Reports until 08:05, Friday 07 August 2026
H1 General (SUS)
anthony.sanchez@LIGO.ORG - posted 08:05, Friday 07 August 2026 - last comment - 09:00, Friday 07 August 2026(91441)
Friday Ops morning shift report.

TITLE: 08/07 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 1mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s 
QUICK SUMMARY:

I came in this morning to a Vacuum Alarm on H0:VAC-EX_X2_PT524_PRESS_TORR. Wait! Dont panic! Vac Team had already put in an alog about it. 
Other than that Every thing looks good.... EXCEPT:  the RMS 1 & 2 are saturating for some reason. Tagging SUS
This started to happen at a round 7  UTC .  I took those Suspensions to Safe.

Comments related to this report
anthony.sanchez@LIGO.ORG - 09:00, Friday 07 August 2026 (91442)
Link

These Saturations were caused by the DC Centering Loops being turned on about 10 seconds after the IMC unlocked. They ramped up and started to saturate the suspensions all night. The solution was to kill the DC centering loops AND clear the History.