Reports until 18:22, Wednesday 03 December 2025
H1 SQZ
anthony.sanchez@LIGO.ORG - posted 18:22, Wednesday 03 December 2025 (88347)
Touched SQZR Settings & Sliders

TITLE: 12/04 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering & LOCKED
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 6mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.28 μm/s 
QUICK SUMMARY:

SQZ_OPO_LR was giving us this error: 
"CLF frequency out of range, check CLF CMB".
I do not recall how this was resolved by Daniel while he was checking out the CMB. 

Once that was resolved we got the classic: "pump fiber rej power in ham7 high, nominal 35e-3, align fiber pol on sqzt0."  issue.
The Quarter & Half wave plates on SQZT0 were touched up to minimize H1:SQZ-SHG-FIBR_REJECTED_DC_POWER_MON. 
OPO was locked. Great!


Then the FC wasn't locking: 
So FC2 was moved from its nominal location. only after I accidentally moved ZM1 and reverted it.
Fumbled with the FC2 sliders for a while, then used the clear history button.
Fumbled around some more with the FC2 sliders. 
Locked the the FC with FC2 P @ 246.1 Y @ 51.1

And now the SQZ has been SQuoZe.

Forcast for tonight's wind looks good for a stable lock.