TITLE: 12/02 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Microseism
INCOMING OPERATOR: N/A
SHIFT SUMMARY:
See mid-shift summary for beginning of the shift.
For the 2nd half of the shift ended up moving away from alignments and locking and with Sheila focusing on the PRMI lock---namely why POP18 & 90 were so low in power. Toward the end of the shift Sheila noticed how POP18 had been slowly drifting down in power for PRMI_ASC. So she started walking PR2 + PR3 (along with a little PRM) in yaw. And she was able to increase the PRMI powers.
Remember this is with several Optics with new Offsets!
I continued walking PR2 + PR3 (along with a little PRM) in pitch (& also revisiting yaw), but I don't know if I improved the powers much more than what Sheila did....maybe a little. After going in circles walking optics for PRMI w/ NO ASC (POP18 was touching 80 counts), went to PRMI_ASC---this took POP18 up to 90+! (at the beginning of the shift it was down around 50).
Let ISC LOCK continue, and DRMI locked all on its own.
I will take ISC_LOCK to NOMINAL LOW NOISE and see how it goes. I imagine there could be some possible violin mode issues, but we'll see.
I should say, more walking of PRMs could possibly improve PRMI's POP18, but basically we are back to PRM powers we had back around Nov17 (NOTE: on Nov10, POP18 was up to almost 100).
H1 currently at MOVE_SPOTS.
LOG: