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Reports until 07:06, Sunday 02 February 2025
H1 OpsInfo (SQZ)
anthony.sanchez@LIGO.ORG - posted 07:06, Sunday 02 February 2025 - last comment - 07:33, Sunday 02 February 2025(82585)
Owl Operator assistance Required Sunday morning

TITLE: 02/02 Owl Shift: 0600-1530 UTC (2200-0730 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 3mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.37 μm/s
QUICK SUMMARY:
I got a call to help H1 get relocked. When I logged in to start helping we were in POWER_10W.
Once we reached NOMINAL_LOW_NOISE ... we lost lock before Observing can be reached.
Once H1 Got past DRMI_1F I tried to get some Z's.

Allowing the H1 some time to relock, once it got back to Nominal_low_noise again the SQZ manager was stuck on beam diverter step, and hence H1 Called me back.

After poking around and trying to recreate my steps last time this happened: alog 82192

I started reading the troubleshhoting guide for SQZ: https://cdswiki.ligo-wa.caltech.edu/wiki/Troubleshooting%20SQZ

I tried to request FDS_READY_IFO[50] and miss clicked  [52]  Which changed the alignment of the FC2 mirrors and ZM4. [Not any other ZM mirrors!] 

Since then: I was able to narrow down the problem to the SQZ_FC not locking anymore. Likely because the ZM3 mirrors have now been moved.
 

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Comments related to this report
anthony.sanchez@LIGO.ORG - 07:33, Sunday 02 February 2025 (82586)SQZ

OK, after returning FC2 and ZM4 back to their prior positions. I am now getting the Beam diverter error message again, which is where I started when the IFO called me the second time.

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