40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 339 of 344  Not logged in ELOG logo
ID Date Author Type Categorydown Subject Text Attachments
  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 
  2996   Wed May 26 22:22:03 2010 AlbertoConfiguration40m UpgradingArm cavity lengthThe second sideband is resonant in the
arms for a cavity length of 37.9299m.
The nearest antiresonant arm lengths
 reflRFpowerVsArmLength_3658m.pngreflRFpowerVsArmLength_3750m.png 
  3001   Thu May 27 12:52:02 2010 AlbertoUpdate40m UpgradingArm lengths
For both sidebands to be antiresonant
in the arms, the first modulation frequency
  
  3012   Fri May 28 21:32:32 2010 AlbertoUpdate40m UpgradingMC alignment[Alberto, Kiwamu, Kevin, Rana]
Today we tried to measured the beam
shape after the MC MMT1 that Jenne installed
  
  3023   Tue Jun 1 06:30:38 2010 KojiConfiguration40m Upgradingeffect of the arm length I checked the effect of the arm length
to the reflectance of the f2(=5*f1) sidebands.
Conclusion: If we choose L_arm
 arm_cavity1.pngarm_cavity2.pngarm_cavity.nb.zip 
  3094   Mon Jun 21 18:01:34 2010 JenneUpdate40m UpgradingSRM, PRM hung, magnets inspected[Jenne, Kiwamu, Rana, Eric Gustafson]
The SRM and PRM have been re-hung,
and are ready for installation into the chambers. 
  
  3099   Tue Jun 22 20:07:08 2010 JenneUpdate40m UpgradingFirst attempt at Tip Tilt hanging[Jenne, Steve, Nancy, Gopal]
We
made an attempt at hanging some of the Tip
 2_ECDs_small.jpgMagnetStickingOutFar_small.jpg 
  3329   Fri Jul 30 02:54:04 2010 KojiUpdate40m UpgradingMore optics installed on the BS tableJuly 29 Thu [Steve, Alberto, Kiwamu,
Koji]
We
  
  3332   Fri Jul 30 12:46:38 2010 KojiConfiguration40m UpgradingBS chamber status   BS_layout_Jul_29_2010.png 
  4214   Thu Jan 27 21:10:47 2011 OsamuUpdate40m UpgradingCalibrated noise of greenI calibrated noise spectrum of green lock.
1. Measurement of conversion factor
of ADC input from V to ct:
 20110127_Calibrated_grrennoise.pdf20110127_Calibrated_grrennoise.jpg20110127_TF_ETMXSUSEXC_to_PZTOUT.pdf 
  5696   Wed Oct 19 12:25:58 2011 SureshUpdate40m UpgradingActive Tiptilts from LLO moved to clean shelf along X armI have moved the active tip tilts that
we brought over from LLO to the Clean Bureau
along the X arm (closest to the ETMX). There
  
  5697   Wed Oct 19 13:45:11 2011 SureshUpdate40m UpgradingActive Tiptilts from LLO moved to clean shelf along X armI have moved the active tip tilts that
we brought over from LLO to the Clean Bureau
along the X arm (closest to the ETMX). There
  
  7090   Mon Aug 6 11:07:06 2012 ManasaUpdate40m UpgradingOptical layout updatedACAD files of the 40m optical layout have
been updated as per the vent in Aug 2011.
Files are available at the 40m svn
  
  7125   Wed Aug 8 20:51:56 2012 ManasaUpdate40m UpgradingOptical layout updated

    

       
            
  
ELOG V3.1.3-