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ID Dateup Author Type Category Subject Text Attachments
  2725   Mon Mar 29 01:45:26 2010 daisukeConfigurationGeneralPeriscope version B for green laser ...Here the design of the periscope for the
90 deg steering version is posted.
straight version http://nodus.ligo.caltech.edu:8080/40m/2709
 40m_periscope_B.png40m_periscope_B_100329.pdf40m_periscope_B_dwg_100329.zip 
  2726   Mon Mar 29 02:07:50 2010 KojiSummaryPSLFSS Work from Sunday: Open Loop Gain


   
        
            
  
  2727   Mon Mar 29 10:40:59 2010 josephbUpdateCamerasGigE camera no work from screen

    
        
  
  2728   Mon Mar 29 15:19:33 2010 mevansUpdateGreen Lockingfrequency discriminator for green PLLThanks for the great entry! 
In order to make this work for higher
frequencies, I would add  Hartmut's suggestion
  
  2729   Mon Mar 29 15:26:47 2010 MottHowToComputersNew script for controlling the AG4395AI just put a script in the /cvs/cds/caltech/scripts/general/netgpibdata/
directory to control the network analyzer
called AG4395A_Run.py .   A section
  
  2730   Mon Mar 29 18:41:34 2010 KojiConfigurationSUSStarted to build TTsSteve and Koji
WE started to build 5 TTs. 4 of them
are used in the recycling cavities. One is
 IMG_2348.jpg 
  2731   Mon Mar 29 18:50:14 2010 KojiUpdateSUSPRM sidemagnet gluedPRM was released from the fixuture without
any trouble. This was the last magnet gluing
until ETMs are delivered.
 StatusTable.png 
  2732   Mon Mar 29 21:43:27 2010 AlbertoConfigurationPSLReference Cavity PD Noise Spectrum[Rana, Alberto]
This evening we measured the noise
spectrum of the reference cavity PD used
 2010-03-29_FSS_PD_shotnoise_and_darknoise.png2010-03-29_FSS_PD_shotnoise_and_darknoise.png 
  2733   Tue Mar 30 06:37:32 2010 ranaConfigurationPSLReference Cavity PD Noise SpectrumSome more words about the RFAM: I noticed
that there was an excess RFAM by unlocking
the RC and just looking at the RF out with
 rc.png 
  2734   Tue Mar 30 11:16:05 2010 josephbHowToComputersezca update information (CDS SVN)I'd like to try installing an updated multi-threaded
ezca extension later this week, allowing
for 64-bit builds of GDS ezca tools, provided
  
  2735   Tue Mar 30 21:11:42 2010 kiwamuSummaryGreen Lockingconversion efficiency of PPKTPWith a
30mm PPKTP crystal the conversion efficiency
 efficiency_waist_edit.png 
  2736   Tue Mar 30 22:13:49 2010 KojiSummaryGreen Lockingconversion efficiency of PPKTPQuestion:
Why does the small spot size for
the case (A) have small efficiency as the
  
  2737   Wed Mar 31 02:57:48 2010 kiwamuUpdateGreen Lockingfrequency counter for green PLLRana
found that we had a frequency counter SR620
which might be helpful for lock acquisition
 FCnoise.png 
  2738   Wed Mar 31 03:45:49 2010 MottHowToComputersNew script for controlling the AG4395A 
I took data for the 2 NPRO PLL using
the script I wrote for the AG4395, but it
 noisy_spec.png 
  2739   Wed Mar 31 10:34:02 2010 josephbUpdateelogElog not responding this morningWhen I went to use the elog this morning,
it wasn't responding.  I killed the
process on nodus, and then restarted, per
  
  2740   Wed Mar 31 11:52:32 2010 kiwamuSummaryGreen LockingRe:conversion efficiency of PPKTPGood point. There is a trick 
to avoid a divergence.
Actually the radius of the cylindrical
  
  2741   Wed Mar 31 12:30:31 2010 ranaUpdateGreen Lockingfrequency counter for green PLLIts a good measurement - you should adjust
the input range of the 620 using the front
panel 'scale' buttons to see how the noise
  
  2742   Wed Mar 31 15:31:53 2010 steveUpdatePSLReference Cavity RF PD base upgraded


   
        
            
 brspdbs.JPG 
  2743   Wed Mar 31 16:31:44 2010 steveUpdatePEMGuralp interface box turned off

    
        
 grlpntrfcbxoff.jpg 
  2744   Wed Mar 31 16:55:05 2010 josephbUpdateComputers2 computers from Alex and Rolf brought to 40mI went over to Downs today and was able
to secure two 8 core machines, along with
mounting rails.  These are very thin
  
  2745   Wed Mar 31 19:29:58 2010 HartmutUpdateElectronics(1cm-) Si PD transfer functions updateRecorded transfer functions for the 1cm
Si-PD as described on p. 2708
for different biases. I put the plots
  
  2746   Thu Apr 1 00:43:33 2010 MottUpdateGeneralPZT response for the innolightKiwamu and I measure the PZT response of
the Innolight this evening from 24 kHz to
2MHz.  
 Innolight_Bode.png 
  2747   Thu Apr 1 07:17:15 2010 KojiUpdateGeneralPZT response for the innolightThe shape of the TF looks nice but the
calibration must be wrong.
Suppose 1/f slope with 10^-4 rad/V
  
  2748   Thu Apr 1 10:21:58 2010 MottUpdateGeneralPZT response for the innolight


   
        
            
 Innolight_Response.pngLightwave_response.png 
  2749   Thu Apr 1 10:47:48 2010 KojiUpdateGeneralPZT response for the innolightInnolight: 100rad/V @ 100kHz  =>
1e7/f rad/V => 10MHz/V
LWE: 500rad/V @ 100kHz => 
  
  2750   Thu Apr 1 12:07:22 2010 ranaUpdateGeneralPZT response for the innolightThe Lightwave NPRO   
  2751   Thu Apr 1 15:21:12 2010 ranaUpdateGreen Lockingfrequency counter for green PLL 
  
  2752   Thu Apr 1 16:34:29 2010 HartmutUpdateGreen LockingSilicon PDsjust a few infos on Silicon PDs I looked
up.
If you want to go beyond the 100MHz
  
  2753   Thu Apr 1 17:35:24 2010 KojiUpdateSUSWorking on ITMX/YSteve and Koji
- We removed old ITMX/Y from the
chambers. Now they are temporarily placed
 IMG_2353.jpg 
  2754   Thu Apr 1 18:05:29 2010 MottUpdateGeneralPZT response for the innolight 
 We realized that we had measured
the wrong calibration value; we were using
 Innolight_Response_calFix.pngLightwave_response_calFix.png 
  2755   Thu Apr 1 18:44:40 2010 KojiUpdateGeneralPZT response for the innolightInnolight 10 rad/V @ 100kHz => 1e6/f
rad/V => 1MHz/V
LWE 30 rad/V @ 100kHz => 3e6/f
  
  2756   Thu Apr 1 19:59:32 2010 MottUpdateGeneralPZT response for the innolight 
 We measured the Amplitude Modulation
response of the PZTs, to find regions with
 Innolight_AM_Response.pngInnolight_AM_PM.pngInnoVsLW_PM.pngInnolight_AM_Response.pngLightwave_AM_PM.png 
  2757   Thu Apr 1 20:29:02 2010 HartmutUpdateGreen Lockingsimple PD test circuitI made a simple PD test circuit which may
allow to test PD response up to few 100MHz.
Its not for low noise, only for characterising
 pdtest.png 
  2758   Fri Apr 2 08:52:21 2010 AlbertoUpdateelogelog restartedi just restarted the elog for the third
time in the past 12 hours.
I checked the elog.log file to debug
  
  2759   Sat Apr 3 11:35:47 2010 ranaConfigurationPSLReference Cavity PD Noise SpectrumThe units on this
plot are completely bogus - we know that
the thermal noise from the resonant part
  
  2760   Sat Apr 3 16:07:40 2010 AlbertoConfigurationPSLReference Cavity PD Noise Spectrum I was aware of a problem on those
units since I acquired the data. Then it
wasn't totally clear to me which were the
 2010-03-29_FSS_PD_shotnoise_and_darknoise.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 
  2762   Sun Apr 4 00:21:42 2010 rana, kojiSummaryElectronicsCheckout of EG&G (PARC) preamp model #113, s/n 49135We tested out the functionality of the
EG&G 113 preamp that I found in one of
the cabinets. This is one of the ancestors
 IMG_0628.JPG 
  2763   Sun Apr 4 17:32:07 2010 AlbertoMetaphysicsGeneralnew y-arm?


   
        
            
  
  2764   Mon Apr 5 01:02:07 2010 ranaUpdatePEMGuralp interface box turned offI was
checking into the Guralp situation today.
I put the rubber balls underneath the granite
 Untitled.png 
  2765   Mon Apr 5 08:43:48 2010 steveUpdatePEMearthquake mag 7.2Large
earthquake shakes Baja California, Mexico
and 6 over Magnitude 5 aftershakes follow. 
 eq7.2.jpg 
  2766   Mon Apr 5 09:48:57 2010 KojiUpdateSUSITMs placed on the tables in the chambersSteve and Koji (Friday, Apr 02)
Summary
Intsallation of ITMs are going on.
  
  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 
  2768   Mon Apr 5 10:33:12 2010 AlbertoOmnistructureElectronicssoldering iron brokenThis morning the pencil soldering iron
of our Weller WD2000M Soldering Station suddenly
stopped working and got cold after I turned
  
  2769   Mon Apr 5 11:39:41 2010 steveUpdateSUSITM-south installation


   
        
            
  
  2770   Mon Apr 5 13:07:36 2010 JenneOmnistructureElectronicssoldering iron broken


   
        
            
  
  2771   Mon Apr 5 13:20:16 2010 KojiOmnistructureElectronicssoldering iron brokenAlbeto and Koji
We took the tip replacement from
the blue tower.
 weller_tips.jpg 
  2772   Mon Apr 5 13:52:45 2010 AlbertoUpdateComputersFront-ends down. RebootedThis morning, at about 12 Koji found all
the front-ends down.
At 1:45pm rebooted ISCEX, ISCEY,
  
  2773   Mon Apr 5 14:10:06 2010 steveUpdateSUSsus damping restored

    
        
  
  2775   Tue Apr 6 11:27:11 2010 AlbertoUpdateComputer Scripts / ProgramsData formats in the Agilent AG4395a Spectrum AnalyzerLately I've been trying to sort out the
problem of the discrepancy that I noticed
between the values read on the spectrum analyzer's
  
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