TITLE: 06/04 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:
Just put the detector in DOWN for the night (and for Matt's IM test tonight). Elenna and I have been unable to fully lock DRMI for the past hour:
- one (1) lockloss during ACQUIRE_DRMI_1F while we were trying to figure out why we couldn't continue, and eventually realized it was due to unset limiters for DC6 (84782)
- two (2) of the locklosses were from ENGAGE_DRMI_ASC and ACQUIRE_DRMI_1F, where a fast oscillation took us out (16.2Hz in MICH, 30Hz in POP) (seen earlier 84769)
- two (2) locklosses after that were from ACQUIRE_DRMI_1F and were for seemingly no reason - we were not seeing any BS oplev glitches, but something did seem to be kicking the BS every so often while trying to acquire. The oplevs weren't seeing any kicking in the states before ACQUIRE_DRMI_1F
State of today's tasks (posted in my shift start alog, here are their updates):
- Check PRM offset in DRMI ASC DONE
- Craig & Matt rephase LSC POP in lownoise DONE 84776
- Craig & Matt check PRCL/SRCL sensing/inputmatrix DONE 84776
- Elenna measure LSC FF IN PROG
- Vicky & Kevin sqz measurement of SRCL offset do Wed morning after FF fixed
- Check laser noise suppression state no good, check REFL B
- Vicky & Kevin other sqz stuff (in parallel w/LSC stuff)
- CHARD P low noise DONE
- * Matt overnight IMC measurement IN PROG
- ISS realignment onto array
- * Check CHARD Y now that DC centering is fixed
LOG:
22:55UTC Lockloss from LOWNOISE_LENGTH_CONTROL due to commissioner error
23:30 Lockloss from ENGAGE_DRMMI_ASC
02:37 Lockloss during LASER_NOISE_SUPPRESSION
- ran a manual initial alignment
03:48 Lockloss from ACQUIRE_DRMI_1F due to the limit for DC6 being set to 0 and ISC_DRMI thinking that DC6 was railed (84782)
03:52 Lockloss from FIND_IR
04:00 Lockloss from ENGAGE_DRMI_ASC due to fast oscillation (same as 84769)
04:21 Lockloss from ACQUIRE_DRMI_1F due to fast oscillation (same as 84769)
04:36 Lockloss from ACQUIRE_DRMI_1F
04:43 Lockloss from ACQUIRE_DRMI_1F