Seems as though the RF45 noise has left us around an hour and a half ago. We have had a few instances where we will get a few EMTY saturations in succession, but nothing that affected the DMT monitor at least.

Still locked and Observing at 77Mpc.

Laser Status:
SysStat is good
Front End power is 30.75W (should be around 30 W)
Frontend Watch is GREEN
HPO Watch is RED

PMC:
It has been locked 27.0 days, 8.0 hr 21.0 minutes (should be days/weeks)
Reflected power is 1.644Watts and PowerSum = 24.72Watts.

FSS:
It has been locked for 0.0 days 18.0 h and 48.0 min (should be days/weeks)
TPD[V] = 1.505V (min 0.9V)

ISS:
The diffracted power is around 8.035% (should be 5-9%)
Last saturation event was 0.0 days 18.0 hours and 20.0 minutes ago (should be days/weeks)

 

I received an alarm in the control room here at 00:50 UTC (16:50 PST) for the MY Cryo Pump 3. The fill percent jmped up to 120% and has since been very slowly trending down (currently at 117.6% at 17:42). Kyle, John, Bubba, and Gerardo have been notified and are monitoring the situation.

Trends below of CP3 and CP4 for the HVE-MY:CP{}_LIC and HVE-MY:CP{}_LT channel for the a few hours before the excursion.

• TITLE: 12/21 Eve Shift: 00:00-08:00UTC (16:00-00:00 PDT), all times posted in UTC"

• STATE Of H1: Observing, locked for 16 hrs

• OUTGOING OPERATOR: Jim W

• QUICK SUMMARY: RF45 is back!!! the past 2 hours os so the IFO has been plagued by the RF45 noise. There are people in the control room investigating but in the mean time I guess the plan is to stay in Observing and just make sure that the data is flagged.

• Wind <20mph, useism 0.8um/s, PSL 21.9W, CW inj running.

TITLE:    Dec 21 Day Shift 08:00-16:00UTC

STATE Of H1: Observing, RF45 is acting up

SUPPORT: Typical control room crowd

SHIFT SUMMARY: I took over for Cheryl at 21:30, thing were quiet until RF45 started acting up at 23:30, still in observe, but data is obviously bad

ACTIVITY LOG:

21:20 JeffK Running pcal to darm tf, llo calls to say they are at dc readout, done 22:30

22:00 Bubba to Mid-Y, back 24:00

45 MHz stabilization started gitching circa 23:15:00 Z.

This was accompanied by a drop of a few percent in AS90.

Nothing is visible in the spare amplitude demod on the ISC rack (23567). Noise appears stationary with an rms of a few millivolts, meaning the RAN of this glitch at the ISC rack (not including the EOM driver chain) is less than a few parts in 10⁵.

J. Kissel

Another collection of our bi-monthly(-ish) assessment of the calibration and DARMOLGTF. Details will be processed later including analysis of time-dependence. The front-end, CAL-CS, DELTAL_EXTERNAL calibration (and therefore the low-latency GDS pipeline output) is still within the desired precision. I attach screenshots of the measurements for posterity. Note, this time, I've updated the reference to be the most recent sweep, taken Dec 01 2015, (see LHO aLOG 23883, also yet to be processed.)

DARM OLGTF Template:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O1/H1/Measurements/DARMOLGTFs/2015-12-21_H1_DARM_OLGTF_7to1200Hz.xml

Corresponding Exports: 
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O1/H1/Measurements/DARMOLGTFs/
2015-12-21_H1_DARM_OLGTF_7to1200Hz_A_ETMYL3LOCKIN2_B_ETMYL3LOCKEXC_coh.txt
2015-12-21_H1_DARM_OLGTF_7to1200Hz_A_ETMYL3LOCKIN2_B_ETMYL3LOCKEXC_tf.txt
2015-12-21_H1_DARM_OLGTF_7to1200Hz_A_ETMYL3LOCKIN2_B_ETMYL3LOCKIN1_coh.txt
2015-12-21_H1_DARM_OLGTF_7to1200Hz_A_ETMYL3LOCKIN2_B_ETMYL3LOCKIN1_tf.txt

PCAL2DARM TFs:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O1/H1/Measurements/PCAL/2015-12-21_PCALY2DARMTF_7to1200Hz.xml

Coresponding Exports:
2015-12-21_PCALY2DARMTF_7to1200Hz_A_PCALRX_B_DARMIN1_coh.txt
2015-12-21_PCALY2DARMTF_7to1200Hz_A_PCALRX_B_DARMIN1_tf.txt

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

State of H1: in Oberve for almost 12 hours, range is 74.3Mpc

Details: some site activites, useism is around 0.7um.s, winds 5-15mph

work today:

- follow up on glitch and range drop around 14:00UTC

- CDS - Richard tomorrow/today, audio signal

- Bubba at MY and MX

work tomorrow Maintenance:

- Hugh rezero TS2's at end stations

- Richard, audio signal

- Bubba, forklift work, clean room curtains at EY, switch fans at EY, pick up welder at EX

- Jason, BS and SR3 oplevs

- Sudarshan/Darkhan, possible pcal calibration at Y end

- Jeff, forklift PSL chiller

Attached are 7 day pitch, yaw, and sum trends of all active H1 optical levers.

State if H1: in Observe

Plot 1 shows the RF AM stabilization out-of-loop sensor and the control signal. Over the past 30 days there were 5 clearly visible glitches in the control signal. These are reflected in the out-of-loop sensor. However, there are two non-stationary episodes in the sensor signal which have only a negligible counterpart in the control signal.

Plot 2 shows the same traces over the past 120 days. Overall, the glitches seem to have reduced in size and frequency for no apparent reason.

Activity Log: All Times in UTC (PT)

08:00 (00:00) Take over from Ed
11:15 (03:15) High heat alarm for CS Zone 4 duct temperature, (101.16F). Will monitor.
13:08 (05:08) Four ETM-Y saturations (18:08:33, 37, 40, 44), with a marked drop in range to ~ 63Mpc
16:00 (08:00) Turn over to Cheryl    


End of Shift Summary:

Title: 12/21/2015, Owl Shift 08:00 – 16:00 (00:00 – 08:00) All times in UTC (PT)

Support:  None
 
Incoming Operator: Cheryl

Shift Detail Summary: Locked in Observing mode for past 8 hours. Power at 21.8w, range 79Mpc. Wind is light to gentle breeze (4-12mph). Seismic is improving with a downward trend for the past 6 hours. Microseism is also decreasing, but at a much slower rate than seismic. 

Other than 4 ETM-Y saturations (within 11 seconds), which took the range down to a low of 63Mpc, there were no problems or issues during the shift.