aLIGO LHO Logbook

LHO General

thomas.shaffer@LIGO.ORG - posted 16:00, Wednesday 11 November 2015 (23325)

Ops Day Shift Summary

TITLE: "11/11 DAY Shift: 16:00-00:00UTC (08:00-16:00 PDT), all times posted in UTC"
STATE Of H1: Observing at 79Mpc for almost an hour
SUPPORT: Keita, Evan G, Jim W, Nutsinee, Cheryl
SHIFT SUMMARY: Had a few issues with the ETMX ISI swinging around. This seemed to also have been my problem with relocking yesterday. After lockloss, I would just wait for it to settle and then begin the normal relocking efforts.
INCOMING OPERATOR: Jeff B
ACTIVITY LOG:
16:08 Joe - To Xarm beam sealing
17:50 Karen - To mech room
18:04 Karen - Out
18:51 Odd 100Hz hump in DARM, and the RF45 noise seemed to pick up very slightly. This lasted only about 30 sec.
19:22 Lockloss - See alog
20:22 Observing
21:15 - Joe to Xarm beam sealing
21:54 - Start of odd ISI movement, this will later cause a lockloss
22:01 - Control signals look as though it will break lock at any moment so we added 3dB to the DHARD gains (suggested by Nutsinee)
22:02 - Lockloss
23:23 - Joe - back
22:31 - PRMI to DRMI transition Failed
23:18 - Observing