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Reports until 08:15, Monday 26 June 2017
LHO General
corey.gray@LIGO.ORG - posted 08:15, Monday 26 June 2017 (37134)
Transition To DAY

TITLE: 06/26 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 65Mpc
OUTGOING OPERATOR: Ed
CURRENT ENVIRONMENT:
    Wind: 13mph Gusts, 10mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.16 μm/s

useism took a quick step up between 22:00 - 3:00 to just above the 50th percentile (still low).  See an odd jump up for EY low freq seismic noise at about 14:30utc (no incursions seen on Access System & winds...well, there is a small increase up to 15mph...that is probably it:  local EY wind event.
QUICK SUMMARY:

Ed passed on some PRMI alignment tweeks he tried last night.  L1 has just rejoined us.  Virgo has been down for 7hrs (perhaps their Engineering run is over?).

H1 AOS
edmond.merilh@LIGO.ORG - posted 08:00, Monday 26 June 2017 (37129)
Shift Summary - Owl

TITLE: 06/26 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 65Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:
LOG:

7:25 First locking attempt resulted in NLN for about 5 seconds

7:41 Second attempt: Lockloss at CARM_ON_TR

8:18 Third attempt: After much diddling with PRMI and, basically all PRC optics, I got a better alignment which resulted in A good NLN lock.

8:30 Large glitch

8:33 Bounce modes are still above 10e-15 but coming down. However, there are abnormally high resonances between 10Hz and slightly above roll mode freqs.

08:20 Intention bit Undisturbed

12:56 Lockloss. Nothing obvious

13:43 H1 back into Observing mode

14:34 Spoke to Jeremy at LLO. They're getting aligned and ready to re-lock.

 

 

 

H1 General
edmond.merilh@LIGO.ORG - posted 06:45, Monday 26 June 2017 (37133)
H1 Lockloss and Recovery

12:56UTC Lockloss

13:43 H1 back to Observing

 

H1 General
edmond.merilh@LIGO.ORG - posted 04:07, Monday 26 June 2017 (37132)
Mid-Shift Summary

H1 locked and observing fort 2hr58min @ 65Mpc. There were a couple of glitches. Everything looks fine.

H1 General
edmond.merilh@LIGO.ORG - posted 02:42, Monday 26 June 2017 (37131)
GRB Alert

9:39UTC confirmed with Danny at Livingston.

 

H1 General
edmond.merilh@LIGO.ORG - posted 01:21, Monday 26 June 2017 (37130)
H1 back to NLN/Observing

08:20UTC 66.2Mpc

H1 General
edmond.merilh@LIGO.ORG - posted 00:13, Monday 26 June 2017 (37128)
Shift Transition - Owl

TITLE: 06/26 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    Wind: 4mph Gusts, 3mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:

 

LHO General
thomas.shaffer@LIGO.ORG - posted 00:01, Monday 26 June 2017 (37127)
Ops Eve Shift Summary

TITLE: 06/26 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ed
SHIFT SUMMARY: A weird instability started a little into my shift. I think an initial alignment fixed this, but now I am still having trouble locking. It doesn't seem to be dropping at any particular place, and it has been difficult to get past DRMI. Passing it off to Ed with DRMI locked.
LOG:

H1 General
thomas.shaffer@LIGO.ORG - posted 23:22, Sunday 25 June 2017 (37126)
Lockloss @ 06:20 UTC

Not the same issue as last time, no obvious reasons why at this point.

H1 General
thomas.shaffer@LIGO.ORG - posted 19:08, Sunday 25 June 2017 - last comment - 20:36, Sunday 25 June 2017(37122)
Lockloss @ 02:07

Same as last one, I'll try an initial alignment since DRMI wasn't great ast time.

Comments related to this report
thomas.shaffer@LIGO.ORG - 20:01, Sunday 25 June 2017 (37124)
Link

Doing and initial alignment seemed to help, but it broke as I reached NOMINAL_LOW_NOISE. Time to try again.

thomas.shaffer@LIGO.ORG - 20:36, Sunday 25 June 2017 (37125)
Link

Observing 03:35 UTC

H1 General
thomas.shaffer@LIGO.ORG - posted 17:41, Sunday 25 June 2017 - last comment - 18:50, Sunday 25 June 2017(37119)
Lockloss @ 00:17 UTC

The control signals started ringing up for the past 40min or so. They got to the point where I felt like we were going to lose it any second. CSOFT P and CHARD P seemed to be rung up the most, so in an act of desperation I went to ramp down the gain on those one at a time. It didn't work.

There are no obvious clues to me as to why the control loops started to ring up. I attached the lockloss plot and some trends

Images attached to this report
Comments related to this report
thomas.shaffer@LIGO.ORG - 18:09, Sunday 25 June 2017 (37120)
Link

Back to Observing 01:09 UTC

thomas.shaffer@LIGO.ORG - 18:50, Sunday 25 June 2017 (37121)
Link

The instability continues, but doesn't seem to be getting worse to the point of lock loss. It is hurting our range as we are now down to 56Mpc.

LHO General
thomas.shaffer@LIGO.ORG - posted 16:12, Sunday 25 June 2017 (37118)
Ops Eve Shift Transition

TITLE: 06/25 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 11mph Gusts, 9mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.11 μm/s
QUICK SUMMARY: Almost 12hr lock, Corey had an earthquake that we rode through.

LHO General
corey.gray@LIGO.ORG - posted 15:59, Sunday 25 June 2017 (37115)
DAY Operator Summary

TITLE: 06/25 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc.
INCOMING OPERATOR: TJ
SHIFT SUMMARY:

Nice quiet shift with H1 up the entire shift.
LOG:

 

H1 SEI (SEI)
corey.gray@LIGO.ORG - posted 14:03, Sunday 25 June 2017 - last comment - 19:46, Sunday 25 June 2017(37116)
Earthquake Report: 6.2 near Tonga, H1 Remained Locked (& mid-shift report)

Summary:  H1 Remained Locked, L1 Broke lock, Virgo was already down before EQ

H1 rode through this decent-sized EQ from the South Pacific.  The green ITMY Z EQ BLRMS signal approached 1000nm, but never got there (instructions say to take it to LARGE_EQ, which I assume is LARGE_EQ_NOBRSXY [I'm assuming even when locked?], but we never reached the threshold).

Play By Play Of Signals/Tools/Monitors As EQ Approaches/Passes:

Comments related to this report
edmond.merilh@LIGO.ORG - 15:44, Sunday 25 June 2017 (37117)
Link

The last conversation that I had with Jim left me the understanding that switching to Large EQ anything is done after the lock is broken and is to simply keep the tripping under control. Unless I misunderstood, I don't think switching in-situ is going to help. Am I wrong? anyone?

jim.warner@LIGO.ORG - 19:46, Sunday 25 June 2017 (37123)
Link

Ed's right, the only intent of the large eq state is to keep the tables from tripping when the low frequency ground motion is large. Going to this state outside of some narrow circumstances will probably break the lock. The other eq states might work better, but the transition isn't fast enough and will also probably break the lock.

To remind everyone what the response is during an earthquake: While the IFO is locked, do nothing. AFTER  the IFO goes down, if the earhtquake is big (probably like a mag 7+, but depends on distance) switch to the large eq state. When .03-.1 hz blrms are somewhere below 1 micron, switch back to the windy state. This is just to prevent tables from tripping, saving time and steps in recovery. The hope is that if the tables don't trip, you're less likely to have to do an initial alignment.

If you like resetting watchdogs and running through initial alignment, feel free to ignore these directions.

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