aLIGO LHO Logbook

LHO General

ryan.short@LIGO.ORG - posted 16:36, Friday 23 January 2026 (88875)

Ops Day Shift Summary

TITLE: 01/24 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Another productive day to wrap up the week.

HAM7 alignment is essentially finished and irises are being removed from the table this afternoon
The viewport assembly was removed from HAM5 in preparation for the relay tube to HAM7 to be reattached, which will happen next week in laser safe conditions (see alog88876)
Alignment in HAM1 continued for the JAC, including downstream pointing into HAM2.
Work progressed on the to-be-installed JAC EOM in the optics lab
Jeff took some transfer functions on the OPO suspension and claims they're "good enough to say the suspension looks healthy" after finding issues with open-light values (see alog88872)

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
----	SAF	LVEA IS LASER HAZARD	LVEA	YES	LVEA IS LASER HAZARD	Ongoing
15:50	FAC	Nellie	FCES	N	Technical cleaning	16:10
15:52	FAC	Kim	LVEA	-	Technical cleaning	17:09
16:10	FAC	Nellie	EY	N	Technical cleaning	17:00
16:43	FAC	Randy	LVEA	-	Measuring on BSC2 platform	17:43
17:00	FAC	Nellie	MY	N	Technical cleaning	18:04
17:34	VAC	Jordan	LVEA	-	HAM7 viewport disassembly	19:37
17:38	SQZ	Kar Meng	LVEA	Y	Beam alignment on SQZT7	18:38
18:05	JAC	Jennie, Marc	LVEA	-	Checking JAC PZT electronics	18:21
18:22	SQZ	Sheila	LVEA	Y	Check in w/ Kar Meng	18:38
18:38	VAC	Mitchell	LVEA	-	HAM7 viewport disassembly	19:33
18:48	JAC	Keita, Matt	Opt Lab	N	JAC EOM work	21:09
19:16	JAC	Sheila, Jennie, Sophie	LVEA	Y	JAC installation	20:39
20:29	PEM	Robert	LVEA	-	Laser vibrometry	20:53
20:40	SUS	Jeff	CR	N	OPO closeout transfer functions	00:21
21:07	PEM	Robert	LVEA	-	Laser vibrometry (lights off)	21:32
21:33	VAC	Jordan, Tony, Kar Meng	LVEA	-	HAM7 purge air tutorial	21:53
21:57	JAC	Sheila, Jennie, Sophie	LVEA	Y	JAC alignment	Ongoing
22:20	JAC	Keita, Matt	Opt Lab	N	JAC EOM work	Ongoing
00:12	PEM	Robert	LVEA	Y	Covering viewport HAM4	00:23
00:17	SQZ	Kar Meng, Tony	LVEA	Y	HAM7 cleanup	Ongoing