aLIGO LHO Logbook

LHO General (ISC)

corey.gray@LIGO.ORG - posted 00:53, Sunday 05 May 2019 - last comment - 02:05, Sunday 05 May 2019(48991)

Local EQ Recovery: Two Consecutive locklosses during ENGAGE ASC step. :-/

First attempt at locking had a lockloss at ENGAGE_ASC_FOR_FULL_IFO (where, POP90 started to increase & then a lockloss).

Giving it another try and watching during the step noted above. If it drops out, will try an alignment.

Comments related to this report

corey.gray@LIGO.ORG - 01:05, Sunday 05 May 2019 (48992)

Snapshot of strip tool.

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corey.gray@LIGO.ORG - 01:49, Sunday 05 May 2019 (48993)ISC

First Locking Attempt Post-Initial_Alignment

POP90 was a little lower than previous two locks.
Paused at PREP_ASC_FOR_FULL_IFO
- PRC GAIN was lower than previous locks, but was getting noisier during this pause
went to ENGAGE_ASC_FOR_FULL_IFO (where we dropped out of lock previous two times)
- PRC Gain (& most other LSC signals on striptool) immediately dropped, and
- LOCKLOSS.
Attempting to another lock...will try to quickly go through PREP_ASC_FOR_FULL_IFO without a pause....but we'll see.
Marking OBSERVATORY MODE to CORRECTIVE_MAINTENANCE
Other note is interferometer continues to not FIND_IR on its own anymore.

corey.gray@LIGO.ORG - 02:05, Sunday 05 May 2019 (48994)