aLIGO LHO Logbook

H1 General

ryan.crouch@LIGO.ORG - posted 16:36, Tuesday 10 March 2026 (89446)

OPS Monday Day Shift Summary

TITLE: 03/10 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Alignment work today, green arms, Xarm IR, MICH, PRX alignment is being worked on as of the end of day shift.
LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
15:09	FAC	Nellie	MidY	N	Tech clean	15:30
15:28	ALS	Sheila, Camilla	LVEA	LOCAL	ISCT beatnote alignment, Camilla turn on CO2 and SQZ lasers	16:07
15:54	FAC	Kim, Nellie, Randy	LVEA	N	Move clean room, N bay to W bay, K/N out 16:19UTC	16:42
15:56	BHD	Oli	Optics lab	LOCAL	Parts search / checks	16:26
16:09	FAC	Tyler+Contractors	Site	N	Fire inspections	20:36
16:21	EE	Marc	CER	N	Check on cables, measure video cable	17:12
16:43	FAC	Randy	EndY	N	Checks	17:13
16:52	SEI	Jeff	Optics lab	LOCAL	SPI	19:24
17:02	BHD	Oli	Optics lab	LOCAL	Helicoil HXDS alignment tooling	17:52
17:15	EE	Marc	Mech room	N	Turn on SQZ HV	17:21
17:20	FAC	Eric	OSB	N	Shut off AH 4 - offices	17:38
16:40	FAC	Kim	HAM Shaq	N	Tech clean	17:23
17:23	FAC	Kim	MidX	N	Grab supplies	17:45
17:27	TCS	Sophie	Prep lab	N	CHETA work	19:32
17:30	ISC	RyanS, Jennie	LVEA	LOCAL	HAM1 JAC table work	18:50
17:45	FAC	Kim	EndX	N	Tech clean	18:45
18:04	EE	Marc	LVEA	LOCAL	Check on JAC cable	18:18
18:39	SEI	Jim	LVEA, then optics	N	HAM6, move parts to optics lab	18:50
19:04	ICS	Sheila, Jennie, RyanS	LVEA HAM1	LOCAL	JAC work	19:17
19:41	ISC	Sheila, RyanS	LVEA HAM1	N	JAC table measurements	19:52
19:55	FAC	Kim	LVEA	N	Stock garb	20:28
20:27	BHD	Oli	Optics lab	LOCAL	BHSS work	Ongoing
20:31	EE	Marc	MidY	N	Get cables	21:30
20:36	FAC	Tyler	Beamtube	N	Install new speed limit signs	21:36
21:00	VAC	Jordan	LVEA, Ybeam manifold	N	Anulus ion pump troubleshooting	21:48
21:28	ISC	Jennie	LVEA	LOCAL	ISCT1 table beam check	21:48
22:08	SEI	Jeff	Optics lab	LOCAL	SPI	23:12
22:17	BHD	Camilla	Optics lab	LOCAL	BHSS	Ongoing
22:48	TCS	Sophie	Prep lab	N	CHETA work	Ongoing

16:00 TEST T629846
Sheila and Camilla went out to ISCT1 and fixed up the ALS beatnotes, DIFF went from ~ -12.0 -> ~ -10.0, and COMM went from ~ -33 to ~ +3.0.
Sheila unlocked the PSL rotation stage, I turned up the power to 2Ws, Sheila left the PSL rotation stage unlocked.
18:41 UTC I restarted standdown_alerts
18:48 UTC Firepump testing, 1 & 2
JAC team encounted an issue regarding a missing cable for the JAC PD shutter
20:00 UTC We started to work on the XARM IR alignment
20:26 UTC We ramped up to 10Ws for MICH
The Optics Lab will have a laser running unattended overnight like yesterday, the signs will be put up when people are done working in that lab and the laser is shuttered.