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Reports until 08:09, Saturday 01 April 2017
H1 General
jeffrey.bartlett@LIGO.ORG - posted 08:09, Saturday 01 April 2017 (35261)
Ops Owl Shift Summary
Ops Shift Log: 04/01/2017, Owl Shift 07:00 – 15:00 (00:00 - 08:00) Time - UTC (PT)
State of H1: Relocking      
Intent Bit: Commissioning/Locking
Support: N/A
Incoming Operator: Travis

 

Shift Summary: Run A2L check script; Pitch is around 0.6, Yaw is below reference. Lost lock, reason unknown. Had trouble with ALS locking, finding IR and DRMI_1F. Ran initial alignment. On relocking, broke lock, twice on FIND_IR ALS_DIFF. Third time made it all the way to NLN. Back to Observing.

Ran A2L check script. Pitch is up to 0.9, Yaw is OK. Will run correction script when opportunity presents.  

Damping unruly PI Modes 27 & 28

Lost lock a second time, with no apparent cause. Did not need realignment. During FIND_IR lost lock several times during ALS_DIFF. From the log it looked like the offset was being moved from 1368 to 0 and then back to 1368. The lock was breaking on the second jump of the offset to 1368. Made it through FIND_IR just as Travis was coming on shift. Relocking is proceeding.

 

   Activity Log: Time - UTC (PT)
07:00 (00:00) Take over from TJ
07:24 (00:24) Run A2L check script
07:53 (00:53) Damp PI Mode-27
10:12 (03:12) Lockloss – Unknown
11:21 (04:21) Relocked at NLN – In Observing
11:35 (04:35) Damp PI Mode-28
11:39 (04:39) Damp PI Mode-27
11:41 (04:41) Damp PI Mode-27
11:48 (04:48) Damp PI Mode-27
14:39 (07:39) Lockloss
15:00 (08:00) Turn over to Travis
Displaying report 1-1 of 1.