aLIGO LHO Logbook

LHO General

thomas.shaffer@LIGO.ORG - posted 16:11, Wednesday 27 March 2024 (76745)

Ops Day Shift End

TITLE: 03/27 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing
INCOMING OPERATOR: Oli
SHIFT SUMMARY: We've been locked for over 4.5 hours and have just transitioned back to Observing for the rest of the evening. The one lock loss we had was possibly cuased by work on the floor. Relocking was straight forward, I ended up moving PRM to lock PRMI in an attempt to avoid an initial alignment. It took 57 min to relock.

1726 Lock loss. HAM1 HEPI tripped
1821Back to low noise
- DRMI/PRMI looked awful when it first arrived. In an attempt to avoid an initial alignment, I let it run a Mich bright, then I moved PRM a fair amount in pitch and yaw to get PRMI to lock. DRMI locked up without issue after this. No other intervention was needed.
- 57min from lock loss to NLN
2308 Observing

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
16:09	VAC	Gerardo	site	n	Forklifting septum from woodshop to LSB receiving	16:39
16:09	ISC	Sheila, Artem	CR	n	ESD bias change	18:09
16:26	ISC	Daniel	LVEA	n	Look at PSL racks	16:45
16:46	FAC	Kim	H2	n	Tech clean	18:46
17:11	SQZ	Julian	OptLab	yes	SHG work	19:32
20:09	ISC	Sheila	LVEA	n	Checking on PSL racks	20:29
22:12	PEM	Robert	LVEA	n	Turn off amps, clean up	22:17
22:19	PEM	Robert	EX	n	Shaker meas	23:14