Reports until 08:15, Friday 02 June 2023
H1 General (PSL)
anthony.sanchez@LIGO.ORG - posted 08:15, Friday 02 June 2023 - last comment - 10:53, Friday 02 June 2023(70086)
Friday Owl End Shift

TITLE: 06/02 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Aligning
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

IFO STATUS : UNLOCKED  with potential PSL Issue.
PSL-ISS Defracted power is still too high.

The Light on the H1:PSL-ISS_PDA_CALI_DC_OUTPUT has gone from 9V to less than 1V.

There are a number of PSL channels that all have a change in their signals around the same time. Both in the ISS Second loop and first loop.
Tracing back the from the Second loop, through the first loop points to something potentially right after the PMC. Jason has been informed and is heading to site to go inside the PSL and troubleshoot.

 

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Comments related to this report
jeffrey.kissel@LIGO.ORG - 10:53, Friday 02 June 2023 (70092)CDS, FRS, PSL
Source of the issues was a failure of an anti-aliasing filter electronics for the PSL ISS. See FRS:28134 and LHO:70089.