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ID Date Author Typeup Category Subject Text Attachments
  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
  
  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 
  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 
  2769   Mon Apr 5 11:39:41 2010 steveUpdateSUSITM-south installation


   
        
            
  
  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
  
  2776   Tue Apr 6 16:55:28 2010 AlbertoUpdateComputer Scripts / ProgramsData formats in the Agilent AG4395a Spectrum Analyzer


   
        
            
  
  2777   Tue Apr 6 22:54:34 2010 KojiUpdateSUSITMY (south) alignedKiwamu and Koji
ITMY
(south) was aligned
 IMG_2362.jpg 
  2779   Wed Apr 7 10:48:04 2010 AlbertoUpdateElectronicsREFL11 Noise SimulationLISO simulations confirm the estimate
of ~15nV for the noise of REFL11.
The
largest contribution comes from the 50Ohm
 rfpd11_testinput_noiseplot.pdf 
  2780   Wed Apr 7 10:58:15 2010 KojiUpdateElectronicsREFL11 Noise SimulationWhat??? I don't see any gray trace
of Rs in the plot. What are you talking about?
Anyway, if you are true, the circuit
  
  2781   Wed Apr 7 11:11:19 2010 AlbertoUpdateElectronicsREFL11 Noise Simulation


   
        
            
 rfpd11_testinput_noiseplot.pdf 
  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


   
        
            
  
  2788   Mon Apr 12 14:20:10 2010 kiwamuUpdateGreen LockingPZT response for the innolightI measured a
jitter modulation caused by
  
  2790   Mon Apr 12 17:09:30 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
 2010-04-09_REFL11NoiseMeasurements.png 
  2791   Mon Apr 12 17:37:52 2010 josephbUpdateComputersY end simulated plant progressCurrently, the y end plant is yep.mdl. 
In order to compile it
 YEP.pngYEP_PLANT.png 
  2792   Mon Apr 12 17:48:32 2010 AidanUpdateComputer Scripts / Programselog restarted The elog crashed when I was uploading
a photo just now. I logged into nodus and
restarted it.
  
  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 )
  
  2796   Mon Apr 12 22:51:31 2010 KojiUpdateSUSITMX installed and alignedKoji
ITMX
was aligned
 IMG_2381.jpg 
  2798   Tue Apr 13 12:49:35 2010 josephbUpdateComputersY end simulated plant progress

    
        
  
  2799   Tue Apr 13 19:53:06 2010 MottUpdateGreen LockingPZT response for the innolight and lightwave 
 I redid the PZT Phase Modulation
measurement out to 5 MHz for both the Innolight
 6x 
  2800   Tue Apr 13 20:02:02 2010 KojiUpdateSUSBS chamber opened, PRM/SRM SOS removed from the tableBob, Steve, and Koji
We
opened North heavy door of the BS chamber
 IMG_2384.jpg 
  2801   Thu Apr 15 14:47:28 2010 steveUpdateElectronics25MHZ oscillation of HP4195AThe 1979 vintage RF spectrum analyzer HP4195A 
sn2904J01587 shipped out  for repair
today to http://www.avalontest.com
 P1060246.JPGP1060249.JPG 
  2802   Fri Apr 16 17:26:23 2010 JenneUpdatePEMGuralp Breakout Box pulledI
pulled the Guralp breakout box from the rack,
and it's sitting on the EE bench here. 
  
  2803   Fri Apr 16 17:46:54 2010 KojiUpdateVACPeeting mirrors alignedSteve and Koji
We aligned the peeping mirrors to
look at the surface of the ITMs. 
  
  2804   Sat Apr 17 18:30:12 2010 ZachUpdateGreen Locking1W NPRO output profileNOTE:
This measurement is wrong and
only remains for documentation purposes.
 profile_fit_4_17_10.png 
  2807   Mon Apr 19 11:31:04 2010 AidanUpdateGreen Locking1W NPRO output profile

    

       
            
  
  2809   Mon Apr 19 16:27:13 2010 AidanUpdateGreen LockingRaicol crystals arrived and we investigated themJenne, Koji and I opened up the package
from Raicol and examined the crystals under
the microscope. The results were mixed and
  
  2810   Mon Apr 19 16:31:42 2010 KevinUpdatePSLInnolight 2W LaserKoji and Kevin 
We unpacked the Innolight 2W laser,
took an inventory, and scanned the operations
  
  2811   Tue Apr 20 00:32:30 2010 JenneUpdatePEMGuralp Breakout Box put back


   
        
            
 Gur2X_before_20Apr2010.jpgGur2X_after_replace_100k_resistors_20Apr2010.jpg 
  2812   Tue Apr 20 07:48:42 2010 steveUpdatePSLion pump HV turned onWe found ref-cavity HV was off yesterday
afternoon. It was turned back on.
  
  2813   Tue Apr 20 08:00:52 2010 steveUpdateSUSETMY damping restoredETMY sus damping was restored   
  2816   Tue Apr 20 11:14:31 2010 AidanUpdateGreen LockingRaicol crystals arrived and we investigated them 
 Here
is Crystal 724 polished side 2 with all photos
  
  2817   Tue Apr 20 13:00:52 2010 ZachUpdateelogelog restarted I restarted the elog with the restart
script as it was down.
  
  2818   Tue Apr 20 13:02:14 2010 ZachUpdateGreen Locking1W NPRO output profileEDIT:
I used an IFIT (inverse fast idiot transform)
to change the x-axis of the plot from Hz
 profile_fit_4_19_10.png 
  2819   Tue Apr 20 13:37:36 2010 JenneUpdateGreen Locking1W NPRO output profile


   
        
            
  
  2820   Tue Apr 20 18:02:22 2010 JenneUpdateCOCNew SRM and PRM Hung[Jenne, Steve]
We removed the old SRM and PRM from
their cages, and are temporarily storing
  
  2821   Tue Apr 20 19:37:02 2010 KojiUpdateGreen Locking1W NPRO output profileBeautiful fitting.

  
  2822   Tue Apr 20 20:15:37 2010 KevinUpdatePSLInnolight 2W Output Power vs Injection CurrentKoji and Kevin measured the output power
vs injection current for the Innolight 2W
laser.
 PvsI_2W.jpg 
  2823   Wed Apr 21 10:09:23 2010 kiwamuUpdateGreen Lockingwaist positon of Gaussian beam in PPKTP crystalsTheoretically the waist position of
a Gaussian beam (1064) in our PPKTP crystal
differs by ~6.7 mm from that of the incident
 focal_positin_edit.png 
  2824   Wed Apr 21 11:32:31 2010 josephbUpdateCDS40m CDS hardware update and software requestsThis is mostly a reminder to myself about
what I discussed with Jay and Alex this morning.
The big black IO chassis are "almost"
  
  2825   Wed Apr 21 15:53:57 2010 JenneUpdatePEMSeismometers now on the granite slabThe 3 seismometers are now on the granite
slab.  The Ranger is now aligned with
the Xarm (perpendicular to the Mode Cleaner)
 P4210048.JPG 
  2826   Wed Apr 21 16:48:38 2010 josephbUpdateCDSHardware updateAlberto and myself went to downs and acquired
the 3rd 4x processor (Dual core, so 8x cores
total) computer.  We also retrieved
 irwin.jpg 
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