Reports until 07:55, Tuesday 09 December 2025
H1 General
anthony.sanchez@LIGO.ORG - posted 07:55, Tuesday 09 December 2025 (88434)
Maintenance Tuesday Start

TITLE: 12/09 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 11mph Gusts, 6mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.54 μm/s 
QUICK SUMMARY:
 SUS in-lock charge measurements did not run due to being unlocked.
HAM7 Door Bolts have been loosened & door is ready to come off.

Potential Tuesday Maintenance Items:
CDS - Log in and check on vacuum system computer (Patrick)
18-bit DACs in iscey should be replaced with 20-bit DACs???
Beckhoff upgrades
installing SUS front-end model infrastructure for JM1 and JM3, and renaming the h1sushtts.mdl to h1sush1.mdl
RELOCK CHECKPOINT IMC
18-bit DACs in h1oaf should be replaced with 20-bit DACs
h1sush2a/h1sush2b >> sush12 consolidation
Upgrade susb123 to LIGO DACs
Add sush6 chassis
DEC 8 - FAC - annual fire system checks around site
MON - RELOCKING IFO  Reached DRMI last night
TUES AM - HAM7 Pull -Y Door
FARO work at BSC2 (Jason, Ryan C)