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  40m Log, Page 339 of 344  Not logged in ELOG logo
ID Date Author Type Categorydown Subject Text Attachments
  8596   Fri May 17 16:06:14 2013 ranaUpdate40m upgradingETMY op table disabled 
 TODO:

    We need to replace all
  
  8597   Fri May 17 18:24:04 2013 AnnalisaUpdate40m upgradingETMY - progressI aligned the green beam into the Faraday.
I needed an HWP to have the right polarization
for the light entering the Faraday itself.
  
  8622   Thu May 23 00:16:32 2013 AnnalisaUpdate40m upgradingETMY - progress [Annalisa, Koji] 
 GREEN
 TransMonAndOplev.jpg 
  8637   Fri May 24 02:12:50 2013 AnnalisaUpdate40m upgradingETMY - Mode Matching for green 
 Mode
Matching calculation for green beam - Yarm
 ModeMatchingGreen.jpgModeMatchingGreenZoom.jpgXYpath.jpg 
  8638   Fri May 24 11:38:00 2013 KojiUpdate40m upgradingETMY - Mode Matching for greenI got confused. Is the mode calculation
in the cavity correct? 
Are you sure the wavelength in the
  
  8639   Fri May 24 12:50:25 2013 AnnalisaUpdate40m upgradingETMY - Mode Matching for green

    

       
            
  
  8645   Sat May 25 02:03:48 2013 AnnalisaUpdate40m upgradingETMY - Mode Matching for green - new calculation Mode
matching calculation for green - Yarm
I
 ModeMatchingGreenNEW.jpgModeMatchingGreenZoomNEW.jpgXYpathNEW.jpgphoto1.JPGphoto2.JPG 
  8646   Mon May 27 21:38:53 2013 AnnalisaUpdate40m upgradingETMY - Beam Dumps 
I put many razor dumps along the
IR/green path. The rejected beam from the
  
  8652   Tue May 28 22:11:23 2013 AnnalisaUpdate40m upgradingETMY - Yarm shutter cable 
 For some strange reason the
Yarm shutter cable runs up to the POY table,
  
  11521   Thu Aug 20 18:08:28 2015 IgnacioFrogs40m upgradingFatality. Something broke.

So
 image1.JPG 
  12625   Fri Nov 18 00:25:08 2016 JohannesOmnistructure40m upgradingAcromag Chassis DevelopmentI had Rich show me his approach to a chassis
for the Acromag modules. The document tree
for his design can be found on the DCC.
 acromag_bareboard.PNGXT_digital_340px_0.jpg 
  12634   Tue Nov 22 13:55:32 2016 JohannesOmnistructure40m upgradingAcromag ChassisCurrent Acromag chassis status:

I found out that Acromag offers
DIN rail mounting kits for the open boards,
 acroplan.pdf 
  10130   Sat Jul 5 04:18:45 2014 AndresUpdate40m Xend Table upgradeAdding Two Lenses After the Second Steering Mirror in Order Two Increase the Gouy Phase Difference Between the Sterring MirrorsI had been working on the Xend table optical
layout update. Since the two steering mirrors
in the Xend green are too close to each,
 7x 
  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 
  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
  
  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
  
  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 
  10237   Fri Jul 18 16:52:56 2014 AndresUpdate40m Xend Table upgradeFInish Calculation on Current X-arm mode Matching

    

       
            
 OldAndNewSetupPlotsOfDisplacementAndAngleAtTheETM.pngOldSetUpDisplacementAndNewSetup.m.zip 
  10290   Tue Jul 29 20:14:08 2014 AndresUpdate40m Xend Table upgradeXarm Green steering mirror upgrade Xarm Green Steering Mirror Upgrade
Nick
and I did the upgrade for the green steering
mirror today. 
  
  10291   Tue Jul 29 20:14:10 2014 KojiUpdate40m Xend Table upgradeXarm Green steering mirror upgradeThat
was super fast! Great job, Andres and Nic!
  
  10296   Wed Jul 30 10:16:54 2014 AndresUpdate40m Xend Table upgradeGreen Steering Mirror Upgrade completedGreen Steering Mirror Update
Yesterday,
Nick and I completed the green steering mirrors
upgrade. I attached the file that contained
 XarmUpgrade.pdfdWaistSize_dlensVsdWaistPosition_dlens.pngXarmNewOpticalSetup.PNG 
  2653   Wed Mar 3 18:32:25 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics** Please
add LISO file w/ component values.
 
 rfpd11_v2_TF.pdfrfpd11_v2_Noise.pdf 
  2655   Thu Mar 4 08:43:35 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics


   
        
            
 rfpd11_v2.fil 
  2656   Thu Mar 4 19:53:56 2010 AlbertoUpdate40m Upgrading11MHz PD designed adjusted for diode's resistance; 55 MHz RFPD designedAfter
reading this study done
 6x 
  2657   Thu Mar 4 22:07:21 2010 ranaUpdate40m Upgrading11MHz PD not yet designedUse 10 Ohms for the resistance - I have
never seen a diode with 25 Ohms.
p.s. PDFs can be joined together
  
  2704   Tue Mar 23 22:46:43 2010 AlbertoUpdate40m UpgradingREFL11 upgradedI modified REFL11 according to the changes
lsited in this
schematic (see wiki  / Upgrade 09
 2010-03-23_REFL11_model_to_meas_comparison.png 
  2711   Wed Mar 24 14:57:21 2010 AlbertoUpdate40m UpgradingREFL11 upgraded 
 Hartmut suggested a possible
explanation for the way the electronics transfer
  
  2715   Thu Mar 25 17:32:42 2010 AlbertoUpdate40m UpgradingREFL55 UpgradedI upgraded the old REFL199 to the new REFL55.
To do that I had to replace the old
photodiode inside, switching to a 2mm one.
 2010-03-25_REFL55_model_to_meas_comparison.png2010-03-25_REFL55_model_to_meas_comparison.png 
  2761   Sat Apr 3 19:54:19 2010 AlbertoUpdate40m UpgradingREFL11 and REFL55 PDs Noise SpectrumThese are the dark noise spectrum that
I measured on the 11MHz and 55MHz PD prototypes
I modified.
 2010-04-03_REFL11_darknoise.png2010-04-03_REFL55_darknoise.png 
  2767   Mon Apr 5 10:23:40 2010 AlbertoUpdate40m UpgradingREFL11 Low Frequency Oscilaltion ReducedAfter adding an inductor L=100uH and a
resistor R=10Ohm in parallel after the OP547A
opamp that provide the bias for the photodiode
 2010_04_05_REFL11_darknoise_with_100uH_coil_10ohm_res.png2010_04_05_REFL11_darknoise_wide_freq_window_lid_open-closed.png2010_04_05_REFL11_darknoise_wide_freq_window_lid_open-closed.png 
  2782   Thu Apr 8 10:17:52 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs PhotocurrentFrom the measurements of the 11 MHz RFPD
at 11Mhz I estimated a transimpedance of
about 750 Ohms. (See attached plot.)
 2010_04_05_REFL11_ShotnoiseVsPhotocurrent.png 
  2783   Thu Apr 8 10:24:33 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
  
  2784   Thu Apr 8 20:53:13 2010 KojiUpdate40m UpgradingREFL11 Noise Vs PhotocurrentSomething must be wrong. 
1. Physical Unit is wrong for the
second term of "Vn = Vdn + Sqrt(2 e
  
  2785   Fri Apr 9 06:45:28 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
  
  2789   Mon Apr 12 16:20:05 2010 AlbertoConfiguration40m UpgradingREFL55 improvedDuring the commissioning of the AS55
PD, I learned how to get a much better rejection
of the 11MHz modulation.
So I
 2010-04-12_REFL55_TF_model_to_meas_comparison.png 
  2790   Mon Apr 12 17:09:30 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
 2010-04-09_REFL11NoiseMeasurements.png 
  2795   Mon Apr 12 22:44:30 2010 KojiUpdate40m UpgradingREFL11 Noise Vs PhotocurrentData looks perfect ... but the fitting
was wrong.
Vn = Vdn + Z * sqrt( 2 e Idc )
  
  2882   Wed May 5 16:32:39 2010 AlbertoUpdate40m UpgradingNew REFL55 PD, 11MHz rejectionHere's the (calibrated) transimpedance
of the new REFL55 PD.
T(55.3) / T_(11.06) = 93 dB
 2010-05-05_REFL55_CalibratedOpticalResponse0-60MHz.png 
  2886   Thu May 6 16:18:37 2010 AlbertoUpdate40m UpgradingNew improved design for the 11MHz photodiodeAfter munching analytical models, simulations,
measurements of photodiodes I think I got
a better grasp of what we want from them,
 pox11.pdf 
  2893   Thu May 6 19:57:26 2010 AlbertoUpdate40m UpgradingNew improved design for the 11MHz photodiode


   
        
            
 pox11.pdf 
  2894   Fri May 7 11:21:49 2010 kojiUpdate40m UpgradingNew improved design for the 11MHz photodiodeHow much is the width?

  
  2896   Fri May 7 18:18:02 2010 AlbertoUpdate40m UpgradingNew improved design for the 11MHz photodiode


   
        
            
  
  2897   Fri May 7 19:02:27 2010 ranaUpdate40m UpgradingNew improved design for the 11MHz photodiodeTo measure the width of a resonance, the
standard method is to state the center frequency
and the Q. Use the definition of Q from the
  
  2902   Mon May 10 16:59:35 2010 AlbertoUpdate40m UpgradingUnexpected oscilaltionin the POY11 PDThe measured transimpedance of the latest
POY11 PD matches my model very well up to
100 MHz. But at about ~216MHz I have a resonance
 2010-05-10_POY11_CalibratedOpticalResponse0-500MHz.pngPOX11.png 
  2924   Wed May 12 17:10:16 2010 AlbertoUpdate40m UpgradingRF frequency generation box - step 0I started putting together the components
that are coint to go inside the frequency
generation box. Here's how it looked like:
 DSC_1499_small.JPG 
  2925   Wed May 12 23:31:17 2010 AlbertoUpdate40m Upgrading216 MHz resonance in the POY11 PD killedIt turned out that the resonance at 216
MHz in the 11MHz PD that I showed in the
elog entry 2902
 POX11.png2010-05-12_POY11_CalibratedOpticalResponse0-500MHz.png 
  2926   Thu May 13 05:06:43 2010 ranaUpdate40m Upgrading216 MHz resonance in the POY11 PD killed 
 This idea was tried before
by Dale in the ~1998 generation of PDs. Its
  
  2957   Thu May 20 12:34:46 2010 kiwamuConfiguration40m Upgradingoptical breadboards with legsYesterday Steve and I revived two legs
to mount some optical breadboards outside
of the end table.
 leg1_small.pngleg2_small.png 
  2966   Fri May 21 11:56:34 2010 AlbertoUpdate40m Upgrading40mUpgrade Field Power and RF Power Spectrum at the ports. 38m/38.55m arm length issue.I update my old 40mUpgrade Optickle model,
by adding the latest updates in the optical
layout (mirror distances, main optics transmissivities,
 7x 
  2994   Wed May 26 17:10:09 2010 AlbertoUpdate40m UpgradingRF Generation boxThis is how the RF generation box might
soon look like:
 Visio-frequencyGenerationBox_wiringSchematic.png 
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