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ID Date Author Typeup Category Subject Text Attachments
  7064   Wed Aug 1 10:38:11 2012 EricSummaryGeneralSURF UpdateSince my last update I have modified the DARM control
loop model to the extent that it resembles
 OLG_hendries.pngLength_response_hendries.png 
  7065   Wed Aug 1 10:45:38 2012 SashaSummarySimulationsSURF - Week 6 - SummaryThis week, I worked on transferring my
Simulink
simulation to the RCG
  
  7066   Wed Aug 1 11:46:16 2012 MashaSummaryGeneralWeek Summary A lot of my time this week was spent
struggling with implementing my neural network
code in Simulink in order to experiment with
 control.png20-100-100-Perform.png1-50-0.7.png 
  7068   Wed Aug 1 11:54:59 2012 YaakovSummarySTACISGeophone calibration and open loop gainsThis week I've looked into finding an accurate
sensitivity for the geophones in the STACIS.
I found that when placing a geophone and
 08011201.pdf 
  7078   Thu Aug 2 11:09:52 2012 EricSummaryLSCFree-Swinging Michelson MeasurementsTo take the free swinging Michelson measurements
for the interferometer calibration Jamie
aligned the beam splitter with ITMX and ITMY.
 free_swing_MICH.png 
  7116   Wed Aug 8 11:16:06 2012 SashaSummarySimulationsSURF - Week 7 - SummaryThis week, I brought my c1lsp model online
and fixed up some the
 Screen_Shot_2012-08-06_at_9.20.02_PM.pngScreen_Shot_2012-08-08_at_11.13.55_AM.pngScreen_Shot_2012-08-08_at_11.08.23_AM.png 
  7117   Wed Aug 8 11:46:09 2012 MashaSummaryGeneralWeek SummaryThe main thing that I did this week was
write a C
block that, given static weights,
  
  7118   Wed Aug 8 11:47:52 2012 YaakovSummarySTACISWeekly summaryAs Rana pointed out (http://nodus.ligo.caltech.edu:8080/40m/7112),
the geophone/accelerometer noise lines from
my last eLog (http://nodus.ligo.caltech.edu:8080/40m/7109)
 budget_with_adc.pngbudget_with_adc.figpower_diagram.png 
  7119   Wed Aug 8 13:16:58 2012 EricSummaryGeneralSURF Update

  
  7128   Thu Aug 9 00:14:02 2012 EricSummaryLockingYARM Locking and CalibrationToday I spent time locking the YARM
in order to calibrate the arm cavity. Here's
 cal_swept_sine3_tfmagcal_swept_sine3_tfphcal_swept_sine3_cohsensing_func_model.png 
  7130   Thu Aug 9 00:35:53 2012 JenneSummaryLockingYARM Locking and Calibration

    

       
            
  
  7134   Thu Aug 9 10:09:32 2012 EricSummaryLockingYARM Locking and Calibration

    

       
            
 cal_swept_sine3_magnitude.pdfcal_swept_sine3_phase.pdfcal_swept_sine3_coherence.pdf 
  7139   Fri Aug 10 09:51:51 2012 EricSummaryLockingYARM Locking and MeasurementsI forgot to post this last night, but I
locked the YARM again yesterday and misaligned
the other optics. I took measurements on
  
  7145   Fri Aug 10 16:39:44 2012 EricSummaryLockingMichelson LockingI'm working on locking the Michelson now
in order to put an excitation on one of the
  
  7149   Fri Aug 10 19:49:11 2012 EricSummaryLockingMichelson Locking Procedure and Measurements

  
  7164   Mon Aug 13 19:29:10 2012 ManasaSummary Ringdown measurementsI tried to make ringdown measurements at
the IMC using the DC falling edge as the
trigger. Input to the MC was switched off
  
  7170   Tue Aug 14 04:37:06 2012 YoichiSummaryLSCXARM Open Loop GainYoichi, Rana
Here is the open loop gain of the
XARM loop.
 xarm-opltf.png 
  7171   Tue Aug 14 04:53:45 2012 YoichiSummaryLSCX-Arm noise spectrumYoichi, Rana
Here is the noise spectrum of the
X-arm error signal along with the TRX DC
 xarm-spectrum.png 
  7187   Wed Aug 15 04:03:55 2012 ranaSummaryLSCY-Arm Locking0) Did a bunch of alignment to get beams
roughly centered on ETMY and ITMY and maximize
power. Adjusted the aperture and focus on
 yArmNoise_120815.pngyarm.pdf 
  7190   Wed Aug 15 11:40:15 2012 YaakovSummarySTACISWeekly Summary This week I've been focusing mainly on
two things: 1) Designing a port for the STACIS
that will allow external actuation and/or
  
  7191   Wed Aug 15 11:44:35 2012 jamieSummaryLSCntp installed on all workstations

    

       
            
  
  7192   Wed Aug 15 13:23:34 2012 LizSummaryComputer Scripts / ProgramsLast Weekly UpdateOver the past week I have been continuing
to finalize
  
  7195   Wed Aug 15 16:29:59 2012 Eric SummaryGeneralSURF UpdateThis week I took more data for the calibration
of YARM. The summary of measurements
  
  7203   Thu Aug 16 13:04:36 2012 LizSummaryComputer Scripts / ProgramsDaily Summary DetailsI just wrote a short description of
  
  7211   Fri Aug 17 00:16:30 2012 EricSummaryLSCYARM CalibrationI modified my Simulink model of the YARM
to match the new filter modules Rana installed
on YARM. I also scaled the open loop transfer
 olg_model_meas.pnglength_response_model.pngyarm_uncal_power_spec.pdfyarm_cal_power_spec.pdf 
  7213   Fri Aug 17 04:54:01 2012 Yoichi, KojiSummaryLSCPRMI Locking To taste the strangeness of the current
40m PRC, I locked the PRMI with the guide
of Koji.
 AS_1029238601.jpgPOP_1029238616.jpgREFL_1029238629.jpgPRMI-OPLG.png 
  7224   Sat Aug 18 03:55:12 2012 YoichiSummaryLSCX-arm locking againTonight, I worked on the X-arm locking
again. I did not have any significant progress,
but observed several issues and will give
 MC_Trans.png 
  7238   Tue Aug 21 00:02:05 2012 ranaSummaryComputer Scripts / ProgramsGDS/DTT bug: 10 digit GPS times not accepted I've noticed that we're experiencing this
bug which was previously seen at
  
  7239   Tue Aug 21 00:35:25 2012 ranaSummaryIOOVisibilities and ChromeMC and PMC vis:  Untitled.pdf 
  7249   Wed Aug 22 15:47:34 2012 jamieSummaryGeneralvent prepartion for fast-track ventWe are discussing venting first thing next
week, with the goal of
diagnosing what's going on in the
  
  7259   Thu Aug 23 17:17:49 2012 MashaSummaryComputersCode Folder StatusI cleaned up my directory (/users/masha)
today. A lot of the files are just code that
I experimented with, but the important files
  
  7271   Fri Aug 24 14:46:08 2012 JenneSummaryGeneralDetailed alignment planFriday / pre-vent:
[done]
Align the MC mirrors for the incident
  
  7435   Mon Sep 24 20:28:13 2012 ranaSummaryelogrestarted elog: was unresponsive    
  7558   Tue Oct 16 16:46:20 2012 Vent Czar and CzarinaSummaryGeneralvent stuffWe're discussing the plan for the next
vent.  Now that we have all the tip-tilt
stuff in hand, we should get ready for the
  
  7560   Tue Oct 16 17:13:23 2012 CzarinaSummaryGeneralvent stuff - 4 pathsI see 4+
possible paths for us to take, in terms of
a possible vent in the next few weeks:
  
  7703   Tue Nov 13 08:34:11 2012 SteveSummaryVACpumpdown after 24days at atmosphere 
 
 pd74d1.png24datm.pngpdd1.png 
  7742   Mon Nov 26 10:06:51 2012 ranaSummaryIOOMC slides from 2002   MCtalk.pdf 
  7844   Mon Dec 17 21:41:30 2012 ranaSummarySUSBeCu wireJust in case we want to retrofit   
  7845   Mon Dec 17 22:42:27 2012 KojiSummaryGeneralThe projector lamp ended its life?i just heard a rather large exploding sound
in the control room.
I tried to locate the source and found
  
  7846   Mon Dec 17 22:49:33 2012 ManasaSummaryGeneralThe projector lamp ended its life?

    

       
            
  
  7847   Tue Dec 18 00:45:19 2012 KojiSummaryGeneralThe projector lamp ended its life?...Nah.   
  7860   Wed Dec 19 21:35:33 2012 KojiSummaryGeneralFirst Contact Training with Margot[Koji, Steve]
First
Contact Training with Margot
  
  7885   Wed Jan 9 13:34:34 2013 KojiSummaryGeneralThe projector lamp ended its life?[Koji, Manasa]
- A new projector lamp installed.
- The old lamp lasted 8751 "equivalent
  
  7904   Wed Jan 16 10:57:37 2013 taraSummaryIOONoise budget for MCI calculated thermal noise in mode cleaner
(MC) mirrors and compared it with the measured
MC noise. Thermal noise won't be a significant
 mc_nb_TN.pngmc_nb_TN.pngmc_nb_TN.figMC_nb.m.zipmc_nb_TN_2013_01_18.png 
  7908   Wed Jan 16 19:08:51 2013 KojiSummaryIOONoise budget for MCI missed the point. 
Do you mean that we can measure the coating
  
  7911   Thu Jan 17 01:27:54 2013 Tara(?)SummaryIOONoise budget for MC

    

       
            
  
  7979   Thu Jan 31 22:14:11 2013 ranaSummaryASCOptics lit Gouy not Guoy:
http://www.rp-photonics.com/gouy_phase_shift.html
pronounced Goo-eee, with the emphasis
  
  7982   Fri Feb 1 12:22:27 2013 ZachSummaryASCOptics litIt's OK; even Siegman got it wrong---48
times.
RA: NO, stil not OK.
  
  7989   Sun Feb 3 13:20:02 2013 KojiSummaryGeneralHypothesisRana mentioned the possibility that the
PR2 curvature makes the impact on the mode
stability. Entry
 mode_density_PRC.pdfmode_density_PRC.zip 
  7990   Mon Feb 4 10:45:51 2013 JamieSummaryGeneralrough analysis of aligned PRM-PR2 mode scanHere's a sort of rough analysis of the
aligned PRM-PR2 cavity mode scan.
On Friday we took some mode scan
 scan-labeled.pdf 
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