aLIGO LHO Logbook

LHO General

thomas.shaffer@LIGO.ORG - posted 16:30, Friday 28 August 2026 (91723)

Ops Day Shift End

TITLE: 08/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

Started out doing some clipping investigations in single bounce and SR2 AS_C centering on - 91727
Locked PRMI, maximized by hand, then Louis started spot measuring on PRM, then OLGs on MICH, PRCL - 91726 , 91724
BS osem calibrations
PRMI locking but with ALS locked off resonance
- To get here we went through SDF revert after checking SDFs first

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
17:02	SEI, CC	Mitch	Ends	n	FAMIS HEPI checks and CC checks at EX	17:46
17:07	PEM	Robert	EX	n	Grounding investigation	18:13
22:36	PEM	Robert	EX	n	Grounding investigation	00:36
22:39	-	Mike, Daniel, Tourist x2	LVEA	Y	Tour	00:09
22:52	SEI	Jim, Shoshana	CER	y	Checking on CRS damping signal	23:04
23:19	SUS	Sheila, Mark	EY	n	Checking on ESD	00:19