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ID Date Author Typeup Category Subject Text Attachments
  2688   Sat Mar 20 18:34:19 2010 kiwamuSummaryElectronicsRE:advantege of our triple resonant EOMYes, I found it.
Their advantage is that their circuit
is isolated at DC because of the input capacitor.
  
  2692   Mon Mar 22 02:03:57 2010 ranaSummaryElectronicsUPDH Box #17: ReadyIt took too long to get this box ready
for action. I implemented all of the changes
that I made on the previous one (#1437).
  
  2693   Mon Mar 22 10:07:30 2010 KojiSummaryElectronicsUPDH Box #17: ReadyFor your reference: Voltage noise of LM7815/LM7915
(with no load)
 15V_power_supply.pdf 
  2720   Sun Mar 28 20:05:33 2010 ranaSummaryPSLFSS Work from Sunday: AOM/VCO level set wrongJust before working on the FSS today, I
noticed that the VCO RF output level was
set incorrectly.
 Untitled.png 
  2721   Sun Mar 28 20:51:31 2010 ranaSummaryPSLFSS Work from Sunday: Cavity Suspension is Ridiculously Undamped!What
is the Transfer Function of the suspension
 Untitled.png 
  2722   Sun Mar 28 23:17:46 2010 ranaSummaryPSLFSS Work from Sunday: noise specThis is the error point spectrum - it is
filled with huge multiples of ~75 kHz as
Yoichi noticed a couple years ago.
 in2.png 
  2723   Sun Mar 28 23:47:47 2010 ranaSummaryPSLFSS Work from Sunday: Open Loop GainI measured the open loop gain of the FSS
(as usual, I have multiplied the whole OLG
by 10dB to account for the forward loop gain
 fssloop.pngsweep2.png 
  2724   Mon Mar 29 01:11:33 2010 ranaSummaryPSLFSS Work from Sunday: RF Out SpectrumI measured the RF spectrum coming out
the FSS RFPD to look for saturations - its
close to the hairy edge. This is with
 rfout.pngTEK00000.PNGTEK00001.PNGTEK00002.PNG 
  2726   Mon Mar 29 02:07:50 2010 KojiSummaryPSLFSS Work from Sunday: Open Loop Gain


   
        
            
  
  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
  
  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
  
  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 
  2793   Mon Apr 12 19:50:30 2010 AidanSummaryGreen LockingTemperature sweep of the Lightwave: df/dT = 2.8GHz/KThe beams from the Innolight and Lightwave
NPROs were both incident on a 1GHZ New Focus
PD. Mott and I swept the temperature of the
 LightWave_temp_sweep.pdfLightWave_Temp.m 
  2794   Mon Apr 12 20:48:51 2010 Aidan, MottSummaryGreen LockingTemperature sweep of the Innolight: df/dT ~ 3.3GHz/K

    
        
 Innolight_temp_sweep.pdfInnolight_Temp.m 
  2797   Tue Apr 13 12:39:51 2010 Aidan, MottSummaryGreen LockingTemperature sweep of the Innolight: df/dT ~ 3.3GHz/KPlease put those numbers onto wiki somewhere
at the green page or laser characterization
page.
  
  2814   Tue Apr 20 09:15:15 2010 steveSummarySAFETYannual safety audit   safa.PDF 
  2835   Fri Apr 23 18:30:49 2010 Aidan, Jenne, KojiSummaryGreen LockingGreen means GO!Jenne, Koji and I assembled the Covesion
Oven today, inserted a PPKTP crystal from
Raicol, aligned the crystal to a 50mW focus
 IMG_2405.jpgIMG_2417.jpg 
  2863   Sun May 2 13:04:51 2010 KojiSummarySUSCoil Actuator Balancing and Spot PositionI liked to know quantitatively where the
spot is on a mirror.

With an interferometer and A2L
 coil_balance.png 
  2865   Sun May 2 15:38:12 2010 ranaSummarySUSCoil Actuator Balancing and Spot Position 
Oh, but it gets even better: in order
to trust the A2L script in this regard you
  
  2866   Sun May 2 16:52:44 2010 KojiSummarySUSCoil Actuator Balancing and Spot PositionYes, of course. But so far I am trusting
that the coils are inheretly balanced.
Probably you are talking about the
  
  2891   Thu May 6 19:23:54 2010 FrankSummaryComputerssvn problemsi tried to commit something this afternoon
and got the following error message:
Command: Commit  
  
  2899   Sat May 8 02:38:08 2010 KojiSummaryIOOMC incident powerAs per Steve's request I checked the
MC incident power as a function of time.
The output is negative: the lower
 MC_input.png 
  2903   Mon May 10 17:47:16 2010 josephbSummaryCDSFinishedSo I finished writing a script which takes
an .ipc file (the one which defines channel
names and numbers for use with the RCG code
  
  2908   Mon May 10 20:33:29 2010 KojiSummaryCDSFinishedThis IPC stuff looks really a nice improvement
of CDS.
Please just maintain the wiki updated
  
  2928   Thu May 13 23:59:46 2010 ZachSummaryIOOMC table leveled After the recent removal of the old
IMMT and the relocation of the Faraday isolator,
the MC table was tilted a bit (southward
  
  2929   Fri May 14 03:30:45 2010 KojiSummaryIOOMC table leveledThanks Zach.This was a great job.
It was not mentioned but: was the
Faraday clamped down on the table?
  
  2931   Fri May 14 10:33:01 2010 ZachSummaryIOOMC table leveledAh... no, I didn't. That explains why there
were loose dogclamps on the table. I wrapped
them in foil and put them on the clean cart.
  
  2935   Sat May 15 04:13:33 2010 KojiSummaryIOOMC table leveledFixing at the next time is absolutely OK.

  
  2995   Wed May 26 18:54:55 2010 AidanSummaryGreen LockingMounted Crystal 724 in the Doubling OvenAndri and I mounted the Raicol Crystal
#724 in one of the new Covesion Ovens. The
procedure was the same as before - see
  
  3048   Thu Jun 3 22:33:31 2010 valeraSummaryCDSsimulated plant work I put matlab files and a summary
into the 40m wiki for the fitting of the
40m Optickle transfer functions and generating
  
  3052   Sun Jun 6 08:08:05 2010 rana, sanjitSummaryElectronicsCapacitor Bridge TestTo get a feel for the Capacitive Bridge
problems, we setup a simple bridge using
fixed (1 nF) caps on a breadboard. We used
 CapacitanceBridge.png 
  3061   Wed Jun 9 21:05:44 2010 ranaSummaryComputersop540m is not to be usedThis is a reminder (mainly for Steve, who somehow   
  3080   Wed Jun 16 11:31:19 2010 josephbSummaryComputersRemoved scaling fonts from medm on AllegraBecause it was driving me crazy while working
on the new medm screens for the simulated
plant, I went and removed the aliased font
  
  3091   Sun Jun 20 16:07:23 2010 KojiSummaryCOCCalibration of the metrology lab interferometerKiwamu and Koji
Summary
We have visited GariLynn's
 ring1_inner_centering.pdfring1_outer_centering.pdfSRMU01_pic.png 
  3102   Wed Jun 23 12:28:34 2010 RazibSummaryPhase CameraWeeekly SummaryThis past week I have completed the following
tasks:
 
 trigger-box_circuit.pngtest1.png 
  3106   Wed Jun 23 15:15:53 2010 josephbSummaryComputers40m computer security issue from last night and this morningThe following is not 100% accurate, but
represents my understanding of the events
currently.  I'm trying to get a full
  
  3125   Sat Jun 26 21:13:19 2010 ranaSummaryComputer Scripts / ProgramsCOMSOL 4.0 InstallationI've
installed COMSOL 4.0 for 32/64 bit Linux
in /cvs/cds/caltech/apps/linux64/COMSOL40/
It
  
  3127   Mon Jun 28 12:48:04 2010 josephbSummaryCDSCDS adapter board notesThe following is according to the drawing
by Ben Abbott found at http://www.ligo.caltech.edu/~babbott/40m_sus_wiring.pdf
This
applies to SUS:
  
  3129   Mon Jun 28 21:26:05 2010 ranaSummaryCDSCDS adapter board notesThose drawings are an OK start, but its
obvious that things have changed at the 40m
since 2002. We cannot rely on these drawings
  
  3163   Wed Jul 7 00:15:29 2010 tara,RanaSummaryPSLpower spectral density from RefCav transmitted beam I measured
the RC transmitted light signals here at
the 40m. I made all connections through
 RIN_rftrans.pngtara.png 
  3164   Wed Jul 7 10:42:29 2010 KojiSummaryPSLpower spectral density from RefCav transmitted beam How do you calibrate this to Hz/rtHz?

  
  3186   Fri Jul 9 11:41:58 2010 GopalSummaryOptic StacksTop Optic Layer Complete; Mechanical Tests Giving Problems



 7x 
  3189   Fri Jul 9 20:16:19 2010 ranaSummaryPSLThings I did to the PSL today: Refcav, PMC, cameras, etc.I re-aligned the beam into the PMC. I got
basically no improvement. So I instead changed
the .LOW setting so that PMCTRANS would no
  
  3190   Sun Jul 11 20:11:48 2010 ranaSummaryPSLRC trend after the insulation removal   rc.png 
  3196   Mon Jul 12 14:22:36 2010 JenneSummaryPSLThings I did to the PSL today: Refcav, PMC, cameras, etc.


   
        
            
  
  3210   Tue Jul 13 21:04:49 2010 tara,ranaSummaryPSLTransfer function of FSS servo I
measured FSS's open loop transfer function.
 TF_FSS_ser.png 
  3212   Wed Jul 14 01:05:27 2010 Sharmila,KatharineSummaryelogMaglevYesterday we hooked up the Quadrant Maglev
control to the power supply to test the components
in the Input/Output part of the circuit.
 P7120284.JPGP7120278.JPGP7120281.JPGP7140292.JPG 
  3217   Wed Jul 14 12:12:03 2010 RazibSummaryPhase CameraWeekly updateThis week I was mainly interested in investigating
the noise source at the phase camera. So
having this issue in mind, my activities
  
  3223   Wed Jul 14 19:15:26 2010 GopalSummaryOptic StacksREVISION: Eigenfrequency Analysis of Single Stack CompleteMy previous eigenfrequency analysis
was incorrect by two orders of magnitude
due to the misuse of Young's Modulus information
 Eigenfrequency_1_Stack4.pngEigenfrequency_2_Stack4.pngEigenfrequency_2_Stack4.pngEigenfrequency_3_Stack4.pngEigenfrequency_4_Stack4.png 
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