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ID Date Author Type Category Subjectup Text Attachments
  7975   Thu Jan 31 15:20:46 2013 ZachUpdateLockingMode spacing calcI should mention that I just found a bug
in how it treats odd-mirror-number cavities.
For such cavities, HG modes with odd horizontal
  
  17715   Wed Jul 26 00:30:16 2023 HirokiUpdateBHDMode-matching breadboard for BHD OMCsCurrently, I'm constructing the mode-matching
telescope on a breadboard for the alignment
of two OMCs for BHD.
 InputSystem.jpg 
  17722   Thu Jul 27 03:39:57 2023 HirokiUpdateBHDMode-matching breadboard for BHD OMCsI almost finished constructing the mode-matching
breadboard today.

What I did on July 26th:
 ModeMatchingTelescopeBreadboard.jpgBeamProfileFromCollimator.pdf 
  17739   Tue Aug 1 02:51:46 2023 HirokiSummaryBHDMode-matching breadboard for BHD OMCsMode-matching
breadboard has been constructed

I
have constructed the mode-matching breadboard
 MMTBBdrawing.pdfResultingBeamProfile.pdfMMTBBphoto.jpg 
  6399   Sat Mar 10 15:29:47 2012 ZachHowToComputer Scripts / ProgramsModeMatchrFor your mode matching pleasure, I  MMrLogo.png 
  6415   Wed Mar 14 13:27:15 2012 ZachHowToComputer Scripts / ProgramsModeMatchrI have added to ModeMatchr the capability   
  17166   Fri Sep 30 18:30:12 2022 AnchalUpdateASSModel ChangesI updated c1ass model today to use PR2
PR3 instead of TT1 TT2 for YARM ASS. This
required changes in c1su2 too. I have split
  
  17185   Wed Oct 12 14:01:23 2022 RadhikaUpdateASSModel Changes[Anchal, Radhika]

We proceeded with the TODO items
from [17166].
 YARM_ASS.png 
  17186   Wed Oct 12 18:18:16 2022 ranaUpdateASSModel ChangesAlthough we've usually used this empirical
way to run the alignment, I'd prefer
if we had an analytic / numerical model for
  
  3324   Thu Jul 29 20:43:32 2010 GopalSummaryOptic StacksModeling Tips and TiltsI have discovered a method of completely  XTrans_XDisp.pngXTrans_XDisp.pngYTrans_XDisp.pngZTrans_XDisp.png 
  11060   Tue Feb 24 01:57:01 2015 JenneUpdateLSCModelled effect of relative modulation phaseI have used Optickle to model the effect
of changing the phase between the 11MHz and
55MHz EOMs.  Also, I have looked at
 ChangeInAngle_PRCLvsMICH.pngREFL33_MICH_SensMat_vsModulationOrder_vsModulationPhase.pngREFL33_SensMat_vsModulationPhase.pngREFL33_PRCL_nominalVsLoweredGamma.pngREFL33_MICH_nominalVsLoweredGamma.png 
  11072   Thu Feb 26 00:20:54 2015 ericqUpdateLSCModelled effect of relative modulation phaseI'm working on some more modelling
investigations of this whole situation. The
main thing I wanted to do was to look at
 33budget_canceled.png33budget_nominal.png2015-02-ModPhase.zip 
  11074   Thu Feb 26 01:53:35 2015 KojiUpdateLSCModelled effect of relative modulation phaseOk... This is what I was afraid of, and
it seems true.
i.e. the relation ship of the modulations
  
  404   Wed Mar 26 13:41:53 2008 AndreyHowToSUSModification of ''C1DRIFT_MONITOR''I learned how to modify the drift-monitor
 in MEDM so that values on it change colors
from green to yellow to red depending how
  
  5703   Wed Oct 19 17:21:16 2011 KojiSummaryLSCModification on the RFPD interface cardsI have modified all of the three RFPD interface
cards to be enabled permanently.
This
 D990543-B_mod.pdf 
  5402   Wed Sep 14 01:21:17 2011 JenneUpdateAdaptive FilteringModifications to LSC, RFM models, added OAF model[Jenne, Mirko, with supervision from Jamie]
We are starting to create the new
OAF model, so that it works with the new
  
  5404   Wed Sep 14 12:01:05 2011 ranaUpdateAdaptive FilteringModifications to LSC, RFM models, added OAF modelFor the acquisition of the MC_F channel,
I suggest taking the FAST_MON BNC output
from the blue FSS interface card in the Eurocard
  
  5449   Sun Sep 18 15:34:09 2011 KojiUpdateAdaptive FilteringModifications to LSC, RFM models, added OAF model[Koji Kiwamu]
This
modification of the LSC model made the rows
  
  6110   Tue Dec 13 01:20:38 2011 DenUpdateAdaptive FilteringModifications to LSC, RFM models, added OAF model

    

       
            
  
  2922   Wed May 12 12:32:04 2010 josephbConfigurationCDSModified /etc/rc.d/rc.local on megatronI modified the /etc/rc.d/rc.local file
on megatron removing a bunch of the old test
module names and added the new lsc and lsp
  
  2542   Fri Jan 22 12:33:37 2010 josephb, alexUpdateComputersModified CDS_PARTS for Binary outputTurns out the CDSO32 part (representing
the Contec BO-32L-PE binary output) rquires
two inputs. One for the first 16 bits, and
  
  17219   Tue Nov 1 17:17:27 2022 AnchalUpdateSUSModified F2A filter design and trial on MC1After a quick discussion with Yuta, we
figured that the introduction of a finite
Q that Peter Fritschel does in this DCC doc
 20221101_MC1_F2A_Filters_Q_On_Both.pdf 
  11574   Fri Sep 4 09:23:32 2015 IgnacioUpdateCDSModified Pentek schematicAttached is the modifed Pentek whitening
board schematic. It includes the yet to be
installed 1nF capacitors  and comments. 
 schematic.pdf 
  15941   Thu Mar 18 18:06:36 2021 gautamUpdateElectronicsModified Sat Amp and Coil DriverI uploaded the annotated schematics (to
be more convenient than the noise analysis
notes linked from the DCC page) for the 
  
  4251   Fri Feb 4 15:03:20 2011 josephbUpdateComputersModified cshrc.40mRemoved
some lines from the PATH environment variable
since they point to old codes which no longer
  
  3940   Wed Nov 17 16:02:30 2010 josephbUpdateCDSModified feCodeGen.pl to fix filtMuxMatrix name generationProblem:
Sometime in the last 3 weeks, probably
when Alex brought his latest changes from
  
  3860   Thu Nov 4 15:15:43 2010 josephbUpdateCDSModified feCodeGen.pl, fmseq.pl, and suspension screensFeature Requested:
Have the CPU_meter change change
color at various alarm levels.  These
  
  3606   Fri Sep 24 22:58:40 2010 josephbUpdateCDSModified front end medm screensTo startup medm screens for the new suspension
front end, do the following:
1) From a control room machine, log
  
  3609   Sun Sep 26 18:29:23 2010 rana, JohnUpdateCDSModified front end medm screensIssues
 megamind-poster3.jpg 
  3794   Wed Oct 27 11:34:40 2010 josephbUpdateCDSModified rc.local for front end machinesWhat was the problem:
On reboot, c1sus was in a strange
state.  The epics IOC was running, along
  
  3919   Mon Nov 15 11:13:12 2010 josephbUpdateCDSModified rc.local to not start mx_streams automaticallyProblem:
c1iscex floods the network with about
1 gigabyte of error messages in a few seconds,
  
  4918   Thu Jun 30 06:54:07 2011 josephbUpdateCDSModified the automated scripts for producing model webviewsDave Barker pointed out last week that
the webview of our simulink model files,
generated from the installed models (i.e.
  
  11114   Sat Mar 7 19:15:17 2015 JenneUpdateLSCModified zero crossing triggeringMore work from yesterday. 

Rana and I had discussed on Thursday
night that we probably want to be able to
 LatchLogic_6March2015.png 
  11216   Mon Apr 13 19:34:02 2015 ericqUpdateIOOModulation Frequency Tuned to IMC LengthI've been fiddling with the mode cleaner
and green beat box today, to try and get
an absolute frequency calibration for MC2
 fMod_tuning.pdf 
  8264   Sat Mar 9 19:29:27 2013 KojiUpdatePSLModulation depthLast night I measured the modulation depth
of the MC incident beam.

Method:
 mod_depth.pdf 
  15715   Mon Dec 7 22:54:30 2020 gautamUpdateLSCModulation depth measurementSummary:

I measured the modulation depth
at 11 MHz andf 55 MHz using an optical beat
 modDepth.pdf 
  15769   Sat Jan 16 18:59:44 2021 gautamUpdateLSCModulation depth measurementI decided to analyze the data I took in
December more carefully to see if there are
any clues about the weird LSC sensing.
 PLL.pdfmodDepth.pdfmodProfile.pdfEOMpath_postMod.pdf 
  13642   Tue Feb 20 13:59:30 2018 KojiUpdateGeneralModulation depth measurement for an aLIGO EOMLast night I worked at the PSL table for
the modulation depth measurement for an aLIGO
EOM. Let me know if the IFO behavior is unusual.
  
  13652   Thu Feb 22 17:19:47 2018 KojiUpdateGeneralModulation depth measurement for an aLIGO EOMaLIGO
EOM test: Setup


The modulation signal was
 IMG_3436.JPGmodulation_depth.pdfmodulation_linearity.pdfmodulation_24MHz.pdf 
  13725   Mon Apr 2 15:14:21 2018 KojiUpdateGeneralModulation depth measurement for an aLIGO EOMThe new matching circuit was tested.

Results:
 modulation_depth.pdfimpedance_eom.pdf 
  13819   Sat May 5 22:32:07 2018 KojiUpdatePSLModulation depth measurement for the 3IFO aLIGO EOM The 3IFO EOM was formerly tuned as the
H2 EOM, so the resonant frequencies are different
from the nominal aLIGO ones.
  
  13818   Sat May 5 20:30:21 2018 KojiUpdatePSLModulation depth measurement for the 3IFO aLIGO EOM and aftermathCaution:
Because of this work and my negligence, the
RF output of the main Marconi for the IFO
  
  13842   Tue May 15 10:42:14 2018 KojiUpdatePSLModulation depth measurement for the 3IFO aLIGO EOM and aftermathThe marconi RF output was turned on and
thus the RF generator condition was restored
to the nominal state on Friday 11th.
  
  13593   Wed Jan 31 16:29:42 2018 gautamUpdateALSModulation depthsI used the Beat
Mouth to make a quick
 PMCmodDepth.pdfXPDH.pdf 
  16952   Mon Jun 27 18:54:27 2022 yutaUpdateLSCModulation depths measurement using Yarm cavity scan[Yehonathan, Yuta]
EDITED
by YM on 22:11 June 27, 2022 to correct for
 YarmModIndex.png 
  10314   Thu Jul 31 23:43:00 2014 KojiUpdateIOOModulation frequency adjustmentThe main IFO modulation frequency was adjusted
to match with the FSR of the IMC.
The new frequency is 11.066128 MHz.
  
  17789   Wed Aug 16 16:42:22 2023 RadhikaSummaryGeneralMoku Go/Pro delay measurementsI measured the Moku:Go and Moku:Pro delay
using a Agilent 4395A network analyzer. I
considered the PID controller (0 dB gain); the
 MokuGo_delay.pdfMokuPro_delay.pdf 
  17803   Tue Aug 22 16:44:08 2023 RadhikaSummaryGeneralMoku Go/Pro delay measurementsHere are the results for Moku Go/Pro delay
measurements with the filter shapes removed
[Attachments 1, 2]. The PID
 MokuGo_delay.pdfMokuPro_delay.pdfScreenshot_2023-08-22_at_11.30.10.pngScreenshot_2023-08-22_at_11.33.54.png 
  17436   Tue Jan 31 20:49:46 2023 AnchalUpdateALSMoku Phasemeter AM coupling and comparisonModel changes and addition of
Moku Phasemeter

Today
I setup Moku:Pro MP1 with phasemeter app
 ALS_DFD_Phase_Tracker_Mode.pngALS_Moku_Phasemeter_Mode.pngMokuPhaseMeter_AM_Coupling_TF_and_Noise.pdfPhaseMeasurementComparisonWithSimulatedRFsource.pdf 
  17438   Wed Feb 1 11:52:13 2023 AnchalUpdateALSMoku Phasemeter AM coupling and comparisonI wondered if Moku could have lied about
its noise measurement since the RF source
was the same Moku device. To avoid this bias,
 6x 
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