aLIGO LHO Logbook

LHO General

ryan.short@LIGO.ORG - posted 08:13, Tuesday 18 July 2023 (71433)

Ops Owl Shift Summary

TITLE: 07/18 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Preventative Maintenance
SHIFT SUMMARY: Large earthquake caused a lockloss about halfway through the shift, then spent the remaining time relocking and damping violins until scheduled injections began.

Lock #1:

Incoming 5.7 Mexico earthquake: EQ mode activated @ 10:31
Lockloss @ 10:33 from quake: alog

Lock #2:

Fully automatic lock once ground motion calmed down
Reached OMC_WHITENING at 11:52 and never reached NLN due to high violins
- Rahul assisted with damping remotely
Magnetic injections started @ 14:20 (usual time; still in OMC_WHITENING so this didn't start automatically)
Intentionally broke lock by flipping H1:IMC-REFL_SERVO_IN2EN @ 15:06

Handing off to Tony for the day.

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
08:58	SUS	Rahul	Remote	-	Tweaking violin damping gains	10:40
12:15	ISC	Ryan S	CR	-	DHARD_Y measurement	13:01
13:29	CDS	Erik	Remote	-	Rebooting workstations, opslogin0, cdsssh	13:49
14:02	FAC	Ken	VPW	-	Conduit installation	Ongoing
14:21	PEM	PEM_MAG_INJ GRD	CR	-	Magnetic injection suite	14:40
15:00	FAC	Tyler, Chris	Outbuildings	-	Fan checks	Ongoing
15:04	FAC	Cindi	OSB Receiving	n	Supplies	Ongoing
15:06	-	Jeff	LVEA	n	Taking photos	Ongoing
15:09	VAC	Gerardo	LVEA	-	Check turbopumps	Ongoing