corey.gray@LIGO.ORG - posted 01:17, Thursday 30 January 2020 - last comment - 10:13, Thursday 30 January 2020(54810)
Back To Observing
After the lockloss at ENGAGE SOFT LOOPS, I made sure to have ndscopes for ASC & ADS Lines up to watch for the next lock.
Sure enough, made it through with no issues at Soft Loops. Next scary spot lately has been LOWNOISE_ASC, but we made it through there with no issues.
Not sure what helped with getting to NLN, but will note the following:
- H1 seems to rarely make it up on 1st attempt (in the ~40mins it takes H1 to move through ISC_LOCK to NLN). Seems like H1 needs to have atleast 90+min to have a chance to get to NLN. Is there still a thermal issue at play here?
- Switched SEI_CONF back to WINDY for this lock.
P.S. Had teeny tiny 10^-17 SDF diffs for a couple of ALS channels, so I ACCEPTED (diffs are attached).
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I have modified the scripts that write these values to ensure that they get rounded also in the case of a ctrl-c exit, so hopefully we won't see these anymore. When I check the Xarm green initial alignment setpoints on Tuesday, I will test the new rounding.