Reports until 15:42, Tuesday 18 November 2025
LHO General
thomas.shaffer@LIGO.ORG - posted 15:42, Tuesday 18 November 2025 (88152)
Ops Day Shift End

TITLE: 11/18 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: Happy end to O4! After 4 hours of maintenance today, we relocked mostly automatic with one hiccup in the SQZ_FC guardian that was using a DC0 GPS channel that temporarily didn't exists due to the 0-leg data concentrator work that is still on going. We have been locked for almost 2 hours now and the PEM team is at work running end of run characterization.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
15:37 FAC Randy Yarm n BTE sealing MY -> CS 22:54
16:00 VAC Norco EY n LN2 fill 18:51
16:20 VAC Norco MY n LN2 fill CP3 - fill complete 20:46
16:20 FAC Erik EX n Glycol inspect 16:45
16:34 CDS Fil LVEA n JAC cable pull from CER to HAM1 20:01
16:35 SUS Ryan C CR/EY/EX n SUS oplev charge meas. 18:51
16:36 FAC Tyler CS, Mids n 3IFO checks 18:06
16:39 VAC Travis, Jordan EY n Purge air line work 18:32
16:43 VAC Gerardo CS n Run purge air 19:16
16:47 FAC Nellie, Kim LVEA n Tech clean 18:12
16:54 CDS Marc LVEA n Joining Fil in the cable pulling 20:04
17:19 PEM Robert, Sam, Genevieve LVEA n Move a shaker 18:49
17:43 CDS Richard LVEA n Check on the HAM1 cable pull 18:05
17:47 PROP Christina EY n Check at EY 18:17
18:04 VAC Travis, Gerardo EX n Turning on compressor 19:20
18:12 FAC Nellie EY n Tech clean 19:12
18:12 FAC Kim EX n Tech clean 19:53
18:50 PEM Sam LVEA n Taking pictures 18:59
19:31 FAC Kim FCES n Tech clean 20:00
19:32 VAC Travis EX n Turn compressor off 19:51
19:49 PSL Jason CR n Ref cav tweak 20:00
20:01 PEM Robert LVEA n Setup meas. 20:46
20:16 SUS Oli CR n IFO quiet time 20:27
20:16 PEM Ryan S CR n PEM mag inj 22:05
20:28 PEM Sam LVEA n More pictures 20:31
21:04 ISC Daniel CER n Picture 21:08