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Reports until 16:31, Friday 31 July 2026
LHO General
thomas.shaffer@LIGO.ORG - posted 16:31, Friday 31 July 2026 (91359)
Ops Day Shift End

TITLE: 07/31 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
SHIFT SUMMARY: The final bits of the CDS upgrade continued today, as well as some SQZ and michelson commissioning. The LVEA is currently in Operations SAFE. 

The corner station continues to be pumped down, pressures are around 4e-7torr. The HAM1 pressure has been a concern when using the JAC heater this week, but I think we may have been scaring ourselves. The HAM1 pressure changes diurnally regardless of whether the heater is on or off. We have seen a pressure response from turning on the heater, but this diurnal effect might be the dominating factor. Looking at LVEA temps around HAM1 it tracks well with the local temperature. 


LOG:

Start Time System Name Location Lazer_Haz Task Time End
13:33 DAS Jenne, Wanda, Shoshana, Gizem Yarm, Xarm inside N Hitting things with hammer 17:09
16:05 CDS Jonathan MSR n Troubleshooting iopsush12 16:13
16:12 FAC Kim LVEA n Tech clean 17:13
16:21 SUS Ryan C CR (Ends) n EX & EY sus charge meas. 18:03
16:38 SQZ Sheila, Rahul LVEA LOCAL SQZ alignment with refurb ZM5 19:38
17:37 VAC Gerardo, Travis EY n BSC6 annulus work 18:25
17:39 VAC Gerardo LVEA n Grabbing lifting hardware for EY 17:49
17:57 ENG Betsy Opt Lab n Parts 18:03
18:01 SAF Ryan C LVEA N -> n Transition LVEA from Upgrade laser safe to Operations lasre safe, open light pipe 18:31
18:08 DAS Wanda EX, vertex n Looking for glasses 18:31
18:20 SQZ Daniel LVEA LOCAL Look at ZM4 electronics 18:49
19:31 FAC Randy LVEA n Measuring around BSC1 19:58
19:37 SEI Shoshana LVEA n Turning on CRS laser 19:41
20:43 VAC Gerardo, Travis LVEA n Checking on HAM2 pumps, disconnecting 20:56
20:45 SQZ Sheila, Rahul LVEA LOCAL Open HAM7 to HAM5, check alignment 21:45
20:52 CDS Dave CER, CUR n iopsush34 troubleshooting 21:50
21:34 CDS Richard CER n Checking in on iopsush34 work 21:35
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