under 10urad. RZ residuals were higher, I think we swung about 20 urad between locked and unlocked, but I think that measurement is less repeatable between lock and unlock. We re-locked the ISI and have some clean up tomorrrow, we put our removed balance masses on top of st2 under the cover, because we didn't have bags or labels.

Tomorrow we will replace the bad L4C on st1, unlock and do final checks. HEPI seemed to ring up when I tried turning on the loops this morning, I'm hoping that is because the ISI was locked and that was changing the HEPI plant or because of work in chamber, so that needs to verfied in addition to ISI close out tfs.

TITLE: 06/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

BBSS closeout tasks in-chamber, lvea furniture-moving, SQZ work today.  ITMy exhibited rung up motion in the afternoon--people in the next chamber over could see ITMy swinging!  
LOG:

• 1415-1638 Technical cleaning 
  • 1440 brought out trash & then off to check LSB; will head back into lvea for another round ( [kim]
  • 1510-1638 back to lvea
• 1507-1529 Ameristat search (betsy)
• 1518-1529 Chat with Betsy (randy)
• 1532-1538 isolating aux cart for ham1&2 annulus (jordan)
• 1533-1613 redress SPI cables at HAM3 on +Y(jeff)
  • 1623-1633 fixing a squished cable (jeff)
• 1545-1707 craning @West Bay (randy)
• 1610-1854 FARO for BBSS (ryanC.jason)
• 1648-1756 BSC2 unlock hepi to see if everything looks good between locked/unlocked (jim.mitch)
  • 1746 mitch out
• 1651-1808 BBSS in-chamber checklist items (ibrahim.betsy)
• 1741-1935 HAM7 table work (camilla)
• 1802-1935 SQZT7 table work (ryanS)
• 1812 certication paperwork check at FCES (bubba)
• 1911-1919 running laptop to SQZ crew (sheila)
• 1932 Received monthly automated alert test for sirens (phone call)
• 1947 craning Aluma-lift over x-arm (randy)
• 2002-2251 In-chamber BBSS closeout---baffle install, removed items under the floor panels, and assisted with installing ISI lockers (betsy.ibrahim.elena)
  • elena & betsy came out earlier.
• 2014 ITMy transfer functions (rahul)
• 20:26 Betsy phoned about big motions on ITMy visible by eye from another chamber!
  • 2121 SD OSEM took the big step down to -400 (from -90)
  • Dave noticed noise at 2117
  • Oli & Elenna have been investigating
• 2038-2138 viewport removal for a blank at HAM5 (travis)
• 2100 seismometer testing on x-arm (shrey.carlos)
• 2103-2155 PEM ADC(dave)
• 2100-2321 Ey trip for Beckhoff hepi upgrade; ISI taken to Damped_HEPI_OFFLINE +  (patrick)
• 2104-2340 cp1 ion pump install (jordan,jacob,owen)
• 2106 BSC2 isi floating, locker install,  & then ISI balance (jim.mitch)
  • mitch left earlier
• 2112-2324 SQZT7 table work (ryanS.camilla.sheila)
  • sheila joined them for a bit.
• 2133 HAM5 ISI WD tripped(restored to isolated at end of shift)
• 2234 HAM4 ISI WD tripped (restored to isolated at end of shift)
• 2236-2337 HAM3 viewport adapter install (travis.shoshonna)
• 2236-2251 HAM2 dustmonitor cleaup (ryanC)
• 2332-2342 Setting up FARO for tomorrow (jason)

As wer WP 13361 the awiki OS was upgraded.  It is running again.

R. Crouch, J. Oberling

This morning we measured the position of the BBSS after the HEPI actuators were installed to see if/how things moved during actuator installation.  Short version: Not much movement overall, but there are a couple spots that moved more than expected; there was a slight CW rotation of the BBSS of at most ~170 µrad.

The attached picture shows the position of our measurement points on the BBSS both before and after HEPI actuator installation; Round 5 is from last Wednesday, before the actuators were installed, and Round 6 is this morning.  As the deviations in the picture are all related to the CAD nominal, the table below shows the measured positions from Round 5 and Round 6 and the deviation between these 2 measurements, to give an idea of the amount of movement from actuator install (all units are in mm).

So all in all, not much motion, as we anticipate.  However, there are a couple points that did move: The +X/+Y point moved +X by 0.105 mm, and the -X/-Y point moved +X by 0.09 mm and +Y by 0.185 mm.  Overall this appears to indicate a +X shift and a CW rotation, but I can't really square that large +Y move in the -X/-Y point with anything else, it really stands out and doesn't make much sense to me.  I'll think on this some more and post any revelations as a comment, but for now everything is still within our position spec and we rotated a little more in the CW direction (which based on Keita's last alog should help the overall IFO alignment), so onward towards chamber closeout we go.

We suspect this is the final FARO measurement of the BBSS that we'll take, but to be on the safe side we have left the FARO set up outside of WHAM3 for now.

While Betsy, Ibrahim and I were in BSC2 to work on the BBSS, we noticed that ITMY started shaking significantly. To give you a sense of the motion, we could see the UIM moving while sitting on the floor next to the BBSS. Betsy called the control room, and no measurements were happening. This happened a few times until Corey put ITMY in SAFE.

I came out and began to investigate the issue with Oli. I tried putting ITMY back in ALIGNED, which turns on top mass damping and alignment offsets for the main and reaction chain as well as the L2 to R0 wit damping. After a few minutes, we start seeing saturations and large motion. At first I was suspicious of the L2 to R0 damping, so I turned it off, but the problem persisted. I then turned off all R0 damping, still the same problem. We put ITMY back in SAFE and the oseminfs of the main and reaction chain still show oscillation, but it seems to be stable or slowly damping down. There are also small kicks that the osems see. We're wondering if the in-chamber work is causing ITMY to move excessively.

We put ITMY back in aligned again and the excess motion damped down, as expected. However, we're still seeing some random saturation on R0 F3, and we're not sure why. The alignment offsets are the same that they've always been. Trending back to the start of the vent, it looks like ITMY R0 F3 may have always been occasionally saturating.

Whatever the problem was, it has stopped for now. Oli is looking into why the watchdogs didn't trip.

Per FRS 38164, the viewport that was on the A1F2 port (South door) of HAM5 was removed and replaced with a blank.  The CF knife edges on both the door flange and the viewport looked good.  

There was no sticker on the viewport, but the scribe on the edge of the flange indicate that it is a ZV-800, serial number R140.

Another port to add to the pumpdown leak check list.

Today Ibrahim and I tried water to remove the sleek/spots/scratches on the BBSS AR detailed in alog 90600.  I tried to rub a water soaked q-tip on a small ~5mm x 2mm section of one fo the lower areas previously worked on.  Once scrubbed I chase wiped it with a methanol alpha swab.  I repeated this a few times.  No change.  We then tried to see if we could see these features from looking at the inside of the AR surface through the barrel which sometimes gives hints at if things are in the optic (often visible to the viewing angle) or on-top of the optic (often invisible to this viewing angle).  Unfortunately, we in-fact could see them this way.  So, they may be scratches.

J. Kissel

This morning, I re-installed the H1SPIH23 pathfinder's photodiode and picomotor cable-table-brackets (CTBs) that had been temporarily moved to upgrade the Corner 1 H1 capacitive position sensor (see LHO:90791), and re-dressed the cabling cable clamps.

As mentioned in passing in LHO:90750 the CRS team will now consume the "spare" SPI_HAM3_004 quadrupus leg, that's J2 of the S2500513 instantiation of D2400342, which manifests as CH8 on the TCSY_C02, Controller 10, PICO G picomotor controller driven by the Corner 2 ECAT chassis -- which shows up on the H1SYSCSAUX computer's SDF system. So this has been routed in the +X direction and up in +Z to the table top on the +Y corner.

I'll post pictures of all the re-dressing in the comments so I can better caption them.

Mitchell, Disha, Robert

On Friday we finished alignment of the baffles on the +X side of HAM3. This took extra time because we didn’t expect 12 point flange bolts on the PR2 dog clamps that we were moving. Beam spot photos from the BBS showed that we had mitigated retroreflections from the dog clamps and other retro-reflectors that we were worried about, but the brackets for two of the SPI baffles formed strong 2-D corner reflectors with the table top (see figure). We need to hide them with something that is the same height but not normal to the BBS-PR3 beam, and we need to finish aligning the baffles on the –X side.  We may also need to treat two of the table baffle brackets on the +X side of HAM3 if they produce retroreflections in PR3 beam spot photos.

Eric, Ryan S, Camilla, Sheila

All week we have been working on getting a set of OMC scans and beam profile measurements for different psams.  We have both sets of data now, with plots and scripts coming soon next week.  

OMC scans

We started with a script that Begum gave us from HAM6 work at LLO.  We set up ASC loops to go from ASA and AS B DC signals to ZM4 and ZM5 (as described in 90742).  We struggled a while to lock the OMC on the seed beam in air, hampered by 90754.  With that noisy OMC lock, yesterday Camilla manually aligned OM3 and the OMC suspension carefully to maximize the 00 transmission.  We then added offsets to H1:OMC-ASC_QPD_{A,B}_{PIT,YAW}_OFFSET, which is not the usual location for OMC QPD offsets.  We will need to get rid of these offsets before we go back to locking. 

OMC A offset: PIT 0.088 YAW: 0.133  OMCB offset: PIT 0.27 YAW: -0.22

We found that we were able to move the psams, whih misaligns the OMC terribly, run the centering loops to the ZMs, then run the OMC QPD loops to bring the 1st order peaks back down to a couple % of the 00 peak repeatedly.  We spent some time modifying and then debugging the script that Begum shared with us.  

It takes in a list of ZM4 and ZM5 strain gauge values, moves the psams servos target to that point and waits 30 seconds with the ZM centering loops on (it doesn't check the acutal value of the strain gauge, perhaps this would be a good thing to add next time).  It then turns on the OMC QPD loops for 20 seconds.  It then takes a 100 second ramp of the OMC PZT, and saves the times and ZM strain gauge targets into a yaml file.  

There is a template you can use to watch all this at userapps/sqz/h1/Templates/ndscope/OMC_psams_scans_monitor.yml  The script that runs these sweeps is at sqzutils, or /ligo/gitcommon/squeezing/sqzutils/omc_scans_sweep_psams.py  There is also a script there that loads the data, identifies the peaks and estimates mode mismatch and misalignment there, analyze_psam_omc_sweeps.py.  A preliminary plot is attached (apologies for the color choices and linear y scale here).  

M2 profile measurements

Eric and Ryan S took a series of M2 profiler measurements of the beam on SQZT 7 today, doing the alignment procedure at each strain gauage setting (they didn't adjust ZM alignments).  Their data is in here, we will post some plots of this next week.

Note about ZM5 strain guage

While Eric and Ryan were making beam profile measurements, they ran into a situation where ZM5 would not go the strain guage setting of 2.  I was able to get it to go to 2 manually, but noticed that there were times when the strain gauge voltage dropped to zero, similar to a problem seen at LLO HAM6 recently.  We should follow up on this next week.

I updated the some of the medms for the blends for HAM2&HAM3 to include the SPI and CRS, added INERT_MID

Blend of four sensors: /opt/rtcds/userapps/release/isi/common/medm/hamisi/ISI_CUST_BLEND_SUPSENS_FOUR.adl

Made new block for a blend with four sensors: opt/rtcds/userapps/release/isi/common/medm/hamisi/new_FADER_4PART.adl

The blocks for 2 sensors and 3 sensors (new_FADER_PART.adl, new_FADER_3PART.adl) currently have T240 labeled instead of SPI, I didn't want to mess with those blocks, as they are used for other chambers and it's still labeled T240 in the model, but for the 4PART I did switch T240 to SPI

Made new blend fade medm screen for HAM2 & HAM3: opt/rtcds/userapps/release/isi/common/medm/hamisi/ISI_CUST_H23_BLEND.adl

Made overview screen for HAM2&HAM3:opt/rtcds/userapps/release/isi/common/medm/hamisi/ISI_CUST_H23_FADE_OVERVIEW.adl

The only thing changed was to switch which screen the ST1 BLEND FADE button takes you to the new medm.

I added and commited all these to the SVN and updated the sitemap to link the them for HAM2 and HAM3

(Jordan, Owen, Jake, Gerardo)

The cryotrap cooldown continues, we continue to pump on the cryotrap volume with a turbo pump, the turbo is backed with a SS500 aux cart.

Small changes were the removal of the calibrated leak from the RGA tree, along with the removal of other components in preparation to install an incoming small ion pump next week.

Current pressure in the cryotrap volume is 7.38X10^-10 Torr.

Jeff, Betsy, Arnaud, Oli

Yesterday afternoon we went to the BBSS QOSEM satamp and checked the coil resistance. We did this by putting the BBSS in SAFE and then unplugging the Satamp to Duopus cables one by one. Each of these three cables have the pins for two QOSEMs, split as CH1 + CH2, CH3 + CH4, and CH5 + CH6. Each cable was unplugged and then the pins for each coil probed. Below are the results. These values are all pretty similar.

Pictures of as-built balance mass of ITMs taken today to compare with drawings in anticipation of rebalancing both ITMs with the added baffle weight

ITMY:

table: pic1, pic2, pic3
corner 1 side wall: pic4
corner 2 side wall:  pic5
corner 3 side wall: pic6 and pic7

ITMX: 

table: pic8, pic9, pic10
corner 1 side wall: pic11
corner 2 side wall: pic12, pic13
corner 3 side wall: pic14, pic15