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ID Date Author Type Category Subjectup Text Attachments
  4510   Mon Apr 11 14:17:22 2011 josephb, jamieUpdateCDSFrame wiper script installed[Joe, Jamie, Alex]
Fixes:
I
asked Alex which cron to use (dcron? frcron?). 
  
  4109   Wed Jan 5 00:23:30 2011 ranaSummaryDAQFrameBuilder fails in a new waySince Leo was trying to demo his LIGO Data
Listener code, he noticed that there was
and NDS2 issue. The NDS2 guy (JZ) noticed
  
  4112   Wed Jan 5 16:00:11 2011 rana, alexSummaryDAQFrameBuilder fails in a new wayEmail from Alex:
  
  4115   Wed Jan 5 22:14:41 2011 ranaSummaryDAQFrameBuilder fails in a new wayJust a proof that the DAQ is working -
ran DTT on nodus from 3 hours ago.
 Screen_shot_2011-01-05_at_10.13.21_PM.png 
  14356   Thu Dec 13 22:56:28 2018 gautamUpdateCDSFrames[koji, gautam]

We looked into the /frames situation
a bit tonight. Here is a summary:
  
  4319   Thu Feb 17 23:41:46 2011 ranaFrogsDAQFrames Directory got the wrong name: Data unreachableDTT stopped working for recent data. An
'ls' in the frames/full/ directory reveals:
drwxr-xr-x 2 controls controls
  
  13356   Wed Oct 4 17:18:15 2017 gautamUpdateCDSFree DAC channels in c1lscThere are at least 5 free DAC channels
(4 if you discount the one channel from these
that I am hijacking) available in the 1Y2
  
  9159   Wed Sep 25 17:07:08 2013 ranaFrogsTreasureFree Green Mango Juice in fridge   aam_pana_recipe.jpg 
  5344   Tue Sep 6 17:43:01 2011 SureshUpdateIOOFree Swing ITMY startedFree swing of ITMY started at
Tue Sep  6 17:41:43 PDT 2011
 
  
  5347   Tue Sep 6 17:56:53 2011 JenneUpdateIOOFree Swing ITMY started


   
        
            
  
  2391   Thu Dec 10 17:13:36 2009 kiwamuUpdateSUSFree swiging spectra under the atmospheric pressureThe free swinging spectra of ITMs, ETMs,
BS, PRM and SRM were measured last night
in order to make sure that nothing wrong
 summary_freeswing.pdf 
  12523   Thu Sep 29 16:19:29 2016 LydiaUpdateSUSFree swing eigenmodes[Lydia, Teng]

Motivated by the strange pitch/yaw
coupling behavior we ran into while doing
 05.pngSUS_eigenmodes.png 
  836   Thu Aug 14 19:08:14 2008 YoichiConfigurationSUSFree swing measurement going onI started free swinging spectra measurement
of all the suspensions now Aug 14 19:05 (PDT).
The watch dogs are all shutdown. Please do
  
  9113   Thu Sep 5 15:18:41 2013 JenneUpdateLSCFree swinging DRMI power buildupsI have the DRMI free swinging right now,
since it's not really locking.  Looking
at these time series in the attached pdf,
 DRMI_free_swing_power_buildups.pdf 
  807   Thu Aug 7 10:07:13 2008 YoichiUpdateSUSFree swinging OSEM spectraLooks like there are more extra peaks in the
SRM than other optics.
Maybe because it is closer to the door ?
 FreeSwingSpectra.pdf 
  808   Thu Aug 7 10:27:59 2008 ranaUpdateSUSFree swinging OSEM spectraSometimes we see extra peaks in the OSEM spectra
coming from a beat between the regular eigenmodes.
This probably comes from the OSEM shadow
  
  2363   Tue Dec 8 03:53:49 2009 kiwamuUpdateSUSFree swinging spectra of ETMX In this night, I checked the free swinging
spectra of ETMX to make sure nothing wrong
with ETMX by the wiping.
 ETMX_air.png 
  7078   Thu Aug 2 11:09:52 2012 EricSummaryLSCFree-Swinging Michelson MeasurementsTo take the free swinging Michelson measurements
for the interferometer calibration Jamie
aligned the beam splitter with ITMX and ITMY.
 free_swing_MICH.png 
  5266   Fri Aug 19 01:15:22 2011 SureshUpdateSUSFreeSwing all opticsI ran "freeswing all" at Fri
Aug 19 01:09:28 PDT 2011 (997776583) 
and "opticshutdown"  as well.
  
  11640   Thu Sep 24 17:01:37 2015 ericqUpdateComputer Scripts / ProgramsFreeing up some space on /cvs/cdsI noticed that Chiara's backup HD (which
has a capacity of 1.8TB, vs the main drives
2TB) was near to getting full, meaning that
  
  5353   Wed Sep 7 00:44:51 2011 JenneUpdateSUSFreeswing allI just started a freeswing all,
as a final check before we pump:
  
  16872   Tue May 24 15:21:13 2022 AnchalUpdateBHDFreeswing tests of new SOS startedI modified the script freeSwing.py
to use damping loop output switches to free
the optic instead of watchdog or coil output
  
  15711   Sat Dec 5 20:44:35 2020 gautamUpdateASCFreq Gen Box re-installedThis work is now complete. The box was
characterized and re-installed in 1X2. I
am able to (briefly) lock the IMC and see
 6x 
  15710   Fri Dec 4 22:41:56 2020 gautamUpdateASCFreq Gen Box revampThis turned out to be a much more involved
project than I expected. The layout is complete
now, but I found several potentially damaged
  
  4239   Wed Feb 2 10:44:26 2011 KojiSummaryGreen LockingFreq fluctuation measured by the freq divider and Rana's analog PFDThe freq fluctuation of the beat note
has been measured with the following condition

    The IR beam only locked
 110201_green_freq_fluctuation.pdf 
  4240   Wed Feb 2 12:55:34 2011 KojiSummaryGreen LockingFreq fluctuation measured by the freq divider and Rana's analog PFDI found that some flakiness of the beat
signals comes from the RF components for
the beat detection.
  
  3565   Mon Sep 13 11:40:50 2010 AlbertoUpdateElectronicsFrequency Box Documentation Added to the SVNI uploaded all the material about the RF
frequency Generation Box  into the SVN under
the path:
 freqBoxSVNdierctoryStructure.png 
  3572   Tue Sep 14 18:07:41 2010 AlbertoUpdateElectronicsFrequency Box Documentation Added to the SVNI completed a LIGO document describing
design, construction and characterization
of the RF System for the 40m upgrade.
  
  10008   Mon Jun 9 09:51:11 2014 Sai AkhilUpdateElectronicsFrequency Error Measurement of UFC-6000 RF Frequency Counter Motivation: 
 
To test the
precision of Mini-Circuits Model UFC-6000
 Data_and_Script_Files.zipError_Measurement_FC.pdfError_freq.jpg 
  3552   Thu Sep 9 12:02:03 2010 AlbertoUpdateElectronicsFrequency Generation Box - Amplitude Noise MeasurementsI measured the amplitude noise of the source
outputs and the EOM outputs of the Frequency
Generation box.
 FreqBoxAmplitudeNoiseMeasurementSetup.pngFreqBoxAmplitudeNoise_BusbyBox_AllChannels.png 
  3530   Tue Sep 7 08:56:00 2010 AlbertoUpdateElectronicsFrequency Generation Box Assembly - Phase Noise MeasurementsHere are the results of my phase noise
measurements on the 7 outputs of the Frequency
Generation Box. (BIN=95L applied by DTT).
 2010-09-03_FreqBoxPhaseNoise_AllOutputsComparison_smooth.png2010-09-03_FreqBoxPhaseNoise_AllOutputsComparison_smooth.pdf 
  3450   Fri Aug 20 16:41:43 2010 AlbertoUpdateElectronicsFrequency Generation Box Assembly CompletedI finished assembling the frequency generation
unit for the upgrade. I tested it through
to check that the power levels are as expected
 7x 
  468   Thu May 8 01:07:24 2008 ranaSummaryLSCFrequency Noise test: MC Trans Backscatter[COLOR=purple][SIZE=4][FONT=Arial]There is
a wandering hump in the MC_F spectrum.[/FONT][/SIZE][/COLOR]
It can move around on the time 
  
  10760   Sun Dec 7 13:11:57 2014 manasaSummaryGeneralFrequency Offset Locking - To Do ListAttached is the timeline for Frequency
Offset Locking related activities. All activities
will be done mostly in morning and early
 FOLtodolist.pdf 
  10791   Fri Dec 12 14:38:39 2014 manasaSummaryGeneralFrequency Offset Locking - To Do List (Revised)Unfortunately the order placed for beam
samplers last week did not go through. These
will be used at the X and Y end tables to
 FOLtodolist.pdf 
  10779   Thu Dec 11 12:39:31 2014 diegoUpdateComputer Scripts / ProgramsFrequency Offset Locking scripts status I finished the polishing in the scripts/FOL directory,   
  1744   Tue Jul 14 16:31:46 2009 ClaraUpdatePEMFrequency Response of Microphone (Bonnie)So, I actually took these measurements
last week, but I didn't get around to making
nice plots and things until now. I figured
 Bonnie_fres_regplot.pdfBonnie_fres_logplot.pdf 
  79   Wed Nov 7 14:01:31 2007 waldmanOmnistructureOMCFrequency and Intensity noiseOne of the biggest problems I had using the
PZT to lock was excessive noise.  I did a
little noise hunting and found that the problem
  
  9200   Fri Oct 4 01:09:33 2013 ManasaUpdateGreen LockingFrequency counter for ALSI checked the BK precision 1856D manual.
I found that although this frequency counter
  
  11736   Thu Nov 5 03:04:13 2015 gautamUpdateCDSFrequency counting - systematics and further changesI've
made a few more changes to the frequency
counting code - these are mostly details
 Systematic_error.pdfsystematics_origin.pdf 
  11709   Fri Oct 23 18:36:48 2015 gautamUpdateCDSFrequency counting - workable setup preparedI've
made quite a few changes in the software
as well as the hardware of the digital frequency
 Yscan.pdf 
  11710   Fri Oct 23 19:27:19 2015 KojiUpdateCDSFrequency counting - workable setup preparedIt is a nice scan. I'm still thinking
about the equivalence of the moving average
and the FIR low pass that I have mentioned
  
  11712   Sat Oct 24 12:34:43 2015 gautamUpdateCDSFrequency counting - workable setup preparedSorry for the confusion - I did mean Green
beat frequency, and I had neglected the
factor of 2 in my earlier calculations. However,
 Yscan.pdfFrequency_readout.pdf 
  11615   Thu Sep 17 19:58:06 2015 gautamSummaryComputer Scripts / ProgramsFrequency counting algorithmI made some changes to the c1tst model
running on c1iscey in order to test my algorithm
for frequency counting. I followed the steps
  
  11628   Mon Sep 21 18:31:06 2015 gautamSummaryComputer Scripts / ProgramsFrequency counting algorithmI have been
working on setting up a frequency counting
module that can give us a readout of the
 6x 
  11629   Mon Sep 21 23:18:55 2015 ericqSummaryComputer Scripts / ProgramsFrequency counting algorithmI definitely think lowpassing the output
is the way to go. Since this frequency readback
will be used for slow control of the beatnote
  
  11631   Tue Sep 22 02:11:17 2015 ranaSummaryComputer Scripts / ProgramsFrequency counting algorithmI was going to suggest using a software
PLL, but perhaps averaging gives the same
result. The same ADC signal can be fed to
  
  11704   Tue Oct 20 17:36:01 2015 gautamUpdateCDSFrequency counting with moving averageI'm working on setting up a moving-average
in the custom C code block that counts the
zero crossings to see if this approach is
  
  11647   Tue Sep 29 03:14:04 2015 gautamUpdateCDSFrequency divider boxEarlier today, the front panels for the
1U chassis I obtained to house the Wenzel
dividers + RF amplifiers arrived, which meant
 IMG_0014.JPGIMG_0015.JPG 
  11684   Mon Oct 12 17:04:02 2015 gautamUpdateCDSFrequency divider box - further testsI carried out some more tests on the digital
frequency counting system today, mainly to
see if the actual performance mirrors the
 calibration.pdfsystematics.pdf 
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