Displaying reports 51721-51740 of 83224.Go to page Start 2583 2584 2585 2586 2587 2588 2589 2590 2591 End
Reports until 08:06, Friday 09 December 2016
H1 DCS (DCS)
gregory.mendell@LIGO.ORG - posted 08:06, Friday 09 December 2016 (32387)
LHO Summary Pages

The load on the DCS detchar box became very high again, preventing the generation of the H1 Det Char Summary Pages. See alog: 32380. I've rebooted the detchar box and sent out emails. The summary pages should begin to catch up again, though this will take a little while.


 

H1 ISC
jim.warner@LIGO.ORG - posted 04:35, Friday 09 December 2016 - last comment - 07:10, Friday 09 December 2016(32382)
PI modes being difficult tonight

Getting to NLN tonight hasn't been a problem so far, but there seem to be a forest of features at 18khz that are upset, and I don't see any filters to handle them. Attached spectra are from the current lock stretch (blue) and the 2 hour lock from 23 hours ago. The features around 18040 hz have been the most problematic, maybe the current bandpasses are good for some of the peaks in that region, but not others? The peak at 18038.5 has been the worst, none of the  filters seem to do any good. So far I've had the best luck using a gain of 1000 on Mode 27, but .....

And before I could hit post 18038.5 rang up and broke the lock.

Images attached to this report
Comments related to this report
jim.warner@LIGO.ORG - 06:05, Friday 09 December 2016 (32383)

Just got done talking to Terra and Keita. With Keita's approval (because it seems to be required to get the IFO running stably), Terra walked me through making a new bandpass filter for this mode:

cheby2("BandPass",4,40,237,240)butter("BandPass",2,237,240)notch(238.5,20,30)gain(31.6228)

This is installed as 18038p5Hz in FM5 on Mode 27 (Terra suspects this mode is also on ETMY). Turning it on created SDF diffs that I've accepted, and I hit the intent bit 20 seconds before 6:00 local.

terra.hardwick@LIGO.ORG - 07:10, Friday 09 December 2016 (32385)

Jim is awesome and mode seems to be holding stable.

This one was a bit confusing because we have two ETMY modes close to one another, one at 18038ish Hz and one at 18042ish, Hz as seen in Jim's spectum. This is probably the source of TJs problems last night (sorry TJ), though when I checked earlier today the peak I trended from his shift was within the BP so I didn't suspect that to be the problem. Jim scooted over the BP and PLL set frequency to be over the 18038 Hz mode. Next day I'm in, I will create a new mode so that the two can be differentiated. Note though that the 18042 Hz mode did not go unstable just now even though we weren't damping it. I'll look into the last several locks and see which seems to be the regularly problematic one. We also weren't driving quite hard enough; Jim increased the damping gain which worked much better.

For now: If Mode27 seems unresponsive, open PI DTT and check if the growing peak is at 18038 or 18042 Hz. Then check the following:

  • Open Mode27 in the PI medm screen.
  • Open the BandPass filter bank
  • Change the mode27 Bandpass filter if necessary (filters for both options now exist) to cover the correct peak frequency 
  • Open the PLL screen for that mode
  • Set the PLL 'set frequency' to 238 (if the peak is at 18038) or 242 (if the peak is at 18042) 
H1 General
travis.sadecki@LIGO.ORG - posted 00:03, Friday 09 December 2016 (32381)
OPS Eve Shift Summary

TITLE: 12/09 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Jim
SHIFT SUMMARY:  A bit of an extended recovery from the EQs led to a late shift lock.  Lost lock just before the shift ended due to PI modes ringing up while I was using the facilities.
LOG:

See previous logs for most of the story.

7:57 Lock loss.

 

H1 DetChar
corey.gray@LIGO.ORG - posted 23:54, Thursday 08 December 2016 (32380)
H1 DetChar Summary Pages Went Down at 2:10UTC (6:10pmPST)

I sent an email to detchar@sympa.ligo.org this time (vs. detchar@ligo.org).

H1 General
travis.sadecki@LIGO.ORG - posted 23:31, Thursday 08 December 2016 (32379)
Observing at 7:29 UTC

After a bit of a battle with bounce/roll modes, we have made it back to NLN and Observing.

H1 INJ (CAL, INJ)
richard.savage@LIGO.ORG - posted 22:49, Thursday 08 December 2016 - last comment - 23:30, Thursday 08 December 2016(32376)
HW injection schedule file and Inspiral directory updated, Xend Pcal line stopped in anticipation of HW injections

EvanG, RickS

The HWinj schedule file on h1hwinj1 was updated as well as the Inspiral directory.

The Schedule file was loaded in the Guardian. (by Travis in the control room).

The HF Pcal line at Xend was stopped at 6:41 UTC (by Travis in the control room).

Six CBC injections are schedule to go in tomorrow morning, starting at 6 AM PST and separated by 70 minutes.

We will want to restart the Pcal line at Xend when the injections are finished, around noon tomorrow (Friday).

Comments related to this report
travis.sadecki@LIGO.ORG - 22:59, Thursday 08 December 2016 (32377)

Screenshot of PCal X line prior to being turned off.

Images attached to this comment
travis.sadecki@LIGO.ORG - 23:30, Thursday 08 December 2016 (32378)

I also had to accept the SDF diffs for turning this line off in order to go to Observing.  See screenshot.

Images attached to this comment
H1 AOS
travis.sadecki@LIGO.ORG - posted 21:25, Thursday 08 December 2016 (32375)
Back to locking

I ran through IA twice because by the time I finished the first round, the arms had drifted off enough that ALS wouldn't lock.  The second time seems to have gone better as we are now past DRMI.

H1 General
travis.sadecki@LIGO.ORG - posted 19:55, Thursday 08 December 2016 (32373)
Ops Eve Mid-shift Summary

The earth has calmed down enough to start relocking finally.  I am struggling through IA since everything was way out of whack following the EQs.

H1 General
jeffrey.bartlett@LIGO.ORG - posted 16:04, Thursday 08 December 2016 - last comment - 16:36, Thursday 08 December 2016(32371)
Ops Day Shift Summary
Ops Shift Log:12/08/2016, Day Shift 16:00 – 00:00 (08:00 - 16:00) Time -  UTC (PT)
State of H1: IFO is DOWN due to EQs.
Intent Bit: Environment
Support: N/A
Incoming Operator: Travis
Shift Summary: The IFO has been down all shift down to strong and continuous earthquake activity throughout the Pacific. 
 
Activity Log:Time - UTC (PT)
16:00 (08:00) Take over from TJ
17:09 (09:09) Karen – Going to Mid-Y for cleaning
17:18 (09:18) Christina – Going to Mid-X for cleaning
17:50 (09:50) Chris – Moving stuff from OSB multipurpose room to the LSB
18:00 (10:00) Put IFO into DOWN due to Mag8.0 EQ near the Solomon
18:11 (10:11) Karen – finished at Mid-Y coming back to the corner
18:20 (10:20) Christina – Finished at Mid-X coming back to the corner
18:21 (10:21) Kyle – Going to Mid-Y
18:40 (10:40) Kyle – Back from Mid-Y
19:32 (11:32) Richard – Going into LVEA to get temperature monitor labels
19:45 (11:45) Richard – Out of the LVEA
00:00 (16:00) Turn over to Travis
Comments related to this report
jenne.driggers@LIGO.ORG - 16:36, Thursday 08 December 2016 (32372)

Yeah, it's been one of *those* days...

Images attached to this comment
H1 DetChar (DetChar)
beverly.berger@LIGO.ORG - posted 14:57, Thursday 08 December 2016 (32370)
DQ Shift: Monday 5 Dec 00:00 UTC - Wednesday 7 Dec 23:59 UTC

Beverly, Terra, Young-Kim

 

Full results from the DQ shift may be found here.

 

H1 AOS
jeffrey.bartlett@LIGO.ORG - posted 14:56, Thursday 08 December 2016 - last comment - 14:29, Friday 09 December 2016(32368)
CPS Sensor Spectra (FAMIS #6875)
   Posted are the plots for the CPS Sensor Spectra. 
Images attached to this report
Comments related to this report
richard.mittleman@LIGO.ORG - 06:49, Friday 09 December 2016 (32384)

HAM 2 needs a second look

jeffrey.bartlett@LIGO.ORG - 14:29, Friday 09 December 2016 (32400)

Reran the HAM2 HAM3 CPS Sensor Spectra. New plot is posted below. Between 20 ans 60Hz, HAM2 looks a bit better. 

Images attached to this comment
LHO VE (DetChar)
kyle.ryan@LIGO.ORG - posted 14:15, Thursday 08 December 2016 - last comment - 09:50, Friday 09 December 2016(32367)
Need DetChar to scrutinize data

We have a diagnostic setup at BSC8 that we need to run for several consecutive days.  This setup utilizes rotating shaft vacuum pumps that have the potential of effecting the IFO data.  Prior to the start of O2, we had Robert S. monitor the IFO signal(s) while it was locked and in "Low Noise" both with the pumps on and also off, i.e. we did "on/off" tests (see alog entry 31802).  Additionally, and on more than one occasion, we had ran these for several consecutive days during which the IFO experienced long lock stretches at good sensitivity.  As such, we were hoping that someone could examine the pertinent IFO data during the following two time segments to look for any evidence of these pumps running.  In both cases, the pumps in question were running continuously:  


November 24th, 0230 UTC to November 29th, 1800 UTC and

December 5th, 1900 UTC to December 7th, 0035 UTC.  

Comments related to this report
keith.riles@LIGO.ORG - 20:48, Thursday 08 December 2016 (32374)DetChar
Attached is a zipped tar file of spectral comparisons for the two pump-on periods cited
and for an intervening pump-off period. Since I don't know what the pump frequency
is supposed to be, I'm not sure where to focus attention, but I'm not seeing gross differences
other than higher 60-Hz harmonics in both pump-on periods (is that expected from
the pumps?), along with the overall greater excitation / upconversion of violin modes and
the presence of  "silent" calibration lines at 22.3 and 30.1 Hz in the first pump-on period. 

Here are the FScanned data intervals used:

pumpon-1 -- 23.5 hours of SFTs collected between Nov24th, 0230 UTC and Nov 29th, 1800 UTC
pumpon-2 -- 11.5 hours between Dec 5th, 1900 UTC and Dec 7th, 0035 UTC
pumpoff -- 78 hours between Nov 30, 14:00 UTC and Dec 5th, 14:00 UTC

If there are particular frequencies where I should be expecting disturbances,
let me know and I'll do some zooming. 
Non-image files attached to this comment
keith.riles@LIGO.ORG - 09:50, Friday 09 December 2016 (32390)
Kyle informed me offline that the pumps run at 1720 RPM (28.667 Hz) 
with small turbos running at 90,000 RPM (1500 Hz). Attached are zooms
of bands around the first four harmonics 28.667 Hz (band sizes increase
linearly with harmonic number) and around 1500 Hz. I don't see anything
jumping out at me in any of the low-frequency bands that indicates an 
artifact restricted to pump-on times. 

The region around 1500 Hz is harder to interpret because of different average 
quad violin mode excitations and associated up-conversion.

Fig 1 - 28.5-28.8 Hz
Fig 2 - 57.0-57.6 Hz
Fig 3 - 85.5-86.4 Hz
Fig 4 - 114.0-115.2 Hz
Fig 5 - 1480-1520 Hz
Images attached to this comment
H1 General
jeffrey.bartlett@LIGO.ORG - posted 13:40, Thursday 08 December 2016 (32366)
Ops Day Mid-Shift Summary

Earthquakes continue to occur throughout the Pacific. Latest are a 5.2 off Chile, and two more 5.2 off the Solomon’s. Microseism had dropped below 1.0um/s but is now back up to over 8.0um/s. Continue to hold the IFO in DOWN until things settle down.   

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