aLIGO LHO Logbook

LHO General

austin.jennings@LIGO.ORG - posted 16:00, Friday 03 November 2023 (73953)

Friday Shift Summary

TITLE: 11/03 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Aquisition
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

- EX saturation @ 16:24

- 18:21 - inc 5.6 EQ from Nepal

- 18:52 - inc 5.1 EQ from Russia

19:04 - EQ mode activated, back to CALM @ 19:24

- Lockloss @ 20:18, caused by MICH FF test

- Relocking:

Had to manually find DIFF again, looks like it went past the peak by a few clicks
H1 went through PRMI and CHECK MICH, IFO still couldn't lock, so I will be running an initial alignment
Relocking the second time was automated, ran into the IFO OUT saturation at PREP/ENGAGE ASC upon relocking, first mentioned by Tony here
Back to NLN @ 21:54

- Lockloss @ 22:08, due to PUM crossover measurement

- Relocking:

DIFF was not found again, passed peak resonance
H1 went through PRMI again
Same strange IFO saturations at PREP/ENGAGE ASC
Back to NLN @ 22:56

- 22:43 - PSL DM 102 alert 300 nm, counts spiked to 310

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
15:58	FAC	Karen	Optics Lab/VAC Prep	N	Tech clean	16:17
16:00	FAC	Tyler/Eric	CER	N	Rack work	19:16
16:36	PEM	Robert	EX	N	Change frequency of pump	18:06
17:36	VAC	Jordan/Travis	MY	N	Drop off parts	18:02
18:17	CDS	Erik/Fil	Roof	N	Check antenna (staying on platform)	18:27
20:10	ISC	Naoki	CR	N	MICH FF tuning	20:21
20:11	PEM	Robert	EX/Y/CER	N	Grab parts/set up	21:09
20:28	VAC	Travis/Jordan	LVEA	N	Roll in a rack	20:49
20:28	EPO	Jenne + 5	LVEA	N	Quick walkaround	20:49
21:29	VAC	Travis	MY	N	Grab parts	21:49