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ID Date Author Type Category Subject Text Attachments
  10232   Thu Jul 17 17:39:57 2014 KojiUpdateElectronicsPDFR debugging attempt : REFL11What is the coupling factor between the
RF in and the RF mon of the demodulator?
  
  10231   Thu Jul 17 17:19:25 2014 SteveUpdatePSLPSL Innolight controller fan is dying with extra fan

    

       
            
 fanadded.png 
  10230   Thu Jul 17 17:08:58 2014 HarryUpdateGeneral1X2 Rack Changes Purpose
 
Steve and I moved some things around
 1X2Changes.png 
  10229   Thu Jul 17 16:39:34 2014 NichinUpdateElectronicsPDFR debugging attempt : REFL11In a attempt to debug the values of transimpedance
generated by the PDFR system, I did a manual
measurement for REFL11 PD.
 REFL11_17-07-2014_154534.pdfREFL11_17-07-2014_154534.zip 
  10227   Thu Jul 17 16:07:34 2014 Emily UpdateElectronicsVCO DriverI took back he VCO driver that Reetika
brought over to the 40m from the PSL lab.
 
  
  10226   Thu Jul 17 02:57:32 2014 AndresUpdate40m Xend Table upgradeFInish Calculation on Current X-arm mode MatchingData and Calculation for the
Xarm Current Mode Matching
 RawDataForTheModeGreenScan.pngResultForModeMatching.pngDataAndCalculationOfModeMismatch.zip 
  10225   Thu Jul 17 01:24:35 2014 ranaUpdateIOOMC / EOM Stability Mystery Solved!MC loop is near
unstable. Common gain reduced. Needs more
 MC_OLG.pdf 
  10224   Thu Jul 17 00:38:30 2014 JenneUpdateLSCRIN in arm transmission[Rana, Jenne]
We had a look at the RIN of the transmission
signals TRX and TRY, when the arms were individually
 TransRIN.pdf 
  10223   Wed Jul 16 23:02:16 2014 KojiSummaryElectronicsBode Plots and complete Characterization of Frequency CounterIf I assume 1sample delay for 0.1s sampling
rate, the delay is Exp[-I 2 pi f T], where
T is the sampling period.
  
  10222   Wed Jul 16 22:17:40 2014 AkhilSummaryElectronicsBode Plots and complete Characterization of Frequency CounterGoal:
To estimate the transfer function
and the noise in the FC that is a part of
 Phase_Data.zipBode100MHz.png 
  10221   Wed Jul 16 21:24:41 2014 ReetikaUpdateElectronicsVCO Driver inside 40m  
I
found the VCO driver, that Rana asked me
  
  10220   Wed Jul 16 21:23:35 2014 ManasaUpdatePSLPSL Innolight controller fan is dying[Koji, Manasa]
The air flow from the dying fan was
kinda weak and we decided to give a help
 IMG_1659.JPGIMG_1658.JPG 
  10219   Wed Jul 16 19:38:37 2014 manasaSummaryPSLAOM alignment issues and removed from beam pathAOM removed
from the beampath and PMC relocked. 
 AOMremoved.jpg 
  10218   Wed Jul 16 17:34:11 2014 HarryUpdateGeneralFiber Coupled Purpose
To couple the spare NPRO into our
Panda PM980 fibers, in order to carry out
 fiberTestCouplingSchematic.png 
  10217   Wed Jul 16 17:06:41 2014 NichinUpdateComputer Scripts / ProgramsHP8591E spectrum analyzer remote scanUpdated script does the following:
1) Gets the highest 2 peaks
2) Puts a marker on the peaks. Now
 HP8591E_View.pdf 
  10216   Wed Jul 16 15:26:48 2014 SteveUpdatePSLPSL Innolight controller fan is dying

    

       
            
  
  10215   Wed Jul 16 07:51:52 2014 AkhilUpdateGeneralWeekly UpdateWork
Done:

    Solved all the timing
  
  10214   Wed Jul 16 02:22:10 2014 KojiUpdateElectronicsTest run of PDFR systemLog-log ...    
  10213   Wed Jul 16 01:54:25 2014 NichinUpdateGeneralWork plan for next week1) Debugging transimpedance calculations
in the PDFR
Requires
  
  10212   Wed Jul 16 01:46:41 2014 NichinUpdateElectronicsTest run of PDFR systemA test run was conducted on the PDFR system
last afternoon and transimpedance plots were
generated for 6 of the PDs. The laser
 PDFR_testRun_15-07-2014.pdf 
  10211   Wed Jul 16 01:35:16 2014 KojiSummaryLSCPython Wavelet peak finding for dramatic ALS - Red Resonance finding speedupFrom the last plot:
- Subtracting the offset of 0.0095,
the modulation depth were estimated to be
  
  10210   Wed Jul 16 01:27:01 2014 NichinHowToComputer Scripts / ProgramsHP8591E spectrum analyzer remote scanThe script for running continuous scans
on HP 8591E spectrum analyzer is located
at scripts/general/netgpibdata
 HP8591E_View.pdf 
  10209   Wed Jul 16 01:18:02 2014 ranaSummaryLSCPython Wavelet peak finding for dramatic ALS - Red Resonance finding speedupNew script called scripts/ALS/findRedResonance.py
finds the IR resonance in less than 20 seconds.

    Do a ~2 FSR scan of the
 findRedResonance.pdf 
  10208   Wed Jul 16 01:04:09 2014 JenneUpdateLSCData for DARM on sqrtInv investigationI realized while I was looking at last
night's data that I had been doing CARM sweeps,
when really I wanted to be doing DARM sweeps. 
  
  10207   Tue Jul 15 22:23:51 2014 AndresUpdate40m Xend Table upgradeScan the Xarm for the mode matching Nick and I with the help of Jenne
scan the green light when the cavity is unlocked.
Nick placed a Beam dump on the IR so that
  
  10206   Tue Jul 15 21:43:28 2014 JenneUpdateLSCQPDs backI removed the dumps in front of the trans
QPDs.  The Yend QPD needed re-normalization,
so I did that.
  
  10205   Tue Jul 15 18:39:04 2014 HarryUpdateGeneralWeekly Plan (7.16.14) The Past Week
 
Attempted to design coupling telescope,
  
  10204   Tue Jul 15 18:26:40 2014 HarryUpdateGeneralBeam Waist, Telescope, and Fiber Coupling Goal
To design an optical setup (telescope
/ lens) to couple 1064nm NPRO light into
 fiberTestingSetup.pngfiberTestingCouplingDesign.pngfiberTesting.zip 
  10203   Tue Jul 15 17:34:01 2014 manasaUpdatePSLproposing AOM re-alignmentI am going to tweak the alignment of the
beam into the AOM (before the PMC) tomorrow
morning. If anybody has any objections to
  
  10202   Tue Jul 15 12:36:17 2014 NichinUpdateElectronicsRF cables rerouted

    

       
            
  
  10201   Tue Jul 15 11:04:05 2014 SteveUpdatesafetysafety glasses must be worn all times!This is the third safety glasses that I
found laying around in the IFO lab lately.
Safety
 safetyglasses.jpg 
  10200   Tue Jul 15 01:41:43 2014 JenneUpdateLSCData for DARM on sqrtInv investigationI took some data tonight for a quick look
at what combinations of DC signals might
be good to use for DARM, as an alternative
  
  10199   Tue Jul 15 01:31:13 2014 AkhilSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedThe attached are the PSD plots with improved
FC timing(with the same code as in http://nodus.ligo.caltech.edu:8080/40m/10151).
More plots(Phase and PSD) to follow.
 qnoise.pngqnoise.pdf 
  10198   Tue Jul 15 00:16:52 2014 JenneUpdateSUSPRM significantly pitchedI'm starting to lock for the night, and
I noticed that PRM is very, very pitched. 
Why?  
  
  10197   Mon Jul 14 17:51:34 2014 NichinUpdateComputer Scripts / ProgramsMEDM for PDFR systemA  14.png 
  10196   Mon Jul 14 16:51:07 2014 NichinUpdateElectronicsMartian table updated, Named server restarted [Nichin, Jenne]
The martian lookup tables are located
at 
  
  10195   Mon Jul 14 16:19:41 2014 AndresUpdate40m Xend Table upgradeTook the measurement for the Mode Matching Nick
and I measured the reflected power of the
green light in locked and unlocked. I'm working
  
  10194   Mon Jul 14 14:28:27 2014 KojiSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedLooks good. Now you have the internal timer
to verify the external clock. 
If you can realize the constant rate
  
  10193   Mon Jul 14 13:03:23 2014 AkhilSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedMain
Problem:
The frequency counter (FC) takes
 0.2timinganalysis.png0.3timinganalysis.png0.5timinganalysis.png1stiminganalysis.pngpdf.zip 
  10192   Mon Jul 14 12:49:07 2014 NichinUpdateElectronicsNew Prologix GPIB-Ethernet controller

    

       
            
  
  10191   Sun Jul 13 17:06:35 2014 AndresUpdate40m Xend Table upgradeXarm Table Upgrade Calculation and Diagrams of possible new table layout Current Mode Matching
and Gouy Phase Between Steering Mirrors
 CurrentOpticalLayout.pngNewSetUp.PNGAlaModeSolutionplots.pngEntireScaleRangeAlaModeSolution.pngNewXarmOptimizationFromFaraday.m 
  10190   Sun Jul 13 11:37:36 2014 JamieUpdateElectronicsNew Prologix GPIB-Ethernet controller

    

       
            
  
  10189   Fri Jul 11 22:28:34 2014 ChrisUpdateCDSc1auxex "Unknown Host"

    

       
            
  
  10188   Fri Jul 11 22:02:52 2014 Jamie, ChrisOmnistructureCDScdsutils: multifarious upgradesTo make the latest cdsutils available in
the control room, we've done the following:
Upgrade pianosa to Ubuntu 12 (cdsutils
  
  10187   Fri Jul 11 20:05:34 2014 JenneUpdateLSCQPD dark noise checkoutThe other day, I took spectra of the Yend
transmission QPD dark noise for several different
configurations of the transimpedance gain
 TransQPDY_darkNoise_vs_TransimpedanceGain_9July2014.pdfTransQPDY_darkNoise_vs_WhiteningGain_9July2014.pdfsqrtTrans_sensitivity.pngsqrtTrans_Noise_vs_CARMoffset.png 
  10186   Fri Jul 11 17:49:12 2014 NichinUpdateElectronicsNew Prologix GPIB-Ethernet controllerI have configured a NEW Prologix GPIB-Ethernet
controller to use with HP8591E Spectrum analyzer
that sits right next to the control room
  
  10185   Fri Jul 11 15:29:26 2014 HarryUpdateGeneralTelescope With Collimator I used a la mode to make a design
for the coupling telescope with a 3.3um target
waist, that included the collimator in the
 telescope_2.ziptelescopeWCollimator.png 
  10183   Fri Jul 11 11:51:03 2014 NichinUpdateElectronicsPDFR: List of DC transimpedancesThe following
values are going to be entered in the param_[PDname].yml
file for each PD. I am elogging them for
  
  10182   Fri Jul 11 09:41:43 2014 not KojiUpdateGeneralCoupling telescope design

    

       
            
  
  10181   Fri Jul 11 08:11:56 2014 SteveUpdateCDSETMX needs help   ETMX.png 
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