Displaying report 1-1 of 1.
Reports until 13:45, Sunday 25 August 2019
H1 General
jeffrey.bartlett@LIGO.ORG - posted 13:45, Sunday 25 August 2019 (51506)
IFO Relcoking
   This is a summary of relocking after this morning's lockloss.

Lockloss at 17:39 (10:39) ? All appeared normal at the time 

Had to tweak ALS X to get it to lock and build up power
There were a few lock losses at LOCKING_ASL
    As the X arm locked, the power would immediately drop toward zero until lock broke
    Put ALS X into unlocked state again, and touched up ETM-X pitch
LOCKING_ALS went on without issue

DRMI_1F would not lock
Dropped to PRMI relock sequence, which completed OK
DRMI_1F still did not look good
After 8.5 minutes went to CHECK_MITCH_FRINGES and hand tuned the BS
PRMI locked OK
DRMI_1F locked OK
Stopped at CHECK_AS_SHUTTERS and dresses a bit more out of PRM and SRM

Run the rest of the way up into ENGAGE_SOFT_LOOPS
Lock loss at 18:49 (11:49) 

Again ran up through locking sequence went with no manual intervention

Lock loss at 19:28 (11:28) ? There was an OMC saturation message 42 seconds after entering INCREASE_POWER right at the time of the lock loss

Third automated locking attempt reached NLN at 20:13 (13:13) 

Back in Observing at 20:14 (13:14) 
   There were NO SDF differences to resolve with this relock  
 
Displaying report 1-1 of 1.