aLIGO LHO Logbook

LHO General

corey.gray@LIGO.ORG - posted 16:41, Tuesday 31 December 2019 - last comment - 17:45, Tuesday 31 December 2019(54197)

Transition to EVE Log

TITLE: 01/01 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
    SEI_CONF state: MORE_WINDY
    Wind: 19mph Gusts, 13mph 5min avg
    Primary useism: 0.13 μm/s
    Secondary useism: 0.37 μm/s

Very windy drive in! Average speeds are currrently under 20mph (but with gusts up to 20mph)...there have been avg speeds at 25mph for a good chunk of the day with gusts over 40mph a few times.
QUICK SUMMARY:

H1's been down since ~12utc (4am Pacific time) or almost 13hrs so far.

Summarizing Current Status of H1 and what Cheryl mentioned during hand-off:

ISC_LOCK: READY (since 23:51)
OBSERVATORY MODE state: CORRECTIVE MAINTENANCE
SEI_CONF state: VERY_WINDY
IMs: Cheryl said these had slight shift after the Model Crash, have not been changed, and should be fine.
IMC: has been locked after SUS adjustments (IM2 pit by Keita/Ed & IM3 yaw by Cheryl/Ed)
Ifo Alignment:
- Cheryl's gone through (2) alignments. For the second one she noted that INIT_ALIGN did not complete SRC.
- She went through the AS_CENTERING_OFFLOADED section by hand
- She tried going through SQZ_ALIGN_OFFLOADED
Ifo Locking: Has made it up to CARM ON TR a couple of times
SDFs: Noted SEI SDF diffs come up for TRamps with a Set Point of 0 (wondering if it should be non-zero

My Plans For The Evening:

Review all SDF Diffs
Contact Keita to give him a status update.
Continue Ifo locking as is.
Transition SEI_CONF to WINDY & try Ifo locking
Run another Initial Alignment
Look at IMC, IMs, anything else?

Comments related to this report

corey.gray@LIGO.ORG - 17:03, Tuesday 31 December 2019 (54199)

Link

Addendum: Contacted other observatories & gave Keita an update

Gave LLO & Virgo our status (via TeamSpeak)
Phoned Keita (Local Run Coordinator) with status of H1.
- Might have issues with remote operations on his computer, so might need to work with Jenne/Sheila if I need additional help is needed (although he seemed to have better luck when I was on the phone with him).
- One item Keita was concerned with was Guardian nodes (earlier Ed/Cheryl mentioned some SUS guardian nodes being in a STALLED state). Keita & I will begin scanning all Guardian nodes, and in parallel, I will continue locking H1.

corey.gray@LIGO.ORG - 17:45, Tuesday 31 December 2019 (54201)OpsInfo, SEI

Link

Contacted Jim regarding "SEI Land". With regards to the following he said:

1) SEI_CONF in MORE_WINDY state: We should be fine for locking in this state as long as microseism isn't big. (it's about "average" at 0.3um/s which is between the 50th & 90th percentile). We currently have avg wind speeds just under 30mph (so it's picked up again) & have had gusts just under 60mph! :-/ So will stay in MORE_WINDY. This is operating normally.

2) Lots of SPM Diffs for TRamps for SEI Guardian nodes: Jim is not worried about these and said we can ACCEPT them when we are at NLN. This is normal.

3) BRSx rung up a little and went to the DAMPING state: This happens when we get winds at 20mph (which we have) & this broke lock for green arm. This is operating normally.