Reports until 00:14, Monday 25 December 2023
H1 General
oli.patane@LIGO.ORG - posted 00:14, Monday 25 December 2023 (75030)
Ops Eve Shift End

TITLE: 12/25 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: We are Observing and have been Locked for 10 minutes. The lockloss recovery required an Initial Alignment, and while trying to acquire MICH, it was having trouble registering that it was over the threshold because one of the beams was slightly higher than the other, so I needed to adjust the beamsplitter. After that the rest of initial alignment and locking went smoothly.
LOG:

00:00 Detector Observing and Locked for 3.25 hours

05:30 Lockloss (75026)
-- Relocking --
06:03 I took the detector to DOWN because we kept running through CHECK_MICH_FRINGES and needed to run an Initial Alignment
06:08 Started Initial Alignment
    - Detector was having trouble with aligning MICH due to the beams being slightly offset in pitch and thus being too low for the trigger - I had to adjust the BS in pitch quite a bit for it to finally catch
07:06 Initial Alignment complete

07:49 Reached NOMINAL_LOW_NOISE
--Relocking End --

07:52 Into Observing