aLIGO LHO Logbook

H1 General

ryan.crouch@LIGO.ORG - posted 19:48, Tuesday 25 November 2025 - last comment - 20:32, Tuesday 25 November 2025(88239)

OPS Tuesday EVE shift summary

TITLE: 11/26 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: We had 2 locklosses, the first was easy to recover from, the second is still in progress. We're at MAX_POWER right now.
LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
00:16	PEM	Rene, Alicia	CER	N	Setup measurement, huddle test	00:33
00:20	ISC	Kar Meng	Optics lab	LOCAL	OPO work	01:13
00:21	ISC	Marc	Optics lab	LOCAL	Help with osciliscope issue	00:59
00:52	PEM	Robert, Sam	EndX	N	Setup measurement	01:20

20:49 UTC lockloss a minute after reaching NLN, there was a big oscillation in EX_L3
22:29 UTC Back to NLN
01:21 UTC lockloss, ETMX glitch
01:35 UTC IA
- 02:41 UTC DRMI finally locks
- 03:12 UTC lockloss at LOW_NOISE_ESD_ETMY

Comments related to this report

ryan.crouch@LIGO.ORG - 20:32, Tuesday 25 November 2025 (88246)

Link

04:10 UTC NLN

04:30 UTC We went into Obseving after I cleared a leftover EX PEM EXC