cheryl.vorvick@LIGO.ORG - posted 15:03, Monday 10 December 2018 - last comment - 15:18, Monday 10 December 2018(45817)
Locking issues Sunday related to IM2
IM2 starts during 9 dec 2018 17:19:26, GPS 1228411184, and it continues to move away from nominal until around 21:00, and recovers to a reasonable alignment 23:30:
MC1 also has a glitch, which in diaggui looks to start after IM2.
Attached Plots:
- entire IM2 event
- the start, showing IM2 and ISS second loop QPD, the QPD suggests it starts earlier than IM2
- close up of the start showing that at 0.62s into the plot, MC1 and IM2 are
Images attached to this report
Comments related to this report
CHANGE IN ALIGNMENT WITH POWER UP: (just before glitch)
Images attached to this comment
EOM OUT AND PMC TRANS GLITCH AND SHOW LEVEL CHANGES WITH ROTATION STAGE MOTION: (beams seen on PMC Trans face, and beam from the IMC has been located on the PSL, so it seems some light is getting back into the PMC.
Images attached to this comment
Multiple power up/down cycles, showing IM2 and MC1 alignment.
Images attached to this comment
