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ID Date Author Type Category Subjectup Text Attachments
  4358   Fri Feb 25 14:35:06 2011 Larisa ThorneUpdateElectronicsTotal harmonic distortion results for +7dBm mixer This experiment deals with measuring
the total harmonic distortion (THD) contribution
 THDcircuit.jpgPhoto_on_2011-01-17_at_12.25.pngTHDwithoutamp.pdf 
  13910   Fri Jun 1 21:47:23 2018 KojiFrogsGeneralTouch screen manipulation of the IFO[Koji Gautam]

We talked about touch interface
of medm. We realized that android (and iOS)
 Screenshot_20180601-214459.png 
  16339   Thu Sep 16 14:08:14 2021 Ian MacMillanFrogs TourI gave some of the data analysts a look
around because they asked and nothing was
currently going on in the 40m. Nothing was
  
  413   Thu Apr 3 19:27:50 2008 AndreySummaryPhotosTour for prospective grad studentsLast Friday (March 28), there was a tour of
40-meter lab for prospective graduate students.
 Rana_Lecturing.pdf 
  10876   Thu Jan 8 03:09:07 2015 JenneUpdateLSCToward variable finesse locking[Jenne, EricQ, Rana]
Tonight we started prepping for an
attempt at variable finesse locking. 
  
  6198   Sat Jan 14 00:50:08 2012 rana, kojiConfigurationIOOTowards coating thermal noise measurement with RefCav / MC beatKoji asked aloud tonight if we could   
  16306   Wed Sep 1 21:55:14 2021 KojiSummaryGeneralTowards the end upgrade- Sat amp
mod and test: on going (Tega)
- Coil driver mod and test: on going
  
  16334   Wed Sep 15 23:53:54 2021 KojiSummaryGeneralTowards the end upgradeOrdered compoenents are in.

- Made 36 more Sat Amp internal
boards (Attachment 1). Now
 P_20210915_231308.jpgP_20210915_225039.jpgP_20210915_224341.jpg 
  5900   Tue Nov 15 22:31:39 2011 MirkoUpdateAdaptive FilteringTowards wiener filtering and improved OAFing
[Jenne, Mirko]
1. We should help the OAF by compensating
 7x 
  13398   Tue Oct 24 16:22:53 2017 gautamUpdateCDSToy DARM model setup in c1tst[alex, gautam]

Alex is going to have an undergrad
work on a calibration optimization project
 TOY_DARM.pngTOY_DARM_SIMULINK.png 
  14626   Mon May 20 21:45:20 2019 MilindUpdate Traditional cv for beam spot motionWent through all of Pooja's elog posts,
her report and am currently cleaning up her
code and working on setting up the simulations
  
  14963   Thu Oct 10 22:11:53 2019 gautamUpdateLSCTrans QPD checkout
I removed the flip-mount that was
installed on the EY in-air table for the
mode-spectroscopy project (see 
 EY_table_20191010.jpegdarkNoise.pdf 
  4875   Fri Jun 24 01:05:32 2011 NicoleSummarySUSTransfer Function Model Analysis Summary and New Posted LED V vs. I CurveI have updated   
  13086   Thu Jun 29 00:13:08 2017 KaustubhUpdateComputer Scripts / ProgramsTransfer Function TestingIn continuation to my previous posts, I
have been working on evaluating the data
on transfer function. Recently, I have calculated
 Correlation_Plot.pdf2x100_Test_Files_and_Code_and_Correlation_Files.zip 
  5713   Thu Oct 20 16:33:24 2011 KatrinUpdateGreen LockingTransfer function YARM PDH boxYesterday, I measured the transfer function
of the YARM PDH box.
 PDH_box.pngSCRN0000.pdf 
  3210   Tue Jul 13 21:04:49 2010 tara,ranaSummaryPSLTransfer function of FSS servo I
measured FSS's open loop transfer function.
 TF_FSS_ser.png 
  1935   Fri Aug 21 18:37:16 2009 JenneUpdateGeneralTransfer function of Mode Cleaner StacksUsing free-swinging Mode Cleaner OSEM data
and Guralp seismometers, I have taken transfer
functions of the Mode Cleaner stacks.
 TF_osems_guralps.png 
  1938   Tue Aug 25 00:35:04 2009 ranaUpdateGeneralTransfer function of Mode Cleaner StacksLooks like all of the accelerometers and
seismometers have been disconnected since
early AM last Monday when Clara disconnected
 Untitled.png 
  886   Tue Aug 26 12:00:45 2008 JenneSummaryPEMTransfer function of Ranger seismometerThis finishes up the calibration that Rana
started in elog # 881.
  
  7204   Thu Aug 16 13:49:33 2012 YaakovUpdatePEMTransfer functions of seismic stacks, differential motion of test massI estimated the transfer function of the
seismic stacks using a rough model I made
based on the LIGO document LIGO
 8x 
  7209   Thu Aug 16 20:04:46 2012 YaakovUpdatePEMTransfer functions of seismic stacks, differential motion of test mass 
 I made the plots a little nicer
and added new sensor noises (from Brian Lantz's
 6x 
  13016   Sat May 27 10:26:28 2017 KaustubhUpdateGeneralTransimpedance CalibrationUsing Alberto's paper LIGO-T10002-09-R
titled "40m RF PDs Upgrade", I
calibrated the vertical axis in the bode
 ET-3040_test_transimpedance.pdfET-3010_test_transimpedance.pdfFormula_for_Transimpedance.pdf 
  10079   Fri Jun 20 11:41:18 2014 NichinUpdateElectronicsTransimpedence measurement-BBPDEDIT:
Please ignore the following data. The revised
 BBPD_readings_06-19-2014.zipBBPD_transimpedence_19thJune2014.pdf 
  10085   Fri Jun 20 19:09:23 2014 KojiUpdateElectronicsTransimpedence measurement-BBPDOh,
nice! This must be a new technique to have
a higher transimpedance by breaking the PD.
  
  10089   Mon Jun 23 21:16:14 2014 NichinUpdateElectronicsTransimpedence measurement-BBPD  [Nichin,
Koji] 
Today
 BBPD_transimpedence_06-23-2014.pdfBBPD_readings_06-23-2014.zip 
  14121   Wed Aug 1 16:23:48 2018 KojiSummaryComputersTransition of the main NFS disk on chiara[Gautam Koji]

Taking the opportunity to shutdown
c1ioo for adding a DAC card, we shutdown
  
  14138   Mon Aug 6 09:42:10 2018 KojiSummaryComputersTransition of the main NFS disk on chiaraFollow up:

- At least it was confirmed that
the local backup (4TB->2TB) is regularly
  
  10947   Wed Jan 28 03:01:24 2015 JenneUpdateLSCTransitioned DARM to AS55Q[Jenne, Diego]

Tonight
we were able to transition DARM from DC transmission
  
  10949   Wed Jan 28 14:19:02 2015 ranaUpdateLSCTransitioned DARM to AS55QWhy AS55/(TRX + TRY) instead of just TRX?
Isn't (TRX+TRY) controlled by CARM?
  
  11090   Tue Mar 3 04:41:45 2015 JenneUpdateLSCTransitioned DARM to AS55Q, some other workBetter elog tomorrow - notes for now:

REFL165 for PRMI has been "a
champ" (quote from Q).  We're
  
  11095   Tue Mar 3 19:19:54 2015 JenneUpdateLSCTransitioned DARM to AS55Q, some other work[Jenne, EricQ]

A slightly more coherent elog for
last night's work.
 ALSfool_PRFPMI_2Mar2015.pdfALSfool_kindaEngaged_2March2015_noFrames.png 
  11096   Wed Mar 4 00:50:36 2015 ranaBureaucracyTreasureTransitioned DARM to AS55Q, some other workJust
in case there was some confusion, the champagne
on my desk is not to be opened
  
  10891   Tue Jan 13 03:58:27 2015 JenneUpdateLSCTransitioned to ASDC MICH (PRMI and PRFPMI)[Jenne, Diego, EricQ]

Hopefully there will be more later,
but Chiara just went down (network? other? 
  
  10896   Tue Jan 13 15:11:30 2015 diegoUpdateLSCTransitioned to ASDC MICH (PRMI and PRFPMI)These are the parameters of the UGF servos
we used last night:

  
  7179   Tue Aug 14 15:58:44 2012 JenneUpdateGeneralTranslation to English: larger optical tables at the ends

    

       
            
  
  7624   Thu Oct 25 15:38:06 2012 RajiUpdateAlignmentTransmitance Measurements on LaserOptik mirrorI measured the transmitted power @1064nm
on one of the LaserOptik mirrors labled SN6
Here is the data
  
  7644   Wed Oct 31 12:58:17 2012 RajiUpdateAlignmentTransmitance Measurements on LaserOptik mirror

    

       
            
 Transmission-plot@1064nm.pdfTransmission-data@1064nm.pdf 
  7648   Wed Oct 31 17:33:39 2012 KojiUpdateAlignmentTransmitance Measurements on LaserOptik mirror...Looks like the coating is out of spec
at any angle for 1064nm. E11200219-v2
  
  7653   Thu Nov 1 10:13:53 2012 jamieUpdateAlignmentTransmitance Measurements on LaserOptik mirror

    

       
            
  
  7654   Thu Nov 1 10:19:11 2012 jamieUpdateAlignmentTransmitance Measurements on LaserOptik mirror

    

       
            
  
  10811   Wed Dec 17 18:14:36 2014 ericqUpdateASCTransmon QPD -> ASC servos ready for comissioning I have completed all of the model
modifications and medm screen updates to
allow for feedback from the  transmon QPD
 newASCscreen.png 
  10157   Tue Jul 8 22:53:02 2014 Jenne, RanaUpdateElectronicsTransmon QPD / whiteningWe need to work farther on checking
out the end transmission QPD electronics
situation. 
  
  10908   Thu Jan 15 18:57:41 2015 ericqUpdateASCTransmon QPD loops liveI've measured the sensing for each
of the arms, by using our calibrated oplevs,
in terms of QPD counts per micron. It is:
 loopDesign.pdf 
  9637   Fri Feb 14 02:09:55 2014 ericqUpdateElectronicsTransmon QPD whitening [Quick post, will follow up with
further detail later. Excuse my sleepy ELOG
writing]
 qpdWhitening.pdf 
  9642   Mon Feb 17 20:35:19 2014 ericqUpdateElectronicsTransmon QPD whiteningMy apologies for all of that crap I left
at the Y-end... I cleaned the rest of it
up today. 
 qpdY2whit.pdfETMY_QPD_whitening.zip 
  1108   Mon Nov 3 19:12:27 2008 albertoUpdateGeneralTransverse mode spacing measurement for the X armI know a lot of expectations have been building
up on these days in the scientific community
at the 40m towards a conclusive elog entry
 2008-11-02_summarizingplot.png 
  4431   Wed Mar 23 10:34:17 2011 josephbUpdateCDSTrend issue fixed[Joe, Alex]
Yesterday during the day, Alex ran
a script to fix the time stamps in the trends
  
  870   Fri Aug 22 13:58:39 2008 SharonSummary Trend of the Wiener TFIn order to understand if we really need an
adaptive filter, I used old data of MC_L
and the accelerometers and seismometer to
 Same_start_time1.pdfsame_length.pdf 
  762   Wed Jul 30 00:42:04 2008 ranaUpdateSUSTrends and file formatsI propose that we do not use .eps format but
.pdf instead. For images like the plots Sharon
has below we should use only .png and for
 Untitled.png 
  594   Sun Jun 29 19:19:47 2008 ranaSummaryIOOTrends of the PSL/IOO Quads over 1000 daysOnly IOO POS has been working for the past
2 years. I guess we should recommission the
IOO ANG and REFL QPDs
 a.png 
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