H1 Manager called on me to help with a bunch of SDF diffs.

- Some ASC POP A offsets, which were accepted in safe earlier today (85490), so I went ahead and accepted them for Observe as well

- IMC PZT offset changes, which were made earlier when working on realigning the IMC (85476)

- ALSX camera offsets, which were changed earlier (85472)

- the SR3 and SRM dackill bypass times were lengthened temporarily for part of the work today, which I realize now should have been reverted oops need to fix when we're out of Observing tomorrow

- SQZ OPO servo's common board excitation had been left switched on (switch on the right from EXC A), so I just opened the switch

TITLE: 07/01 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Oli
SHIFT SUMMARY:
SQZr trouble at the start of the lock but recovered and got to Observing at 00:07 UTC.

H1 was locked fine for 4 hours and 35 Minutes.
Then all the sudden Unknown Lockloss at 2025-07-01 03:56:04 UTC.

I tried to allow H1 to relock itself but it wanted me to find ASL-Y arm by hand and then seemed to get trapped in a PRMI loop. So after about 30 Minutes I did an Initial Alignment.
This did allow for a quick lock of DRMI_1F. 
H1 is currently at ENGAGE_SOFT_LOOPS and locking Quickly.  


LOG:

Unknown lockloss @ 3:56:07 UTC
No noticeable Seismic activity.
No PI ring Ups.
No saturations aside from HAM6 from the Fast Shutter.

On Friday Jun 27th Francisco and I went to the the PCAL lab and did a PCAL TX module maintenance according to T1600436.
AOM alignment was touched up

Results:

TITLE: 06/30 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 4mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

H1 Is Currently Locked at NLN {600} But not Observing due to a SQZ_SHG issue:
Error SQZ_SHG [LOCKED.run] USERMSG 0: PZT voltage limits exceeded.
Sheila is currently working on the issue.
 

TITLE: 06/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY: We've had to relock twice, the second time we struggled a bit with DRMI. We're currently locked at NLN but trying to fix a SQZ SHG PZT issue.
LOG:                                                                                                                                 

• 15:00 UTC dropped Observing to start commissioning
• 15:40 UTC lockloss
  • 16:50 NLN
• 18:23 UTC lockloss
  • 19:26 UTC NLN
  • UTC Observing after some SQZ work
  • 19:55 UTC Hanford monthly safety notification test
  • 20:45 UTC we dropped Observing to fix the SQZ ANG servo
• 20:46 UTC lock loss
  • I was prompted to find YARM by hand
  • 21:28 UTC I did an alignment after 2x of DRMI being able to lock but too misaligned for ASC
  • We still couldn't get DRMI, on the 2nd round of PRMI I tried to manually help PRMI after it locked
    • DRMI still took another 12 minutes after this, with some more small adjustments by me (~45 minutes in total)
  • 23:21 UTC NLN but the SHG can't lock due to a PZT voltage issue (too low)

20:46 UTC lockloss

18:23 UTC lockloss alog85433

M. Todd, R. Crouch, E. Capote, S. Dwyer

After 5 minutes or so from stepping the CO2 lasers from 1.7W to 0.9W, we began to see the 13Hz ring-up again before losing lock.

We believe this to be PRCL losing gain because of the change in the CO2s. I'm also wondering if the CO2s may be miscentered and causing some roll modes via differential heating of the fibers -- the frequenices do not exactly match up I think but need to check on this.

15:40 UTC lockloss while we were running the CO2 stepper. alog85429

TITLE: 06/30 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 4mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.07 μm/s
QUICK SUMMARY:

• We've been locked for just udner 19 hours
  • SQZing doesn't look the best, particularly at high frequency
• Low wind, secondary microseism is starting to creep up a little
• PI24 rang up 6 times overnight, but was damped
• Commissioning is planned from 15:00 - 19:00 UTC today

TITLE: 06/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: One lockloss, I had to run 2 alignments to get DRMI to lock.
LOG: No log.

• 16:25 UTC PI24 rang up but was successfully damped back down.
• 16:38 UTC lockloss
  • 17:16 UTC I ran an alignment after not being able to get PRMI
  • Still couldn't lock DRMI or PRMI despite having good flashes around 100
  • 18:32 UTC trying another alignment
  • DRMI locked quickly now, I also adjusted the OPO temp while relocking
  • 19:42 UTC Observing

16:38 UTC lockloss

TITLE: 06/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 2mph Gusts, 0mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

• We've been locked for just under 14hours!
  • 2 superevents overnight
• Low wind, low microseism
• The range has dipped a little bit over the past ~3 hours, seems SQZ related

TITLE: 06/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: Two locklosses, mostly automated relock on the first one. We are relocking at DRMI currently.
LOG: No log.

• 13:25 UTC lockloss
  • 15:53 UTC Observing
  • 18:23 UTC Superevent S250628am
  • 19:00 - 19:31 UTC dropped observing to run a calibration measurement
• 20:43 UTC lockloss
  • 22:05 UTC observing
• 23:18 UTC lockloss