Ops Shift Log: 01/14/2020, Day Shift 16:00 – 00:00 (08:00 - 16:00) Time - UTC (PT)

State of H1: Locked at NLN, Range is 116.0Mpc

Intent Bit: Observing

Support: Jenne, Sheila, Rahul

Incoming Operator: Niko

Shift Summary: Relocking after the maintenance window had problems with Y-Arm ALS. Could not get any power buildup. Jenne moved the ETM-Y almost 20ur in pitch to get any flashing. Got the power up to 0.2 and tried INCREASE_FLASHES. This stalled again, so tweaked ETM-Y again. Got the power up to 0.4 and tried INCREASE_FLASHES. This stalled again. Tweaked ETM-Y and got the power up to 0.6. Tried the automation again and had no increase in power. Hand tweaked the power up to 0.8 and waited for the Guardian and WFS to build the power up the rest of the way. There was no improvement in power so I bumped ETM-Y by 0.03, at which point the WFS took the power up to over 1.0 and ALS locked.

A couple things went wrong. First, I had the ALS Guardian log open, sitting on top of the ISC_LOCK Guardian and I did not see the Find Y-Arm by Hand message. Secondly, I did not know that after two tries the INCREASE_FLASHES process stopped.

 

The ETM-Y Violin Mode #20 was rung up to 4.43. Worked with Rahul to damp the mode. Tried moving the gain from 0.5 to 1.0, which increased the ring up. Set the gain to 0.0 and the mode started to come down. It is currently back down to 4.43 and slowly dropping.   

 

Activity Log: Time - UTC (PT)

16:00 (08:00) Take over from Corey

16:00 (08:00) Karen & Vanessa – Into the LVEA for cleaning

16:01 (08:01) Jeff K. – Reconciling SAFE.SNAP

16:05 (08:05) Ed – Working on PUM noise fix

16:05 (08:05) Hugh – Going to HAM7/8

16:30 (08:30) Filiberto – In LVEA cabling around PSL rack

16:45 (08:45) Gerardo – Going into LVEA to trace some pipes

16:45 (08:45) Chandra – Going into the LVEA to work on turbo pumps

16:47 (08:47) Robert – Going to End-Y to check on magnetometer & setup for movies

16:59 (08:59) Kyle – Going to End-Y to make measurements and lay some cables

17:03 (09:03) Jason, Camilla, Karen, & Vanessa – Into PSL enclosure for cleaning and plumbing checks

17:16 (09:16) Robert – Finished at End-Y

17:16 (09:16) Robert – In LVEA to check magnetometer

17:37 (09:37) Bubba – Taking Desert Green over the X-Arm overpass

17:42 (09:42) Robert – Finished in LVEA

17:51 (09:51) Chandra – Out of the LVEA

18:00 (10:00) Dave – Update to SUS ETM-X and ETM-Y Models & DAQ restart

18:03 (10:03) Paradise Water on site

18:03 (10:03) Gerardo – Going to Mid-Y to look at pump installation

18:08 (10:08) Christina – Going into the LVEA for inventory work

18:09 (10:09) Norco on site for N2 delivery to CP7

18:14 (10:14) Ed – Finished with PUM upgrades

18:35 (10:35) Jason & Camilla – Out of the PSL Enclosure

18:39 (10:39) Karen – Going to End-Y

19:00 (11:00) Gerardo – Back from Mid-Y

19:12 (11:12) Hugh – Finished in the LVEA

19:18 (11:18) Ed & Camilla – Doing sweep of LVEA

19:29 (11:29) Dave – Restarting digital video server to fix camera #18

19:30 (11:30) Start relocking after maintenance

19:35 (11:35) Ed & Camilla – Finished with LVEA sweep

19:44 (11:44) Karen – Out of End-Y

19:44 (11:44) Kyle – Out of End-Y

20:56 (12:56) Filiberto – Going to Mid-Y to recover parts

21:29 (13:29) Filiberto – Back from Mid-Y

21:58 (13:58) Locked at NLN

22:01 (14:01) Clear SDF Diffs and back into Observing

22:10 (14:10) Richard – Going into CER to look at network switch – Approved by Betsy

22:12 (14:22) Richard – Out of the CER
00:00 (16:00) Turn over to Niko