aLIGO LHO Logbook

H1 General

anthony.sanchez@LIGO.ORG - posted 16:58, Tuesday 29 September 2026 (92107)

Tuesday Maintenance Day OPS Report

TITLE: 09/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY:

Work today:
ISIs on HAMs2 and 3 were both tripped today. But the IMs were trended back using the driftmon scopes found under the slider scopes button on the LSC-->Locking.adl

Dave has an awesome CDS summary link here.

VAC - EX GV 20 Manual open per procedure (will take all day) ----> Still in progress GV19 And GV20 are now both softclosed.
~~Jim - Restart CRSPROC. Some math is missing, add factor 8x that is missing from the contrast calculation for CRS. No daq restart.~~
~~CDS/Jim/Kissel - Restart isiham2-5, seiproc models to switch out which CPS signals are used for reconstructing the ISI DIFF super sensors.~~
~~CDS - isiham6 model restarts to add IPC connections for CRS laser driver~~
~~CDS - Convert all usercode usages of arctan in crsproc~~
~~CDS - observe.snap file updates for 10 models, safe.snap chan updates for: sfc2, susauxb2h34, iopsusb13, calcs~~
~~CDS - virtual machine (proxmox VM) cluster work, hopefully not impacting for if it is, user interfaces will be down for the day~~
Kissel - HAM2-3 driven measurements ???
Fil - Install cable for NN at EY, vac rack to BSC10
~~Fil - install camera at EX in air handler room~~ Kinda..... this one is not working now.
Fil - Investigate 3IFO monitoring signal loss, dust mons offline at times since tied together ---> ?
~~VAC - LN2 delivery CP3 (MY) & CP8 (EX)~~
FAC - Churn test of fire pumps ----> ?

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
14:34	FAC	Randy	X-arm	N	sealing cracks in beam tube enclosure	19:37
14:35	CDS	Jonathan	MSR	N	Prox mox upgrades	16:35
14:55	FAC	Kim	EY	N	Technical cleanin & resupply	17:17
15:21	FAC	Christina	Woodshop & receiving.	N	Forklifting parts.	16:21
15:24	FAC	Chris	LVEA	N	spot painting the LVEA walls.	17:54
15:50	SUS	Oli	CR	n	BS meas	16:05
16:09	EE	Fil	EX	N	Camera Work	18:16
16:13	Tour	Elenna + 5	LVEA	N	LVEA tour	16:50
16:14	FAC	Kim	LVEA	No	technical Cleaning & Resupply	19:03
16:46	CDS	Dave	Remote	N	Restarting ALL HAM Models except 6	17:31
16:47	PEM	Miranda	Mech room	N	Taking pictes of SEI PEM kits.	16:53
16:48	EE	Marc & Arnaud Jim	LVEA	N	Pulling CRS Cables. Marc out early	19:55
16:49	DetEng	Betsy	CER	N	Getting parts.	16:59
16:54	VAC	Travis & Jordan	LVEA	N	Looking for tools.	17:03
16:57	TCS	Camilla	LVEA	Yes	Working on cheta	18:09
17:32	CDS	Dave	Remote	N	DAQ restarts for SEIPROC ,CRSPROC for HAM6	18:05
17:58	VAC	Gerardo, Travis, Jordan	EX	n	Closing GV19	19:58
18:12	TCS	Camilla & James	LVEA	N	Moving the CHETA table.	18:39
18:37	EE	Fil	EY	N	Camera Work	19:51
18:40	TCS	Camilla	CHETA Lab	yes	plugging in a cheta to the beckhoff.	18:50
19:36	FIT	Noah	X-arm	N	Running X arm	20:15
19:49	FAC	Randy	X-Arm	n	Sealing Beam tube enclosure.	21:41
20:19	VAC	Tyler, Besty, Jordan, Gerardo, Travis	EX	N	working on GV20	23:16
22:40	SEI	Jim & Arnaud	LVEA	N	working on CRS near TCS rack	23:21
23:10	PCAL	Carolyn, Tony	PCAL Lab	Local	Loosening screws to get a better measurement	23:43
23:17	FAC	Tyler	EX	N	Last min EX Vac work	00:17