aLIGO LHO Logbook

LHO General

ryan.short@LIGO.ORG - posted 16:00, Friday 16 June 2023 (70522)

Ops Day Shift Summary

TITLE: 06/16 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
SHIFT SUMMARY: Shift was full of earthquakes, keeping us down for several hours.

Lock #1:

Dropped Observing from 16:08 to 16:44 for calibration measurements: alog 70520
Lockloss @ 16:54: alog 70521

Lock #2:

4.9 earthquake from France, lost lock while acquiring DRMI
Relocking went unaided; NLN @ 18:29
Lockloss @ 18:40 (before Observing) from backscatter test at HAM3: alog 70528

Lock #3:

Lost lock at TURN_ON_BS_STAGE_2

Lock #4:

Made it to MOVE_SPOTS before a 6.5 quake from Tonga hit, holding in DOWN until it passes

Lock #5:

Finally was able to lock after ground motion calmed down
Relocking is going unaided (needed to CHECK_MICH_FRINGES and PRMI)

Handing off to Corey, H1 currently at MAX_POWER.

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
15:45	FAC	Karen	Optics/Vac Labs	-	Technical cleaning	16:05
16:12	CAL	Ryan	CR	-	Sensing function calibration meas.	16:46
16:56	CDS	Marc, Jonathan	CER	-	Check on HAM6 camera	17:06
17:06	VAC	Janos	MY	-	Check pump	17:23
17:18	PEM	Robert	LVEA	-	Set up scatter test on HAM3	17:23
18:35	PEM	Robert	LVEA	-	HAM3 scatter test (Wifi on)	18:47
18:47	FAC	Kim	H2	-	Technical cleaning	19:04
21:27	VAC	Janos	EX	-	VAC checks	21:51