02:35 (18:35) Lockloss, possibly due to a mag 5.6 EQ near Papua New Guinea. Seismic jumped up to just over 1.0Um/s. Will try relocking as soon as things settle down.   

Title:  12/28/2015, Evening Shift 00:00 – 08:00 (16:00 – 00:00) All times in UTC (PT)
	
State of H1: 00:00 (16:00), The IFO has been in Observing mode for the past 5 hours (IFO has been locked for over 40 hours, but there was a break in observing). Environmental conditions are good. The wind is calm (0- 1mph); seismic is flat and microseism is centered around 0.3um/s.      

Outgoing Operator: Cheryl

Monthly test call came in at 12:33PT, 20:33UTC, informing us that the test of the sirens would have them running off and on for an hour.

Ops Day Summary: 16:00-23:59UTC, 08:00-16:00PT

State of H1: locked in Observe, range is 77Mpc

On site: Darkhan (fellow), JeffK, Gerardo, Sudarshan, Thomas Vo, Kiwamu (just arrived), and JeffB (incoming Ops, just arrived)

Shift Details:

• H1 has been locked 40 hours 3 minutes
• one unintentional break in Observe occured from 19:03-1925UTC (see earlier alog for details)
• during the break in Observe, there is about 15 minutes of "unofficial undisturbed" time (see same earlier alog for details)
• PSL diode chiller filled
• CP3 filled manually by Gerardo
• Gerardo on site and driving off and on starting from 23:04:36UTC and ending by 00:00UTC (more details in his alog)
• ETMY saturations, 15 total during my shift
• Gamma Ray Burst at 22:47:43UTC

Maintenance Tasks Tomorrow:

• one LN2 delivery slated for maintenance tomorrow; CP3 at MY
• weekly GraceDB heartbeats at ~9:00am and ~9:05am, for SNs and GWs, respectively
• PSL watchdog reset

After notifying the operator I drove past CS @ 23:04 and arrived at Y-Mid station @ 23:09.
Started filling CP3 @ 23:15, opened the exhaust check valve bypass valve, then opened LLCV bypass valve 1/2 turn, closed the flow 105 seconds later.  3 minutes later I closed the exhaust check valve bypass valve.

Started driving back from Y-Mid @ 23:28, arrived at the CS @ 23:32.
 

State of H1: locked in Observe, range is 76Mpc

The full report is located here

• The 24th was a very difficult day locking due to problems with ALS, only about 7.6% observing.
• The 25th had a better percentage of duty cycle, however, it's a little misleading because there was a lot of glitching between 06:00 and 16:00.  This could have been due to RF45 but Fred's ALOG suggests it could be something a bit trickier.  For some reason, HVETO did not run this day but it would be very interesting to know which glitches it caught, the range and Omicron look terrible during this time.
• The 26th had very very clean data, the shift went smoothly and we got about 85% observing.
• The 27th was also very clean data and we got  95% observing!

• LVEA temperature crossed 70 degrees F.
• Temperature appears to be leveling off at 70.1F.
• 10 day trend shows overall increase.
• LVEA temperature crossed 70F on 12/25, and returned to a temperature below the alarm level in about 2 hours.

I added 250ml to the PSL Diode chiller today, after PeterK called and pointed out that it was showing a low water level alarm.

Attached is a 42 day plot of the PSL diaode chiller low water level alarm.

I am not able to reconcile the alog entries for filling this chiller with this plot.

I wrongly added the amount I put in the Diode chiller on the Crystal chiller log (paper log in chiller room), so have crossed my entry off that list.

What happened:

An accidental button push took H1 out of Observe at 19:03:46UTC, and H1 was returned to Observe at 19:25:31UTC after the PSL diode chiller was filled.

Timeline Details:

• The filter, ETMY_L3_DRIVEALIGN_L2L FM3, was briefly turned off and back on, and the glitch was visible in H1 DARM.
• The filter was in a non-standard configuration approximately between 1145364642 and 1135364645 GPS time (times taken from dataview plot).
• During that time I was talking to Peter King - he called to let me know that the PSL Diode Chilller was in alarm, low water level.
• Trend of 7 day history of this alarm is attached, and shows that although the chiller was filled on the 24th, it quickly went back into alarm for low water level.
• History is that when filled, the amount added has been 125ml.
• I added 250ml today.
• This alarm should be watched closely in the next 24 hours to insure it doesn't go back into low water level alarm.
• I finished filling the chiller by 19:24:00UTC.
• I returned to the Control Room and returned H1 to Observe at 19:25:13UTC.

Given these activites, after ETMY L2L filter back was restored and resulting glitch in DARM passed, the IFO was not disturbed again until I filled the chiller between 19:19:00UTC and 19:24:00UTC.

Timeline Summary:

• 19:03:46 H1 out of Observe
• approx. 19:03:50, ETMY filter bank was back in standard config.
• H1 undisturbed for approx. 15 minutes
• 19:19:31UTC I take a "before" snapshot of the chiller warning
• I fill the chiller
• 19:23:52UTC I take the "after" snapshot of the chilller and then exit the chiller room
• 19:25:13UTC H1 is returned to Observe

IFO Guardian Log Details:

2015-12-27T08:01:00.52831 IFO [ALL_NODES_OK.enter]
2015-12-28T19:03:46.23209 IFO [ALL_NODES_OK.run] USERMSG: node NOTIFICATION: DIAG_SDF
2015-12-28T19:03:46.35568 IFO state returned jump target: DROP_OK
2015-12-28T19:03:46.35588 IFO [ALL_NODES_OK.exit]
2015-12-28T19:03:46.41705 IFO JUMP: ALL_NODES_OK->DROP_OK
2015-12-28T19:03:46.41724 IFO calculating path: DROP_OK->ALL_NODES_OK
2015-12-28T19:03:46.41748 IFO new target: WAITING_FOR_NODES_OK
2015-12-28T19:03:46.41790 IFO executing state: DROP_OK (5)
2015-12-28T19:03:46.41802 IFO [DROP_OK.enter]
2015-12-28T19:03:46.60496 IFO EDGE: DROP_OK->WAITING_FOR_NODES_OK
2015-12-28T19:03:46.60534 IFO calculating path: WAITING_FOR_NODES_OK->ALL_NODES_OK
2015-12-28T19:03:46.60572 IFO new target: ALL_NODES_OK
2015-12-28T19:03:46.60645 IFO executing state: WAITING_FOR_NODES_OK (20)
2015-12-28T19:03:46.60664 IFO [WAITING_FOR_NODES_OK.enter]
2015-12-28T19:03:47.92328 IFO EDGE: WAITING_FOR_NODES_OK->ALL_NODES_OK
2015-12-28T19:03:47.92369 IFO calculating path: ALL_NODES_OK->ALL_NODES_OK
2015-12-28T19:03:47.92443 IFO executing state: ALL_NODES_OK (100)
2015-12-28T19:03:47.92461 IFO [ALL_NODES_OK.enter]
 

Plots attached:

1. ETMY filter (approx. 3 seconds)
2. PSL Diode Chiller Low Alarm (30 minutes)
3. Both channels plotted together, showing the time in between where H1 is undistrubed, but not in Observe (23 minutes total, approx. 15 minutes of "unofficial undisturbed" time)

A glitch at 19:03:46 UTC (Dec 28, 2015) was caused by me accidentally pressing a filter switch in aSUS-ETMY front-end model.

The filter name that was touched is H1:SUS-ETMY_L3_DRIVEALIGN_L2L, it was turned off and back on within about a second, because I double-clicked on a switch button.

O1 days 100,101

model restarts logged for Sun 27/Dec/2015
2015_12_27 15:32 h1nds1

daqd process on h1nds1 unexpectedly stopped, had to be manually restarted.

model restarts logged for Sat 26/Dec/2015 No restarts reported

Ops Day Shift: 16:00-23:59UTC, 08:00-16:00PT

State of H1: locked in Observe for 33 hours, range is 81.5Mpc

On Site: Darkhan and DickG

Commissioning Meeting at 8:30:

• MikeL called in
• MikeL expressed a preference to run through Maintenance tomorrow
• only known commissioning/calibratoin activity for tomorrow is EX Pcal - Darkhan said it is ok to delay until next week

Shift Details as of 17:20UTC

• four ETMY saturations, at 16:46:03, 16:48:46, 17:10:19, and 17:18:11UTC
• range dropped to approx. 5Mpc for the saturations at 16:48 and 17:10UTC
• no wind - 0mph across the site
• useism at the Corner Station in Z direction is at 0.5um/s and is increasing
• useism at EY and EX, at Y direction and X direction respectively, is between 0.2 and 0.3um/s, and looks pretty flat for the past 8 hours

ISI Blend Filters - snapshot of current configuration attached

TITLE: Dec 28 OWL Shift 08:00-16:00UTC (00:00-08:00 PDT), all times posted in UTC

STATE Of H1: Observing @ 82Mpc

SUPPORT: N/A

INCOMING OPERATOR: Cheryl

SHIFT SUMMARY: Great night! IFO locked for 32 hours at ≈81Mpc. One small earthquake cause things to wiggle a bit up to .1µm/s. µSei is still hovering ≤ 90th percentile. Winds are calm. Mike called to check in. It’s snowing. Handing off to Cheryl.

Mid-SHIFT SUMMARY: IFO locked for 28 hours at 81Mpc (82.4Mpc max). Environmental conditions are the same as shift transition.  One small glitch at ≈ 11:45UTC that caused a drop in range of ≈ 10Mpc. No saturations. LLO still down.

TITLE: Dec 28 OWL Shift 08:00-16:00UTC (00:00-08:00 PDT), all times posted in UTC

STATE Of H1: Observing

OUTGOING OPERATOR: Jim

QUICK SUMMARY: IFO has been locked in the 80Mpc range for ≈ 24.5 hours. Seismic conditions in the EQ bands are back to nominal after some small activity and µSei is ≤ 90th percentile. Wind is ≤5mph. ISI blends are all 45mHz in the corner and all 90mHz at the ends except for ETMY on axis. Livingston is down due to high µSeism.

2150 hrs. local 

Overfilled CP3 manually -> I prefer the new procedure of opening the LLCV bypass valve 1/2 turn ccw then partially opening the exhaust check valve bypass valve to minimize back pressure.  Once LN2 is observed flowing out of the exhaust (~2 minutes), closing the LLCV bypass valve then closing the exhaust check valve bypass valve - in that order.  This should reduce the maximum exhaust pressure.

NOTE:  I did not open the instrument air pressure regulator bowl drain to check for dryness tonight, i.e. change the air pressure at the CDS controlled solenoid valve but nevertheless, the CDS MEDM "START/enable STOP/disable" indicator went from green to red again and I had to re-enabled it - why?  Manually filling the 80K pump using the above method only changes the 80K pump exhaust pressure and should have no effect on the instrument air. 

Gerardo is scheduled to do the next CP3 overfill exercise sometime before 5:00 p.m. hrs. local tomorrow, Monday.

Summary

I updated the quad matlab model parameter file with SolidWorks estimates of the test mass and PUM rotational inertias. Previously these values were output from a fitting algorithm using the measured resonance frequencies, see log 10089.

The updated parameter files are quadopt_fiber.m (the generic quad file) and h1etmy.m. quadopt_fiber.m is the general quad file, h1etmy.m is specific to H1ETMY. They are currently identical since we have the most measurements from H1ETMY. Both live in this directory

.../SusSVN/sus/trunk/QUAD/Common/MatlabTools/QuadModel_Production

Discussion

This update was done because there has been some discussion on the accuracy of the test mass inertias in the model. The solidworks mass values for the test mass and PUM agree with the measured weights to 0.2% and 0.07% respectively. This doesn't tell us the error for the inertias, but since they are small, it is a good sign. Previosuly, the inertias were chosen by the aforementioned fitting algorithm. These had differed from solidworks by 2% in roll (I3x) and yaw (I3z), and 7% in pitch (I3y). Further, Shivaraj pointed out that the pitch inertia from the fit was smaller than the yaw, which can't be true due to the flats on the optic. The assumption is that the solidworks estimates are more accurate.

With the updated inertias on the PUM and test mass, I made a new fit of the model, floating all the d's of each stage, the inertias of the top mass and UIM, the spring stiffnesses, and the vertical stiffness of the fibers. I wouldn’t put too much faith into the accuracy of these values. The best we can do is try to make a model that matches the information we have. If we ever get new or better information (such as good L-P coupling data) we can update the model with that then.

The plots in the first pdf show a comparison of the measured H1ETMY transfer functions to the previous model fit and the new one. They all match pretty well. The new fit appears to match the top mass L to P measurement better.

The plots in the second attached pdf show the ratios of the new fit to the old fit for the damped L to L TFs from all stages to the test mass. The damping loops were imported from those currently running at LHO. These ratios all appear to be within 10% of unity.

For reference, this is a summary of the history of model revisions on the svn:

* generate_QUAD_Model_Production.m

rev 7359: now reads foton files for main chain and reaction damping

rev 7436: Changed hard coded DAMP gains to get the correct values for LHO ETMX specifically.

rev 7508: Restored damping filter choice for P to level 2.1 filters as opposed to Keita's modification. Cleaned up error checking code on foton filter files, and allowed handling of filter archive files and files with the full path.

rev 7639: renaming lho etmy parameter file

rev 7642: Adding custom parameter file for each quad. Each one is a copy of h1etmy at this point, since that one has the most available data.

rev 7646: added ability to read live filters from sites, and ability to load custom parameter files for each suspension

rev 7652: updated to allow damping filters from sites from a specific gps time (in addition to the live reading option)

planned future revision - seismic noise will progate through the damping filters as in real life. i.e the OSEMs are relative sensors and measure the displacement between the cage and the suspension.

* ssmake4pv2eMB5f_fiber.m

no recent (at least 4 years) functional changes have been made to this file.

* quadopt_fiber.m

- rev 2731: name of file changed to quadopt_fiber.m, removing the date to avoid confusion with Mark Barton's Mathametica files.

- rev 6374: updated based on H1ETM fit in 10089.

- rev 7392: updated pend.ln to provide as-built CM heights according to T1500046

- rev 7912: the update described in this log, where the solidworks values for the inertias of the test mass and pum were put into the model, and the model was then refit.  Same as h1etmy.m.

* h1etmy.m

- rev 7640: created the H1ETMY parameter file based on the fit discussed in 10089.

- rev 7911: the update described in this log, where the solidworks values for the inertias of the test mass and pum were put into the model, and the model was then refit. Same as quadopt_fiber.m.