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Reports until 16:32, Thursday 26 March 2026
H1 General
ryan.crouch@LIGO.ORG - posted 16:32, Thursday 26 March 2026 (89654)
OPS Thursday Day shift summary

TITLE: 03/26 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: HAM1 was vented and the bolts have been broken, doors should come off tomorrow. BHSS work continues, and the LVEA is now in Upgrade Laser Safe.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
14:50 FAC Nellie LVEA N Tech clean 16:09
14:52 FAC Kim LVEA N Tech clean 16:09
15:07 FAC Randy LVEA N Checks around HAM1 15:35
15:54 ISC Betsy LVEA N Parts check/search 16:09
16:10 FAC Nellie MidY N Tech clean 16:52
16:11 FAC Kim MidX N Tech clean 17:28
16:28 VAC Travis LVEA N HAM1 purge air dewpoint particle checks 18:46
16:28 FAC Randy LVEA N Craning, checking out handrails 18:57
16:31 FAC Tyler LVEA N Join Randy 16:46
16:31 BHD Elenna, Oli, Keita Optics lab LOCAL BHSS work, first contacting optics Oli out 18:55 20:03
16:39 VAC Jordan LVEA N Join travis, HAM1 vent prep 18:46
16:40 FAC Mitch LVEA N Join Randy 17:25
16:52 FAC Nellie EndY N Drop off water 17:49
16:56 EE Fil LVEA N Cable termination, PSL racks 20:15
17:27 SUS Jeff LVEA N HAM3 check with CDS team 17:30
17:27 OPS Betsy, Tony LVEA N Key off SQZ laser, confirm we're in Upgrade Vent Safe, then move tables by HAM1 17:54
17:28 FAC Kim H2 N Tech clean 17:39
18:18 EE Tony, Marc VAC prep/Optics lab N Cabling 19:20
18:26 FAC Kim LVEA N Tech clean 19:16
18:37 EE Thomas Vac prep lab N Make some invac cables 23:20
18:53 FAC Tyler+contractors MidY N Inspections, dpt of health+1more... 20:23
19:43 SQZ Sheila LVEA LOCAL SQZT7 local laser hazard for Green alignment 19:59
19:58 FAC Randy LVEA N Work on BSC2 platform 21:25
20:13 SQZ Sheila, Sophie FCES Y SQZT8, LOCAL hazard 21:51
20:29 EE Marc, Tony Optics lab N Cable testing 21:17
20:49 VAC Jordan, Travis LVEA N GV7, swap regulator 21:50
21:11 EE Fil LVEA N HAM3 cable terminations Ongoing
21:19 BHD Elenna, Keita Optics lab LOCAL BHSS work Ongoing
21:39 OPS Betsy, Tony, Randy LVEA N Turn off the SQZ laser and move the Tables by HAM1, for real this time, randy out 2215 22:37
22:05 EE Marc LVEA N Join Fil in cabling Ongoing
22:08 PEM RyanC CER N Grab DM cable 22:15
22:37 VAC Jordan, Tony, Travis LVEA N Anulus ion pump, then break bolts on HAM1 Ongoing

17:00 UTC Jordan went over the VAC checklist and I confirmed the picomoters were off, the JAC PZT scan was disabled and its Driver offset was 0, and that the ISI and HEPI were in their safe states.

17:08 UTC HAM1 pressure starts to rise

17:11 UTC ISI HAM1 wd tripped

20:27 UTC Red alarm Dustmon6 by HAM6, 10.8k and 17.5k counts for the 0.3 and 0.5 um particles

21:58 UTC The SQZ laser was keyed off, The LVEA is now in Upgrade Laser Safe

22:00 UTC The tables by HAM1 were moved

23:05 UTC HAM2 ISI tripped from the HAM1 crew breaking the bolts, and the HAM1 sw watchdog

23:09 UTC RM1 and RM2 wd tripped, the HAM1 CPSs were glitching as well

23:31 UTC HEPI HAM1 watchdog tripped

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