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Reports until 09:50, Friday 22 September 2023
H1 SQZ
camilla.compton@LIGO.ORG - posted 09:50, Friday 22 September 2023 (73053)
SQZ OPO ISS Unlocked from too many locklosses while PSL down, reset lockloss counter.

After this morning's 73050 PSL recovery, the OPO ISS stayed unlocked after it's lockloss counter reached 12 with SQZ_OPO_LR message "disabled pump iss after 10 locklosses. Reset SQZ-OPO_ISS_LIMITCOUNT to clear message". The SHG power is high, see attached, so this wasn't our usual 70050 issue of the ISS not being able to lock from the power being too low, just that the counter was reached while the PSL was coming back online.

Requested SQZ_MANAGER to NO_SQUEEZING, reset H1:SQZ-OPO_ISS_LIMITCOUNT on the OPO ISS screen, took SQZ_OPO_LR to LOCKED_CLF_DUAL_NO_ISS then back to LOCKED_CLF_DUAL, touched the OPO temperature as described in 70050 and reinjected SQZ. Left opo_grTrans_setpoint_uW = 80.

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