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Reports until 16:53, Tuesday 16 December 2025
LHO General
ryan.short@LIGO.ORG - posted 16:53, Tuesday 16 December 2025 (88562)
Ops Day Shift Summary

TITLE: 12/17 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Busy afternoon! We changed plans a bit after we remembered that the HAM7 crew needed the IMC locked for their scattered light investigation, so work in HAM1 and the PSL to prep for JAC installation was put on pause. Locking the IMC went fairly smoothly; MC1, MC3, and the IMC PZT were moved back into alignment based on top-mass OSEMs from when the IMC was last locked, and once the light pipe was reopened, the IMC locked without issue. Input power was brought up to 10W at the HAM7 team's request. Scattered light work in HAM7 will continue tomorrow, but for tonight we've shut the PSL light pipe and lowered input power back down to 1W since chambers are open.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
15:57 SAF LASER LVEA YES LVEA is LASER HAZARD Ongoing
15:38 FAC Tyler X-Arm N Tumbleweed clearing 23:32
15:55 FAC Nellie, Kim LVEA N Technical Cleaning 17:11
16:31 FAC Randy LVEA N Craning in north bay 18:11
16:34 TCS TJ LVEA N Checking TCS Cabinets 18:12
16:44 VAC Jordan LVEA N Relay Tube Venting 20:31
17:11 JAC Rahul Optics Lab N Periscope Work for JAC 20:21
17:16 VAC Travis LVEA N Relay Tube Venting 19:39
17:19 VAC Gerardo LVEA N Relay Tube Venting 20:31
17:21 MAT Matt Optics Lab N Laptop retrieval 17:26
17:26 PCAL Tony PCAL Lab N Transfer Standard Measuremenmt 19:03
17:30 FARO Masayuki, Jason LVEA N HAM1 FARO Work 19:25
17:38 EE Fil EY N Cable cleanup, suspension rack 18:44
17:40 SUS Betsy LVEA N HAM1 19:29
17:44 FAC Nellie EY N Technical Cleaning 18:38
17:44 FAC Kim FCES N Technical Cleaning 18:30
17:51 JAC Jennie Optics Lab N JAC 19:14
18:04 TCS Matt Prep Lab N CHETA work 18:43
18:10 FAC Mitchell, Randy LVEA N BSC2 Work 19:27
18:11 SQZ Eric LVEA N HAM7 Grabbing Cavity 18:21
18:20 PEM Robert, Alicia, Jean-Rene LVEA N HAM1 Looking for 30Hz Peaks 19:36
18:20 FAC Richard LVEA N Checking on HAM7 Crew 18:44
18:22 SQZ Daniel, Kar Meng, Eric Optics Lab N Looking at old VOPO 19:12
18:27 PEM Sam LVEA N Accelerometer check HAM1 18:47
18:30 FAC Kim H2 Building N Technical Cleaning 18:41
19:03 TCS Tony MER N TCS chillers 19:16
19:30   Jennie Optics Lab N JAC 20:21
19:36 PEM Jason, Robert, Alicia, Joan-Rene LVEA N Noise hunting 19:40
19:36 FAC Kim LVEA N Technical Cleaning 20:19
20:30 PSL Ryan S LVEA Y Transition to LASER HAZARD 20:42
20:36 JAC Daniel CER - JAC cabling 21:30
20:40 PEM Jason, Robert, Alicia, Joan-Rene LVEA Y PSL Racks 21:07
20:59 FAC Randy LVEA - BSC2 Work 21:33
21:03 JAC Jason, Masayuki LVEA YES Capture alignment in HAM1 22:31
21:05 VAC Travis LVEA Y Checking on pumps 21:05
21:29 CAL Tony PCal Lab N Swapping spheres 21:36
21:32 JAC Betsy LVEA YES HAM1 JAC work 22:56
21:39 SQZ Sheila, Kar Meng, Eric, Daniel LVEA - HAM7 scattered light (Sheila out @ 00:08) Ongoing
21:41 JAC Rahul, Jennie Opt Lab N JAC periscopes 00:51
22:21 VAC Jordan LVEA - Check relay tube 23:07
23:01 PEM Robert PSL Local Tracing cables 00:40
23:10 JAC Betsy, Masayuki Opt Lab N JAC prep (Masayuki out @ 00:24) 00:39
23:18 AOS Richard LVEA - Talking to Sheila 23:23
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