Reports until 07:43, Tuesday 01 September 2026
LHO General (CDS, PSL)
ryan.short@LIGO.ORG - posted 07:43, Tuesday 01 September 2026 - last comment - 08:09, Tuesday 01 September 2026(91763)
Ops Day Shift Start

TITLE: 09/01 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 4mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.08 μm/s 
QUICK SUMMARY: PSL Beckhoff is down, but apparently the laser is still running? Possibly just a readback issue (PSL overview attached). All CDS cameras appear to be down (blue screen), including PSL enclosure cameras. Will talk to Dave/Patrick about this.

Several Tuesday maintenance activities planned for today, including a Guardian machine reboot, DAQ restart, and some craning in the LVEA.

Images attached to this report
Comments related to this report
ryan.short@LIGO.ORG - 07:54, Tuesday 01 September 2026 (91764)

ISC_LOCK was in 'GREEN_ARMS_MANUAL' with ALS Y locked and offloaded. I took ISC_LOCK to 'DOWN' and SEI_ENV to 'MAINTENANCE' in prep for the Guardian reboot this morning.

ryan.short@LIGO.ORG - 08:09, Tuesday 01 September 2026 (91765)

Cameras and PSL Beckhoff all went dead at the same time last night, 23:47 PDT. Richard confirms the network switch in the CER is dead, which explains why the PSL Beckhoff machine is still running fine even though channels can't be read.