TITLE: 04/21 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 50Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 12mph Gusts, 9mph 5min avg
Primary useism: 0.05 μm/s
Secondary useism: 0.17 μm/s
QUICK SUMMARY:
H1's been locked 5hrs and after a quiet few hours, seeing breezes starting to pick up in the last 40min. There was a MINOR PSL dust monitor alarm at 2am local (during the winds starting during Ryan C's shift.
No plans for Calibration or Commissioning down time today.
Getting around to finishing the Locking Survey for overnight. Although h1 was down 4hrs, looks like no phone calls for help---H1 battled on during the latter half of last night's wind storm getting fairly far in ISC LOCK (3x to Transition etmx & 2x to carm150pm). And then once the winds got down to 10mph this is when h1 had a chance.
(All in all, H1 was trying for hours on its own and didn't get stuck anywhere through the wind storm [maybe if H1 Manager tried an Alignment it would have helped, but really once the winds died, H1 automatically made it through without an alignment. It was nice to have the Verbal log history go back to follow the story and complete the Locking Survey entry and see how the night went.)
Microseism: also forgot to mention our low microseism has slowly drifted UP over the last 15hrs (from below the 50th percentile line to above it.
I should mention that I did receive a call last night at 02:00 PDT from H1_MANAGER requiring assistance. It looked like H1 was having trouble locking with two locklosses at TRANSITION_FROM_ETMX (very likely due to high winds). As the winds had died down a bit by that point, I decided to let H1 keep trying, as ALS and DRMI were consistently locking easily. On the next lock acquisition attempt, H1 made it to low noise without issue.
So, while H1 did call for assistance overnight due to high winds causing locking difficulties, I did not need to intervene for H1 to eventually reach NLN (and I don't expect doing so would have sped up the process).