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  40m Log, Page 57 of 341  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  9004   Tue Aug 13 11:40:19 2013 Alex ColeSummaryElectronicsRFPD Demod Filter Frequency Response Measurement For the RF PD Frequency Response
Measurement project, we get each PD signal
from the "PD RF Mon" output of
 photo_(3).JPGtest.jpg 
  9009   Tue Aug 13 21:49:32 2013 KojiSummaryGeneralTesting new AG4395A network analyzerNew AG4395, sn MY41101114  for West
Bridge Labs was delivered. For the test purpose
it is at the 40m now.
 AG4395A_noise.pdf 
  9010   Tue Aug 13 22:21:12 2013 KojiSummaryGeneralMinicircuit Filter TFs (AG4395A test)As a part of the network analyzer test
in the previous entry, the transfer functions
of Mini-Circuits filters we have at the 40m
 Minicircuit_LPF.pdfMinicircuit_BPF.pdfMinicircuit_HPF.pdf130813.zip 
  9012   Thu Aug 15 01:51:50 2013 KojiSummaryGeneralRFM<->Dolphin bridge distributed to c1rfm and c1mcsSince the RFM-Dolphin bridges for the ASX
model was added to the c1rfm model, c1rfm
kept timing-out from the single sample time
  
  9021   Sun Aug 18 16:04:07 2013 ranaSummaryCDSFB lights all RED: mxstream restartSun Aug 18 15:52:50 2013
Found the FB lights (C1:FEC-NN_FB_NET_STATUS
and C1:DAQ-DC0_C1XXX_STATUS) RED for everything
 IFO-Trend.png 
  9022   Sun Aug 18 17:56:16 2013 ranaSummaryCDSMEDM Screen CPU UsagesI noticed at LLO (?) that the LSC screen
there uses up ~25-30% of the CPU time on
a single core for the control room iMac workstations
 obama1404_666531c.jpg 
  9042   Tue Aug 20 16:23:41 2013 ranaSummaryGeneral/home/cds nearly full/home/cds is >98% full - below are some
of the usage numbers:
  
  9044   Wed Aug 21 00:18:03 2013 MasayukiSummaryGreen LockingX-arm PDH OLTF measurement[Manasa Masayuki]
Today we measured the openloop transfer
function of the PDH green lock of the x-arm.
 IMG_1226.JPGIMG_1228.JPG 
  9045   Wed Aug 21 17:42:03 2013 ranaSummaryGeneral/home/cds nearly fullOne of the reasons that our disk is getting
full is due to the scripts_archive directory.
A backup script runs on op340m and makes
  
  9047   Wed Aug 21 19:37:25 2013 MasayukiSummaryGreen LockingX-arm PDH OLTF measurement[Manasa, Masyauki]

Today we measured OLTF of PDH green
 OLTF_PDH_Glock_6_5_2.png 
  9054   Thu Aug 22 20:25:28 2013 MasayukiSummaryGreen LockingY-arm PDH OLTF measurement[Manasa, Masayuki]
We measured the the openloop transfer
function of the PDH green lock of the y-arm.The
 OLTF_PDH_Glock_yarm_7.png 
  9089   Fri Aug 30 01:01:28 2013 rana, nicSummaryComputer Scripts / ProgramsaLIGO Noise Budget code installed and runningChris Wipf has been developing a new Noise
Budget code that allows us to use our existing
Simulink models to handle all of the noise
 NBplots.pngScreen_Shot_2013-08-30_at_1.00.02_AM.png 
  9123   Wed Sep 11 23:34:37 2013 MasayukiSummaryGreen LockingALS locking in both arms[manasa, masayuki]
We locked the XARM and YARM with
using ALS control loop and
 noise.pdf 
  9124   Wed Sep 11 23:43:10 2013 KojiSummaryGreen LockingALS locking in both armsWhat was the beat freq for each arm?
The HF noise level depends on the
frequency of the beat note.
  
  9125   Thu Sep 12 00:07:26 2013 MasayukiSummaryGreen LockingALS locking in both arms

    

       
            
  
  9147   Fri Sep 20 20:14:52 2013 ranaSummaryGeneral/home/cds nearly full

    

       
            
  
  9156   Tue Sep 24 20:43:45 2013 masayukiSummarySUSoptical levers centeringI centered optical levers of ITMX,BS,ETMY.
I also change the position of optical levers
of ITMX, ETMY, ITMY, BS on Friday night(9/21),
 Screenshot-Untitled_Window.pngScreenshot-Untitled_Window-1.png 
  9158   Wed Sep 25 08:11:01 2013 MasayukiSummaryLSCLSC calibration screen 
  
 plot.pdfScreenshot.pngScreenshot-1.pngfringe.pdf 
  9161   Wed Sep 25 23:15:11 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM lockingI measured some error signal, OLTFs and
responses for FPMI noise estimation. Especially
we are interested in the noise from in-loop
 fpmibd.pdf 
  9162   Wed Sep 25 23:59:29 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM locking 
Measurement
 XARM_OLTF.pdfYARM_OLTF.pdfXARM_ITMXresponse.pngYARM_ITMYresponse.pngfree_running.pdf 
  9163   Thu Sep 26 01:49:28 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM locking 
 Measurement
 MICH_OLTF.pdfBS-RS55Q.pngETMX-RS55.pngETMY-RS55.pngplot.pdf 
  9182   Tue Oct 1 14:12:22 2013 ranaSummaryCDSsvndumpfilter on linux1 makes NFS slow Yesterday and this morning's slow
NFS disk access was caused by 'svndumpfilter'
being run at linux1 to carve out the Noise
  
  9184   Tue Oct 1 19:42:19 2013 ranaSummaryCDSmegatron upgradeMax and
I started upgrading megatron to Ubuntu 12.NN
today. We were having some troubles
  
  9191   Thu Oct 3 02:43:34 2013 rana, jenneSummaryLSCPRMI: comparison of 1f and 3f signals w/ calibrationThe attached plot shows the spectra of
all the REFL signals with the PRMI SB lock.
We excited the ITMY_LSC with 3000
 REFL_signals_CalLinesLinedUp.pdf 
  9205   Sun Oct 6 17:05:49 2013 ranaSummaryIOOMC ASC problemsMC unlocked over the weekend and also got
severely mis-aligned. It all started around
midnight on Saturday.
 mcasc.pdf 
  9207   Sun Oct 6 20:55:08 2013 ranaSummaryASCMC WFS Limits set based on 40 days of trendsMC3 watchdog gets tripped sometimes when
lock is lost. I noticed that there were no
limits set in the MC WFS drive. The attached
 mcwrfs_trend.png 
  9216   Mon Oct 7 18:32:01 2013 John ZweizigSummaryComputer Scripts / Programsnds2 installed, restartedThe upgrade of megatron broke the nds2
service. I have fixed things by
  1) installing the latest version
  
  9218   Mon Oct 7 18:39:29 2013 JenneSummaryLSCPRMI: REFL11 beam realigned

    

       
            
  
  9324   Thu Oct 31 21:22:00 2013 rana, kojiSummaryIOOmodulation beat note in MC servoI hooked up the 4395 to the MC servo board
test out (TP2A) and looked at the spectrum
using our new SPAG4395.py script. We noticed
 13031.png13031_200.png13031_200b.png 
  9326   Fri Nov 1 17:01:46 2013 GabrieleSummaryLSCSimulation of REFL_3f signal when the arms come in I simulated how the 3f signal is
affected by the resonance condition of the
arms.
 refl_3f_I_vs_cavity_tuning_noresf2.pngrefl_3f_I_vs_cavity_tuning.png 
  9327   Fri Nov 1 17:44:06 2013 KojiSummaryLSCSimulation of REFL_3f signal when the arms come inYes, the resonance of the 2nd-order sidebands
to the IFO screws up the 3f scheme.
2f (~22MHz) and 10f (~110MHz) are
  
  9332   Sun Nov 3 00:05:52 2013 CharlesSummaryISSISS Update - Bout' timeRight near the end of summer, I had an
ISS board that was nominally working, but
had a few problems I couldn't really sort
 full-op-loop.pngfull-cl-loop.pngreq-vs-meas.png 
  9337   Mon Nov 4 14:11:23 2013 GabrieleSummaryLSCSimulation of REFL_3f signal when the arms come in

    

       
            
  
  9430   Wed Nov 27 18:31:26 2013 KojiSummaryLSCAdittion of the ALS error signals to the LSC input matrixThe
Phase tracker outputs (= ALS X/Y error signals)
are now conveyed to the LSC model.
  
  9440   Wed Dec 4 15:43:13 2013 JenneSummaryLSCPut LSC DAQ channels backLast week, Koji cleaned up the LSC model
to make it much more readable, while he was
working on piping the ALS signals to the
  
  9476   Sun Dec 15 20:37:41 2013 ranaSummaryTreasureThere is a Wagonga in the container that Steve does not believe inFrom Linda and Bram:  WagSu.pdfWagonga.jpgMandehlingMedStrong.jpg 
  9490   Wed Dec 18 17:28:50 2013 GabrieleSummaryLSCEstimate of the PRC length errorMeasurement 
Looking back at what I did in april
(see log
 data_fit2.pngdata_kick.pngpop110_vs_dL.pngpop110_vs_dL.png 
  9493   Thu Dec 19 12:51:57 2013 JenneSummaryLSCEstimate of the sign of the PRC length errorMy hunch is that the PRC is SHORT
by a few cm, not long. 
In my Optickle simulation, the sidebands
 DesignLength.pngPlus5cm.pngMinus5cm.png 
  9495   Thu Dec 19 18:33:25 2013 GabrieleSummaryLSCEstimate of the sign of the PRC length errorMaybe I'm getting confused,
but I still believe there is no way to decide
the direction from yesterday's measurement.
  
  9498   Fri Dec 20 00:16:39 2013 KojiSummaryCDSRCG parsing bug?A
while ago, I noticed that the most significant
bits of the LSC whitening DOs are not toggling.
 Bit2Word1.pngBit2Word2.png 
  9503   Fri Dec 20 11:40:13 2013 JamieSummaryCDSRCG parsing bug?I submitted a bug report for this:
https://bugzilla.ligo-wa.caltech.edu/bugzilla3/show_bug.cgi?id=553
However, given how old our RCG version
  
  9505   Fri Dec 20 18:00:02 2013 KojiSummaryCDSRCG parsing bug?The bug is still there but the incorrect
bits are now overridden.
 Screenshot-c1lsc-LSC.png 
  9511   Tue Dec 31 23:19:58 2013 KojiSummaryGenerallinux1 RAID crash & recoveryDec 22 between 6AM and 7AM, physical or
logical failure has occure on the 4th disk
in the RAID array on linux1.
  
  9512   Wed Jan 1 15:01:29 2014 KojiSummaryGeneralIFO recoveryIFO restart after the recovery of
linux1
Machine recovery in the following
  
  9513   Thu Jan 2 10:15:20 2014 JamieSummaryGenerallinux1 RAID crash & recoveryWell done Koji!  I'm very impressed
with the sysadmin skillz.
  
  9516   Fri Jan 3 11:18:41 2014 SteveSummaryVACpower supply replaced with a short vent

    

       
            
 rebootVENT.png 
  9517   Fri Jan 3 15:19:39 2014 ranaSummaryPSLPSL pointing monitoring This  PSL_pointing_2013.png 
  9518   Fri Jan 3 18:21:45 2014 ranaSummaryPSLPSL pointing monitoring 
 I went to the PSL table to
re-align the input pointing to the IMC. After
  
  9519   Mon Jan 6 16:30:31 2014 JenneSummaryPSLPSL pointing monitoringI'm not sure which pointing Rana wanted
to fix today, but here's a measurement of
the MC spots.  They actually look pretty
 MCspots_6Jan2014.png 
  9520   Mon Jan 6 16:32:40 2014 KojiSummaryGenerallinux1 RAID crash & recoverySince this configuration change, the daily
backup was speeded up by factor of more than
two.
  
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