Reports until 02:02, Saturday 06 July 2024
H1 General
anthony.sanchez@LIGO.ORG - posted 02:02, Saturday 06 July 2024 - last comment - 02:03, Saturday 06 July 2024(78893)
Friday Eve shift

TITLE: 07/06 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

Lockloss 1:06 UTC
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1404263217
Lockloss Screenshots attached

Relocking:
After the Lockloss I had pretty small flashes on X arm.
I allowed Increase flashes to run and it didn't get me better than 0.3.
I then touched it up by hand and could not get it better than 3.1, Trending back I think the goal is above 1.
I then tried to get better alignment by rolling back to an alignment from the beggining of the last lock.

I tried the Alignment after the Last initial alignment.

Im going to try to move just PR2 now.
Revert all movements back to right after we lost lock.

Sheila did a small Pico motor move in HAM3.
Pico Motor ALS/Pop steering HAM1 ( Actually in HAM3).
H1:ALS-C_TRX_A_LF_GAIN was increased temporarily to make the X arm WFS run.

And Sheila did another move of ALS/Pop steering once the WFS were running.

Note the H1:ALS-X_FIBR_A_DEMOD_RFMON beat note dropped down to -38 and the threshold was lowered to -43.

Once this was done we could do an Initial Alignment, BUT we did not have anything on AS Air
Moved IM4 & PRM to get light on AS Air and Refl PRM cam.
Sheila used IM4 PRM & PR2 Osems to match prior OSEM values to do a "manual WFS releave past" to Move PR2 which gave us increased IR flashes.

Touched up PRM in Yaw to lock PRX

Finished Initial Alignment at 5:19 UTC

Locking was being difficult and would lockloss at FIND IR and Locking ALS.
I tried giving another Initial Alignment after it failed a number of time because we did touch it up from hand.
Even after that IA  it was still locklossing at Find IR and Lockling ALS. Paused in Locking ALS to allow the WFS to calm down.
Yeah ALS WFS DOF 2 is pulling it away for some reason. But even trying to allow the WFS to melow out, it still catches a Lockloss.
Finally got past DRMI !!! YAY!!!

LOCKLOSS!? From MAX POWER!?
7:30 UTC Random HEPI HAM1 Watchdog trip.
IOP SUS56, 34, & 23 all had a IOP DACkill trip at the same time.
Seems like sush2a Had DAC error calling in CDS team.

CDS team is resetting all the SUS front end models because everything from HAM1 to HAM6 tripped in this timing glitch. ****

LOG:
Sheila remotely Helped get me a good Alignment and got me through a rouch IA
Dave B & Erik helped restart all the Front Ends.
Jim was also called due to a HEPI trip and he was next on the call list.

Every one has been cycled to the bottom of the list.

 

Images attached to this report
Comments related to this report
anthony.sanchez@LIGO.ORG - 02:03, Saturday 06 July 2024 (78895)

See Daves alog about the CDS Timing error https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=78892