TITLE: 05/19 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 101Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Rode out earthquakes from New Caledonia with SEI_CONF in EARTH_QUAKE mode. One GRB alert. Candidate S190519bj.
LOG:

16:18 UTC Set INJ_TRANS to INJECT_KILL
17:16 UTC Set INJ_TRANS to INJECT_SUCCESS
17:16 UTC Set SEI_CONF back to WINDY
19:30 UTC GRB alert (E333489). Confirmed with LLO.

Successfully rode out earthquakes from New Caledonia with SEI_CONF in EARTH_QUAKE mode. Have set SEI_CONF back to WINDY.

TITLE: 05/19 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 107Mpc
OUTGOING OPERATOR: Niko
CURRENT ENVIRONMENT:
    Wind: 13mph Gusts, 10mph 5min avg
    Primary useism: 0.10 μm/s
    Secondary useism: 0.22 μm/s 
QUICK SUMMARY:

Riding through earthquakes from New Caledonia. Leaving SEI_CONF in EARTH_QUAKE mode.

TITLE: 05/19 Owl Shift 07:00 – 15:00 (00:00-08:00), all times posted in UTC

STATE of H1: Observing

INCOMING OPERATOR: Patrick

SHIFT SUMMARY: Stayed locked for the shift, bringing us to 37 hours locked, 20 hours in Observing. Got a few GRB alerts, and a warning about a 6.3 earthquake in New Caledonia. Leaving the IFO in earthquake state in response to a corresponding sharp spike in seismic activity.

LOG:

07:00 (00:00) Start of shift

07:25 (00:25) GRB (E333376)

07:29 (00:29) GRB (E333377)

13:00 (07:00) GRB (E333396)

14:32 (07:32) Incoming 6.3 earthquake from New Caledonia

15:00 (08:00) End of shift

Ops Shift Transition: 05/19/2019, Owl Shift 07:00 – 15:00 (00:00-08:00) - UTC (PT)

State of H1: Locked

Intent Bit: Observing

Weather: ~10 mph wind, clear sky

Primary 0.03 – 0.1Hz: 0.02 um/s

Secondary 0.1 – 0.3Hz: 0.3 um/s

Outgoing Operator: Jeff

Quick Summary: Locked for 30 hours, Observing for 13 hours. IFO has rung down after a recent large earthquake, microseism up from 16 hours ago.

    Good first half of the shift in Observing mode. 

   01:39 (18:39) Put SEI_CONFG to EARTHQUAKE for a mag 6.8 EQ in New Caledonia. Rode through without losing lock. Will be transiting back to WINDY shortly as the ground motion rings down. 

   The Mid-Columbia Ballet and the associated tours are concluding.     

TITLE: 05/18 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Squeezer took us out of observing (alog 49336). Hit INIT on the SQZ_MANAGER guardian to bring it back. Got verbal alarm notification of candidate S190518bb.
LOG:

16:36 UTC Restarted video4
18:06 - 18:14 UTC Squeezer takes us out of observing
19:24 UTC Verbal alarm notification of S190518bb
19:27 UTC Set INJ_TRANS guardian to INJECT_KILL
20:11 UTC Set INJ_TRANS guardian to INJECT_SUCCESS

No issues to report since squeezer.

18:06 UTC Screenshots attached.

TITLE: 05/18 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 114Mpc
OUTGOING OPERATOR: Niko
CURRENT ENVIRONMENT:
    Wind: 4mph Gusts, 3mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.13 μm/s 
QUICK SUMMARY:

Status of Beckhoff system at end X is still red from wind sensor dropout. No other issues.

TITLE: 05/18 Owl Shift 07:00 – 15:00 (00:00-08:00), all times posted in UTC

STATE of H1: Observing

INCOMING OPERATOR: Patrick

SHIFT SUMMARY: Came in locked at 110 Mpc, had no serious seismic issues, and wind died down over the course of the shift. Ending with 13 hour lock, 10 hours in Observing, and 115.6 Mpc range.

LOG:

07:00 (00:00) Start of shift

Twiddling thumbs, staring at medm screens

15:00 (08:00) End of shift

Wind has gone down, not much seismic activity. Been Observing at 110 Mpc for 7 hours.

Ops Shift Transition: 05/18/2019, Owl Shift 07:00 – 15:00 (00:00-08:00) - UTC (PT)

State of H1: Locked

Intent Bit: Observing

Weather: ~10 mph wind, clear sky

Primary 0.03 – 0.1Hz: 0.02 um/s

Secondary 0.1 – 0.3Hz: 0.1 um/s

Outgoing Operator: Jeff

Quick Summary: Locked for 6 hours, Observing 2.5 hours. Despite continuing SHG issues, range looks good at 110 Mpc.

Sheila, Jeff B

I used the new remote desktop tonight for the first time, it's really great.  I was able to watch the squeezer channels while Jeff adjusted the current on the floor, the latency is low enough that I could see exactly what was going on. Thank you CDS!

Keita and Jeff got in touch because there are some errors with the squeezer.  The SHG power stabilization was railed, which is actually happening a lot.  This is something that we need to make more reliable somehow, but it doesn't really have much of an impact on the sensitivity so it is OK to just keep observing like this.  

The reason that this servo keeps railing is that the squeezer was unimpressed by my efforts to reduce backscatter on Tuesday 49237 and the mode hopping is getting pretty bad.  The attached screenshot shows that we have temporarily fixed this several times over the last few months by adjusting the laser current, but after a few weeks the mode hopping comes back.  Tonight Jeff and I took H1 out of observing for a few minutes, turned off the squeezer by requesting SQUEEZER_READY_IFO from the SQZ_MANAGER guardian, and while I watched the laser diode current and the slow temperature feedback from the FSS (H1:SQZ-LASER_HEAD_CRYSTALFREQUENCY) Jeff adjusted the laser current knob.  As he lowered the current, the temperature control signal became more negative.  To avoid hitting the rail, he made small adjustments to the temperature knob on the laser controller while I watched the control signal come back to zero.  

I think that we probably didn't make a large enough change to the current, we started with the set current at 2.107A, now it is around 1.98 A.  We decided to go back to observing and wait a half hour to see if he green power becomes any more stable; it did not.  We might need to go as low as 1.9 A this way before we see a real improvement. By the time we had waited a half hour, we were back in triple coincidence and decided not to drop out to try to fix this now.  

It might be that the long term solution to this problem is to swap the squeezer laser soon, probably once both Daniel and I are back on site.  In the meantime there are probably 3 options:1)  leave it alone as long as the squeezer keeps locking, 2) step the laser current down to about 1.9A, while trying to step the temperature up to keep the beatnote as Jeff and I did tonight 3) make a full search for a mode hop free region as described in 48537

   The range has been a bit low since relock. Thought it might be due to high winds and series of EQs during the shift. In checking the Squeezer, found Squeezer SHG Conversion Efficiency Low status. Posted screen shots of the various related MEMD screens.