jeffrey.bartlett@LIGO.ORG - posted 23:59, Friday 21 April 2017 (35714)
Ops Evening Shift Summary
Ops Shift Log: 04/21/2017, Day Shift 15:00 – 23:00 (08:00 - 16:00) Time - UTC (PT)
State of H1: Locked at NLN, 31.0W, and 61.4Mpc or range
Intent Bit: Observing
Support: N/A
Incoming Operator: Travis
Shift Summary: Run A2L check script. Pitch and Yaw are both under the reference. Lost lock – reason unknown; at the time the range was moving around a bit. Relocked with no problems. Accepted SDF Diff with ETMY_L2_DAMP_MODE10_GAIN and back to Observing. Had to damp PI Mode-27 and Mode-28 a couple of times.
Ran A2L check – after relock, Yaw is slightly elevated, Pitch is good.
Locked in Observing for 5.25 hours. After the earlier lockloss, the remaining shift was quiet with no apparent problems. A2L remains at or below the reference.
Activity Log: Time - UTC (PT)
23:00 (16:00) Take over from Nutsinee
01:11 (18:11) Lockloss – Unknown
01:39 (18:39) Damp PI Mode-28
01:41 (18:41) Damp PI Mode-27
01:42 (18:42) Relocked and Observing
01:43 (18:43) Damp PI Mode-28
01:43 (18:43) Damp PI Mode-27
07:00 (00:00) Turn over to Travis