Reports until 08:17, Wednesday 13 December 2023
LHO General
ibrahim.abouelfettouh@LIGO.ORG - posted 08:17, Wednesday 13 December 2023 (74778)
OPS Day Shift Start

TITLE: 12/13 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 6mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.25 μm/s
QUICK SUMMARY:

IFO is attempting to relock after ADC card failure in h1iopseib3. Erik, Richard and TJ worked on this about an hour before shift and got everything up and running again. See alog 74774 for details. EX seems misaligned (due to a trip) so may go through initial alignment if this lock attempt doesn't work.

Currently locking ALS though TJ mentioned lower ALSX/Y arm transmition than usual (by about 0.1/0.2 counts) - a weeklong issue apparently.