ryan.crouch@LIGO.ORG - posted 08:03, Thursday 02 March 2023 - last comment - 08:35, Thursday 02 March 2023(67716)
OPS day shift start
TITLE: 03/02 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 23mph Gusts, 17mph 5min avg
Primary useism: 0.09 μm/s
Secondary useism: 0.83 μm/s
QUICK SUMMARY:
- Lock loss at 11:33 and has been stuck at prep for locking since, IMC_LOCK fault, FSS & PMC unlocked. The PSL went down earlier this morning, seems to have been the cause of the lockloss.
- There was a yellow dust alarm (300nm) in the PSL laser room at 16:00 UTC
- Fairly high winds, low seism
- MX temperature alarm
You can see in the attached figure that the PSL FSS channel became noisy 10 seconds before the 1361792037 lockloss. The H1:PSL-FSS_FAST_MON_OUT_DQ channel has been regularly showing some little spikes (see attached) but normally nothing that big.