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Reports until 16:54, Wednesday 13 December 2023
H1 ISC (OpsInfo)
ryan.short@LIGO.ORG - posted 16:54, Wednesday 13 December 2023 (74794)
Streamlined SRC Steps During Initial Alignment and Lowered SRX/Y Triggering Thresholds

I've made an update to the INIT_ALIGN Guardian node so that SR2 alignment will now always run before SRC alignment while doing an automated initial alignment (reminder that SR2 alignment does not automatically run when manually going through the initial alignment steps). This allows for the other SRC alignment steps to go uninterrupted; previously when waiting for SRY to catch, INIT_ALIGN would start an SR2 alignment just because a timer expired, which should overall simplify the SRC alignment process and save some time.

We have also been having issues today during the SRY alignment steps where even after lowering the LSC SRCL triggering thresholds (see alog71573 and item 3 of alog71656), SRY will not catch. Since this appears to be a recurring issue, I've lowered the starting upper and lower SRX/Y triggering thresholds in lscparams.py from 0.35 and 0.25 to 0.315 and 0.23, respectively.

All changes are loaded in their appropriate Guardians and updated in svn.

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