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Reports until 12:14, Friday 29 March 2024
H1 General
anthony.sanchez@LIGO.ORG - posted 12:14, Friday 29 March 2024 (76793)
Friday Mid Ops Day Shift Report.

TITLE: 03/29 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Aligning
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 1mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.30 μm/s
QUICK SUMMARY:

Relocking attempts:
Camillia Tried to manual Initial_Alignment IMC kept unlocking.
We moved IM1 and IM3 Both in Yaw. This did not help us.

We then tried reverting all (Except SQZ to GPS time: 1395555623 )

This helped our Diff beat note.but we could no longer get through ALIGN_IFO 's ACQUIRE_XARM_IR.

We got stuck waiting on H1:LSC-XARM_TRIG_INMON to go to 1. And it's flashes were just above 0.2.

After touching up IM4 and PR2 to try to get H1:LSC-XARM_TRIG_INMON to go above 0.2 ( the trigger threshhold : H1:LSC-XARM_TRIG_THRESH_ON)
Camilla and I thought at first, that touching these sliders could possibly help us increase those flashed to 0.2 , but after a while we felt that we were just fooling our selves and all the flashes were random. Some of those flashes were above 0.2, and ALIGN_IFO still did not move forward.

Jenne Driggers and I then restarted Manual_ Initial_Alignment to see if it was a green arms issue.
X-Arm has been much more difficult to lock since tise.

XArm ITM camera Error signal may not be benificial: We did alignment without the servo just using the TMS WFS instead.
We tried to go to ACQUIRE_XARM_IR and got stuck again then dropped back to Green arms to find our green arms had been reduced back down to 0.4 again the second time. That error signal was ignored for this attempt at Alignment.

we have gone back to ALIGN_IFO's ACQUIRE_XARM_IR and tried to lock XARM IR
Touching IM4 and PR2 again.
Increased gain H1:LSC-XARM_GAIN, -> This did not work.

Jenne D. is Watching H1:LSC-XARM_TRIG_INMON to try and increase flashes manually by touching up IM4 and PR2 again. Once again this is not helpful.

Align_IFO set to SET_SUS_FOR_ALS_FPMI
Restored ALL Sliders (EXCEPT SQZ) to GPSTIME: 1395555752 (A little after ALIGN_IFO had gone to SET_SUS_FOR_ALS_FPMI [5] just after initial alignment completed.)

Touched up Both arms. X arm ALS CAM Error signal looks much better this time.
Took ALS_XARM and ALS_YARM to Initial alignment then Initial alignment offloaded.

Took ALIGN_IFO to ACQUIRE_XARM_IR with out an increase in gain.

We are currently in PRC_ALIGN trying to manually align.

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