edmond.merilh@LIGO.ORG - posted 19:02, Wednesday 18 September 2019 - last comment - 20:20, Wednesday 18 September 2019(52024)
Lockloss and Recovery 01:08UTC
Lockloss at 01:08:
Re-lock attempt -1
- Failed to find IR
- TRX_NORM_INMON showing offset
- lowered TRX-QPD_B_SUM from 1.7xxx to 1.5 to zero the offset
- ran the down script again
- TRX_NORM_INMON showing offset
- FIND_IR working properly now
- DRMI lock was a bit weak
- hand aligned skightly @ CHECK_AS_SHUTTERS
- Lock failed at RESONANCE
Re-lock attempt -2
- CHECK_MICH _FRINGES
- PRMI
- OM1 AND OM2 saturated and unclearable
- going down and then try again
Re-lock attempt -3
- constant OMC Verbals and OM1 and OM2 fully saturated again
- going down for initial alignment
02:02 Initial Alignment
02:17 Re-lock attempt -4
Re-lock attempt -5
03:17 H1 Observing
An hour spent trying to salvage a re lock.
1hour and 15 minutes - IA with relock (and ancillary aligning) <--- my new default approach.