Noticed on our Seismic FOMs that some of the 1-3Hz seismic BLRMS trends took a step up at midnight last night (~8:03UTC today). I went ahead and looked at all the bands & axis of the EX/EY/LVEA seismometers and only found this jump on (3) trends for 1-3Hz: LVEA_X, LVEA_Z, & EY_Y.
Attached are trends of 1-3Hz for the last 24hrs.
(Ed, Kiwamu),
A workaroud (temporary, manual and painful):
What I tried (none of them worked):
I spent a couple of hours investigating the issue, but I could not identify or fix the issue. And I was never able to lock the laser the X arm. The below is a list of what I tried.
Per Operator Shift Checksheet activity for Thursday Task, I topped off the chiller by adding 175mL of water (this was before we took H1 to Observing).
TITLE: 12/31 DAY Shift: 16:00-00:00UTC (08:00-04:00PDT), all times posted in UTC
STATE of H1: Down & alignment/locking investigation by Kiwamu
Outgoing Operator: Ed
Quick Summary:
Kiwamu & Ed ran into issues with the INPUT ALIGN section of the Initial Alignment. Kiwamu mentioned it could be related to the AS_Air photodiode. (Even though we can't get to INPUT ALIGN, the AS Air spot looks nice [no higher order modes or jumps when flashing AND the IR Xarm flashes have been up to 1.0---so, it looks good...but no INPUT ALIGN). Current plan is to skip the INPUT ALIGN section of Alignment and try locking.
Additional Notes:
1) And if you are familiar with Initial Alignment issues of late, you will remember that lately we have been skipping the Dark Michelson portion of Initial Alignment....and this state also uses AS_Air. So this sounds suspicious....
BUT,
2) SRC state of Initial Alignment also uses the AS_Air PD, and we were able to get SRC with no problem. Suspicious indeed!
Currently waiting for DRMI to lock.
Back To Observing at 17:10UTC (9:10amPST)
Only SDF Diff was: Dark offset for AS_AIR was Accepted (from -75.0 to -80.0).
Notes on Guardian steps:
I have incremented the XEND heater HC3 from 13.0 to 13.5 ma. The VEA temperature had fallen a little overnight.
TITLE: Dec 30 OWL Shift 08:00-16:00UTC (00:00-08:00 PDT), all times posted in UTC
STATE Of H1: Uknown
SUPPORT: Kiwamu
INCOMING OPERATOR: Corey
SHIFT SUMMARY: After the quake recovery, which didn’t take long. The IFO was in need of some initial alignment. I never got past INPUT_ALIGN. THe X-Arm would not lock in IR. After trying many things and a long telephone call with Kiwamu, he decided to come in. The spot looked a little pitchy in the PR2 and IM4 dept. Also SR2 has moved 17µrad in Pitch causing the spot to be higher than usual on the AS_AIR camera. YAW on that same optic was restored. Kiwamu is still working on the problem.
11:27UTC
5.7
36.5 km
11:20UTC IFO locked at 68 Mpc. In other news....5.7 in Nicaraugua is rolling us which is why the range is down. 2.63µm R-Wave expected to roll through here right about now. Fingers crossed. Preparing the lockloss log. :/
TITLE: Dec 31 OWL Shift 08:00-16:00UTC (00:00-08:00 PDT), all times posted in UTC
STATE Of H1: Observing
OUTGOING OPERATOR: Jeff
QUICK SUMMARY: IFO and environment look to be all in very good shape.
Activity Log: All Times in UTC (PT) 00:00 (16:00) Take over from Corey 08:00 (00:00) Turn over to Ed End of Shift Summary: Title: 12/30/2015, Evening Shift 00:00 – 08:00 (16:00 – 00:00) All times in UTC (PT) Support: Vinnie, Incoming Operator: Ed Shift Detail Summary: Full shift of Observing mode with no apparent problems. We have been in Observing mode for the past 18 plus hours. There were a couple of ETM-Y saturations. The environmental and seismic conditions were quiet all shift. The timing error on H1OAF is still there but it has not gotten any worse.
First half of the shift has been undisturbed Observing, with the IFO locked for the past 14.75 hours. Power and range remain at 21.8W and ~80Mpc respectively. The wind is up a little (calm to a gentle breeze (0-7mph)) but of no real concern. Forecast for the next 36 hours does not show much change over these conditions. The seismic and microseism slopes continue flat and within upper/lower limits. The timing error on H1OAF has not exceeded the 63uS level. Will continue to monitor; per Dave B. will not address it unless we go out of Observing or it gets worse.
Transition Summary: Title: 12/30/2015, Evening Shift 00:00 – 08:00 (16:00 – 00:00) All times in UTC (PT) State of H1: 00:00 (16:00), IFO in Observing mode for almost 11 hours. Power and range are good. Environmental conditions are good. The wind is up to a light breeze (2- 7mph). Seismic and microseism have been holding steady for the past 24 hours. Outgoing Operator: Corey
TITLE: 12/30 DAY Shift: 16:00-00:00UTC (08:00-04:00PDT), all times posted in UTC
STATE of H1: Locked for last 10+hrs at 80Mpc
Incoming Operator: Jeff B.
Support: Darkhan on-site fellow, Sheila (Locking Commissioner)
Quick Summary:
Fairly quiet shift for H1. Environment is somewhat quiet with LVEA useism at 0.4um/s & winds under 10mph.
Thomas noticed the EX HEPI Pressure flashed a few times on OPS_Overview (but trends didn't show much).
EX (& MX) Camera is noisy (think this is a known issue).
Shift Activities:
After notifying the operator I drove past CS @ 23:06 and arrived at Y-Mid station @ 23:11.
Started filling CP3 @ 23:14, opened the exhaust check valve bypass valve, then opened LLCV bypass valve 1/2 turn, closed the flow 90 seconds later. 6 minutes later I closed the exhaust check valve bypass valve.
Started driving back from Y-Mid @ 23:21, arrived at the CS @ 23:27.
Have received quite a few Injection Verbal Alarms over the last few minutes this morning for CW & TRANS (see attached snapshot). Do operators need to do anything about this? I talked with Tom E (L1 Operator) & they did not receive any alarms regarding these injections.
I brought up the CAL_INJ_CONTROL medm and looked at the Continuous Signal section of this window and have not seen anything change (and trended channels for CW and also don't see anything out of the ordinary).
We've been cleaning up the scripts used to present the various calibration measurements against the model and each other. A longer description of script locations and cleanup is LLO alog 23558. This is basically the same as LHO alog 21280, except comparing against the O1 model (H1DARMparams_1124827626.m) and trying to use more generic scripts for both sites. The attached pdfs are results, and can also be found in the aligo calibration svn under: /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O1/H1/Results/ The first 3 all measurement types (Free swinging Michelson, ALS DIFF, PCAL) from 3 different days plotted against each other and the O1 model. The second set of 3 are just the PCAL measurements against the model.
The all-method comparison plots attached here have been renamed to /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O1/H1/Results/ 2015-12-11_H1SUSETMY_ActuationCoeffComp_EYL1_AllMethods.pdf 2015-12-11_H1SUSETMY_ActuationCoeffComp_EYL2_AllMethods.pdf 2015-12-11_H1SUSETMY_ActuationCoeffComp_EYL3_AllMethods.pdf in order to distinguish them from the L1 results, and committed to the repo. The PCAL-only results have been moved into the PCAL subdirectory and similarly renamed, /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O1/H1/Results/PCAL/ 2015-12-11_H1SUSETMY_ActuationCoeffComp_PCAL_EYL1_Residuals.pdf 2015-12-11_H1SUSETMY_ActuationCoeffComp_PCAL_EYL2_Residuals.pdf 2015-12-11_H1SUSETMY_ActuationCoeffComp_PCAL_EYL3_Residuals.pdf
Scratch that....looks like video0 was just dying (StripTools was having data drops....was tricking me into suspecting an infamous "EPICS Freeze"). Rebooting the video0.
Screenshot of the ASC StripTool data drops are attached.