(Kyle R, Gerardo M)

Removed and replaced the annulus ion pump for GV20 at X-End.

We used the crane to suspend the annulus piping while the system was decoupled from the ion pump flange.  The instrument air compressor was turned on to feed the aux cart safety valve.

No issues to report during the swap.  After the swap the new flange was leak tested using helium, we sprayed very aggressively and no leak was detected, leak test was performed with a background of 8.0 x 10^-10 torr *L/sec at the leak detector.  After the system passed the leak check, the annulus ion pump system was pumped for 3 hours with an aux cart, on that time frame the pressure dropped enough for the ion pump to be able to sustain it, after the 3 hours the hanged turbo and aux cart were decoupled, system is back to nominal.

The instrument air compressor is off.

Note for vacuum team, on the ion pump magnet frame 1 of the 4 bolts is broken, an attempt to remove it with some needle nose pliers was unsuccessful.

Done under WP#8515.

WP 8384 ScottL, ChrisS & HughR

With the HAM7 south Crossbeam out, 54633, we turned around, in a very small space, and extracted the HAM8 north Crossbeam today.  Maybe a little easier than the H7S xbeam but still a delicate threading between the Support tube ends, chamber bellows, SEI Expansion Bellows all while trying not to move the Support Tubes.  In the end it all worked and we managed to clean the space up even a bit.  Now ready for the Radius plates on HAM8 and the U-Channel and Radius Plates on HAM7.  Might manageall that next Tuesday but we need machine shop Tyler.  As a forecast though, HAM7 & 8 will be ready for Transport in three more Tuesdays.  Attached is the current state beteween HAMs 7 & 8.

TITLE: 01/29 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 9mph Gusts, 7mph 5min avg
    Primary useism: 0.07 μm/s
    Secondary useism: 0.39 μm/s
QUICK SUMMARY: Ground has now calmed down and we are still reacquiring lock after the earthquake.

TITLE: 01/29 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Camilla
SHIFT SUMMARY:
LOG:
16:00 Karen to EY, Vanessa to EX
16:15 Hugh, Scott to LVEA HAM7
16:30 Rick, Jason to PSL for FSS work
16:45 Richar, Fil to EY
17:00 Sheila to HAM6
17:00 Bubba to LVEA
17:15 Bartlett to LVEA

After EQ calmed down, I did an initial alignment, because the ground was high, we forced the ALS guardians to offload green wfs, which required manually moving ALS guardians and finally the INIT_ALIGN guardian to move on. Jenne also tweaked SRCL triggering some.

WP 8511

The ETM PUM noise monitor boards were replaced with D1900052 per ECR E1900049.

EX
Chassis Serial Number S1000343
Serial number of new monitor board board is S1900296

EY
Chassis Serial Number S1102652
Serial number of new monitor board board is S1900293

ITMY and ITMX units were modified on 1-14-2020, alog 54505.

F. Clara, R. McCarthy

WP8520 Adding two fast channels to LSC model

Sheila, Dave:

Sheila made a new h1lsc model which adds two new 16kHz channels to the DAQ:

• H1:LSC-POPAIR_B_RF18_I_ERR_16k_DQ
• H1:LSC-POPAIR_B_RF90_I_ERR_16k_DQ

h1lsc was restarted followed by a DAQ restart

WP8521 Add SUS SW2R channels to DAQ for ramping trends

Dave:

I created a new H1EPICS_SUSSW2R.ini file and added it to the DAQ.

DAQ Restart, Green up EDC

Dave:

DAQ was restarted for three changes:

1. h1lsc fast channels added
2. H1EPICS_SUSWS2R slow channels added
3. H1EPICS_PSLOPC0 slow channels removed while h1pslctrl0 IOC is non-operational

Control Room FOMs

Dave:

I patched the OS on all the control room FoM machines and rebooted them.

Enabled tagging on EX SEI and SUSAUX network ports

Dave:

I enabled ADMINLAN tagging to the H1FELAN ports of h1seiex and h1susauxex to try to get remote IPMI working again for these machines. This was a partial success, I can now ping the IPMI addresses for these machines but ipmi-tool does not connect to them. We may need to power cycle the computers or cold-cycle the IPMI cards to complete this.

Seismon gave us about 20 minutes warning for a 7.7 eq in the Cayman Islands, so I had time to ponder what to do. Watching peakmon, when I saw the first jump of about 2000 nm/s I pushed the big red button, and that gave sufficient time for the the chamber guardians to take all of the ISIs down to damped and nothing tripped. HAM1 HEPI did for some reason several minutes later, maybe the higher gain loops with IPS/L4C blends makes that chamber more vulnerable? Worth looking at.

Waiting for Peakmon to stay below 1e4 nm/s  to start recovery now. Screwed up earlier and missed a zero on my trace (peakmon was staying below 1e5, too high), so HAM2, HAM5, ETMX and ITMY all tripped.

The nitrogen piping supplying purge to the 3 IFO storage containers has been relocated from above HAM 7, 8, & 9 to below the HAM chambers to allow for removal of the chambers when it becomes necessary. The purge was turned off for approximately 3 hours during this relocate and is now restored to the containers. The piping along the H2 output arm is also located below the chambers in order to facilitate removal of HAM 10 when necessary.

Some cable tray was also removed from the top of HAMs 7 & 8 for the purpose of removing HAMs.  

I've been trying to find out if DARM is adversely affected by the CPS differential controls. I can't find anything obviously bad so far. Attached image shows, top to bottom, ASDs of LSC-DARM OUT, the EY ground super-sensor (gnd STS - BRS) and BRSY. "Full" is with the FULL_DIFF_CPS, "Corner" is with the CORNER_DIFF_CPS, "Full before R0" is the FULL_DIFF_CPS before the R0 tracking and Sept 2019 is from before the October vent work, before we added the cps differential controls.

Maybe hard to see, but red and blue (full cps diff vs corner only) don't show any real differences, even though the ground inputs were roughly the same. The gold and dashed lines had more wind (especially gold, the BRS shows elevated motion up to 1 hz) and the microseisms at these times were a bit different. The gold trace also shows darm is worse ~.1-.5hz =, which could be due to an earlier CPS diff filter or an older configuration for CPS diff in the corner (the ITMs used to follow the BS, now that's been reversed), not sure when I changed that filter for the BSCs.

I think the take-away is: because the R0 tracking has improved the scattering, we can run FULL_CPS_DIFF all the time, DARM doesn't seem to be negatively impacted. We don't see improvement either, but I think my post from Jan 6  shows we are more robust with it running. Again, I'd like some high microseism to compare, but it's hard to schedule.

LSC: no diffs that are monitored.  Also checking not monitored channels since we're restarting the model today, and I agree that all of them will be set by guardian before we need them, so no changes there need attention.

SUSPROC: 3 diffs for ETMY mode 7.  Accepting, since these are the same as Cheryl recently put in a few days ago (alog 54667) to have monitor filters.

ALSEY: Accepting lower thresholds for autocentering (last changed ~2 weeks ago). 

Only other SDF diffs are the usual ISI BS with 23 differences.

TITLE: 01/28 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 117Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY:

Mostly uneventful night except for a random lockloss, which took the usual 1.5hrs to recover from.

Time to get our Maintenance Day on!
LOG:

• 12:47 Sudden lockloss in very quiet environmental conditions.
  • Lockloss Tool Notes:
    • ETMx L1 glitches 0.1sec before lockloss
    • Several ASC Control Signals (Arm) HARD/SOFT signals glitch about 0.1sec before lockloss
  • 1-5th locklosses were all over the place!  (beginning to think H1 really just needs the time to humor us and cool down before it's ready to lock again)
  • 13:43-14:18 (6th attempt) Back to NLN & seconds later OBSERVING.
• 13:30 - 14:12 Noticed some small EQ activity, but nothing on SEISMON or USGS.
• 14:40-15:15 Electronics work (for roughing pump) in Mechanical Room (Ken)
• 15:24 Checking tumbleweed situation on X-arm (Chris, Scott)
• 15:46- 15:57 PEM Injection successfully run.
• 15:57 OBSERVATORY MODE:  PREVENTATIVE MAINTENANCE

Nice observing with H1 locked 7.25+hrs & quiet environmental conditions.

Attached are trends for oplevs.

NOTE:

• ITMx PIt continues its trend below -10urad  (approaching -20 urad) and needs to be centered.
• ETMx Pit is at -10urad.
• ITMx Yaw is close to -10urad, but decreasing.
• ITMy Yaw is close to +10urad, but decreasing.

TITLE: 01/28 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 116Mpc
OUTGOING OPERATOR: Camilla
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 5mph Gusts, 3mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.39 μm/s

No major EQs in last 24hrs, decent microseism, low winds!  (And rainy outside.)
QUICK SUMMARY:

H1's been locked 3.25+hrs just a hair under 120Mpc. 

• 00:32 SEI_DIFF to FULL_DIFF_CPS, should remain in this state, see Jim's alog 54761
• 03:10 Lockloss (alog 54763)
  • Reloaded ISC_DRMI and ALIGN_FO as requested by Jenne and TJ.
  • After 4 minutes, the FSS hadn't locked so I toggled the auto-locker.
• 03:34 Stuck at FIND_IR and Jenne realized that I should have gone back through DOWN after reloading ISC_DRMI.
• 03:53 Noticed GraceDB error and asked Livingston to tell us of any events.
• 03:59 Jenne noticed MC Refl camera was frozen, it wouldn't restart after I pressed "Restart service" on CDS>Digital Vidoeo Cams>!Process Ctrl
• 04:07 Called Dave Barker about GraceDB error, he fixed GraceDB and the frozen MC Refl camera
• 04:42 NLN and Observing  (known SDF diffs on alog 54763)

Sudden lockloss, no obvious reason in the control room. Looking at the attached plots of the FSS, it seems this started oscillating/became unlocked at the same time as the lockloss. I observed the same thing in a few locklosses this month, see alog 54711.

Not sure why this change occurred during the re-locking process. Accepting sdf diffs to go into Observe.