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Reports until 16:24, Friday 07 October 2016
H1 General
jeffrey.bartlett@LIGO.ORG - posted 16:24, Friday 07 October 2016 (30314)
Ops Day Shift Summary
Title:  10/07/2016, Day Shift 15:00 – 23:00 (08:00 - 16:00) All times in UTC (PT)
State of H1: IFO is unlocked.  Wind is mostly a Fresh Breeze with gusts up to Near Gale (19 to 38mph). Seismic is slightly elevated but well below the 0.5 line. Microseism is elevated at the corner stations. Unsuccessful locking and the look of the spots indicate an initial alignment is in order. 	   
Outgoing Operator: N/A
 
Activity Log: All Times in UTC (PT)

15:40 (08:40) HFD driving inspection along Y Arm
16:05 (09:05) Evan – LVEA to check REFL9 signal chain
16:18 (09:18) Robert - Into LVEA setting up to look at tables 
16:30 (09:30) Evan – Out of the LVEA
16:35 (09:35) Robert – Out of the LVEA
17:54 (10:54) Richard & Daniel – In CER working on RF9 & RF45 problem
18:05 (11:05) Marc - Going to Mid-Y to recover parts
18:22 (11:22) Marc – Back from Mid-Y
20:08 (13:08) Chandra – Going to CP3 for overfill
20:19 (13:19) Peter & Dave – Going into CER
22:19 (15:19) Robert – Going into LVEA
22:35 (15:35) Robert – Out of LVEA
23:00 (16:00) Turn over to Travis


Shift Details: 10/07/2016, Day Shift 15:00 – 23:00 (08:00 –16:00) All times in UTC (PT)
Support: Daniel, Peter, Kiwamu, Terra               
Incoming Operator: Patrick

Shift Summary:  After commissioners finished working on the REFL9 signal chain through an initial alignment. Locking has been very difficult. 
   First – Trouble with the ISS First Loop. There was an oscillation at 1.6KHz, which was flipping the ISS lock on/off. Kiwamu put the ISS into Manual Mode and was toggling the First Loop on/off until the First Loop came on with no oscillations. This has happened before but not very often and not for some time.  
   Second – When going from DC_READOUT to INCREASE_POWER PI Mode18 would start to ring up very quickly. Twice the lock was broken before I could suppress the ring up. On the third lock, Mode18 started to ring up during RESONANCE. This time was able to damp it before breaking lock, but could not suppress the mode. Spoke with PI Help Desk – Conclusion the mode was rung up past the system’s ability to damp it. The fix was to set the gain to zero and wait for the mode to ring down low enough to where the damping can work. Once things had settled down will bring the gain back on and work with phase to further suppress the mode.      

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