TITLE: 04/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 158Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 8mph Gusts, 5mph 5min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.10 μm/s
QUICK SUMMARY:
TITLE: 04/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 157Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:
LOG:
Minutes before noon and before H1 would hit 22hrs, H1 lost lock most likely due to an earthquake(s) (M.6.1 to 6.6) from Taiwan although it's R-Waves are still inbound. Taiwan has had multiple M5+ earthquakes since 2am (local) this morning!
Closes FAMIS#25988 last checked 77273
- HAM5 H3 has a slightly louder-than-normal peak at 60Hz.
- Stages 1&2 Vs for BS, ITMX, ITMY, and ETMX all have a peak around 16 Hz that is usually not there.
Everything else looks normal.
J. Kissel, J. Warner WP 11821 ECR E2200226 IIET 12161 As Jim and others are starting to build up a good MEDM interface and otherwise use the rest of the HAM1 TT L4C feed-forward infrastructure I installed several moons ago (see 63115 and 63300), we've discovered that I overlooked adding useful test points at the summation point of the DC centering DOFS DC1 and DC2. These "FFHAM1_IN" and "FFTRGT_IN" fast test points, and corresponding EPICs readbacks were added to all the other summation points (CHARD, PRC1, REFLWFS_RF9_I, etc.), I just missed it for the DC centering loops. Attached are screenshots after they're now in place. We'll install these by recompiling, installing, and restarting the h1asc.mdl front-end model tomorrrow during maintenance.
FAMIS 20025
PMC REFL has been on the rise again for the past 5 days or so, perhaps lining up with a slight increase in the average PMC temp output? Unsure if these are related.
Mon Apr 22 10:12:09 2024 INFO: Fill completed in 12min 5secs
Gerardo confirmed a good fill curbside.
TITLE: 04/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
SEI_ENV state: SEISMON_ALERT
Wind: 4mph Gusts, 2mph 5min avg
Primary useism: 0.05 μm/s
Secondary useism: 0.11 μm/s
QUICK SUMMARY:
Happy Earth Day!
Nice night for H1 with lock around 18hrs and clean-range just under 160Mpc & double coincidence w/ L1 for most of this lock (Virgo is in a troubleshooting state for most of this time).
Microseism has been turning around since 24hrs ago and is mostly below the 50th percentile.
TITLE: 04/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 156Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: Quiet night, we've been locked for just under 10 hours, PSL Anteroom red dust alarm at 23:32 UTC. I've seen MC1, MC3, and PR3s cameras flash blue a few times. The wind started to calm down around 06:00 UTC and microseism continues to decline.
LOG:
No log
We've been locked for almost 6 hours, the winds picked up and is bleeding into the 0.03 - 0.1 bandwidth. Microseism is decreasing.
TITLE: 04/21 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 158Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 18mph Gusts, 12mph 5min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.16 μm/s
QUICK SUMMARY:
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 154Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:
Nice quiet shift, with one lockloss (which I ran an alignment for, and managed a 168Mpc data point in the last few minutes!).
LOG:
H1's been observing for almost 9hrs and winds have leveled out at around 10mph (gusts to 20mph).
26 min after mid-shift entry, there was a lockloss (happened when I was out making lunch). It is breezy out and we also were running through a 5.4 Mexico eq at the time. Currently re-locking (after a needed Alignment).
Sun Apr 21 10:10:40 2024 INFO: Fill completed in 10min 36secs
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).
H1 back to observing at 21:18 UTC after waiting for ground motion to calm down, but more M5.5+ quakes are inbound from Taiwan.