ryan.short@LIGO.ORG - posted 16:01, Wednesday 12 June 2024 - last comment - 16:28, Wednesday 12 June 2024(78394)
Ops Eve Shift Start
TITLE: 06/12 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 9mph Gusts, 6mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.14 μm/s
QUICK SUMMARY: H1 is in the process of relocking and currently up to PREP_DC_READOUT_TRANSITION. We ran into the issue with the OMC DCPDs not having the same gains after the whitening change again, so TJ and I are looking into a fix.
- Wind is low and microseism is trending down
- All other systems nominal
To hopefully avoid the OMC DCPDs getting stuck at wrong values due to OMC_LOCK getting requested DOWN at an inopportune time (more details in alog78275), for now I've commented out the section of code at the end of PREP_DC_READOUT_TRANSITION which does this. I'll think about some replacement code to handle if OMC_LOCK gets stuck here, but it's possible just removing what's there already will be enough.
Changes have been loaded into Guardian and committed to svn.