Reports until 16:34, Tuesday 16 September 2025
LHO General
thomas.shaffer@LIGO.ORG - posted 16:34, Tuesday 16 September 2025 - last comment - 12:44, Wednesday 17 September 2025(86969)
Ops Day Shift Start

TITLE: 09/16 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Lots of work today to understand our troubled IFO as well as some maintenance items. We perhaps have narrowed down the change from the power outage and have changed the input power into the PMC to bring us back to a similar place. We have run an initial alignment, which probably could have run automated, and we are now going through PRMI/DRMI for a second time. I accepted some SDFs in safe before we started locking, see screenshots attached.

BRSY was rung up during some work at EY today, and doesn't seem to be damping. I've contacted Jim, but we will keep an eye on it.


LOG:

Start Time System Name Location Lazer_Haz Task Time End
14:36 SYS Randy, Mitchell, Chris EY n Craning spiral staircase out 16:36
14:58 FAC Contractor (C&E) Vertex n Fire hydrant repair in vertex area near FCBTE 20:19
15:11 CDS Ken LVEA n HAM5/6 cable tray install 19:04
15:17 FAC Nelly LVEA n Tech clean 16:40
15:33 SPI Jeff Opt Lab n Parts 15:38
15:34 - Jennie, parents LVEA n Tour 16:11
15:35 CDS Fil LVEA LOCAL IOT2 table enclosure lights 15:59
15:38 VAC Janos, Travis MY n Pump work 19:22
15:45 ISC Camilla Opt Lab n Grab equipment 15:50
15:46 ISC Camilla, Sheila LVEA LOCAL IOT2 table checks 17:09
15:46 PSL Jason, Ryan S PSL enc YES PSL FSS adjustment 18:54
15:56 PEM Ryan C LVEA n Dropping off dust monitor testing equipment for the PSL team 15:58
16:00 SUS Ryan C EX n SUS charge meas. 17:59
16:15 SEI Jim LVEA n Replace CPS card for HAM3 17:09
16:41 FAC Nelly PSL enc YES Tech clean 16:46
16:41 SYS Betsy LVEA n Mega clean room sock meas. and check on status of work 16:55
16:52 ISC Elenna LVEA n Unplugged SR785 and other test equipment 16:52
17:24 FAC Nelly EX n Tech clean 17:58
17:32 VAC Gerardo, Jordan LVEA n AIP check at HAM6 17:38
17:33 FAC Tyler Mids n 3IFO checks 18:33
17:59 FAC Nelly HAM Shack n Tech clean 18:34
19:59 CDS Marc MY n Grabbing a chassis 21:36
20:20 PSL Jason, Ryan S PSL enc YES Table test 21:55
20:27 VAC' Gerardo, Camilla LVEA n Lookng for viewport covers 20:46
20:46 VAC Gerardo LVEA n HAM6 AIP 20:48
20:54 PCAL Francisco PCAL lab Local PCAL lab work 21:21
22:28 - Oli LVEA n Sweep 22:49
Images attached to this report
Comments related to this report
david.barker@LIGO.ORG - 12:44, Wednesday 17 September 2025 (86990)
Link

Interestingly we saw a slight rise in the iop duo-tones for all four EY front ends which coincide with the spiral-staircase craining.

Plot shows all four IOP DUOTONE channels, AC2 power strip current usage and building lights. Seqence is

07:51 lights on

08:04 duo tone rise

09:13 duo tone starts dropping, AC2 less noisy

09:32 lights out

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