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ID Date Author Typeup Category Subject Text Attachments
  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 
  7991   Mon Feb 4 11:10:59 2013 KojiSummaryGeneralrough analysis of aligned PRM-PR2 mode scanThe expected finesse is 100ish. How much
can we beleive the measured number of 50?
From the number we need to assume
  
  7992   Mon Feb 4 15:06:56 2013 KojiSummaryGeneralHypothesis

    

       
            
  
  7994   Mon Feb 4 19:33:19 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scan[Jenne, Yuta]

We redid PRM-PR2 cavity scan because
 3peakdata.png 
  7995   Mon Feb 4 19:48:32 2013 JamieSummaryGeneralarbcav recalc of PRC with correct ITM transmissionI noticed that Koji used a high reflector
for the ITMs for his full PRC arbcav calculation.
 I just redo it here with the correct ITM
 mode_density_PRC_2.pdfmode_density_PRC_3.pdf 
  7996   Mon Feb 4 22:46:03 2013 JamieSummaryGeneralarbcav for SRC with curved TTsI ran Zach's arbcav on our SRC with curved
TTs and the situation looks much worse than the PRC.
 mode_density_SRC_3.pdfmode_density_SRC_2.pdf 
  7997   Tue Feb 5 02:04:44 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scanI redid PRM-PR2 cavity scan using oscilloscope
to avoid anti-aliasing effect.
Measured 
 PRMPR2scan.png 
  7998   Tue Feb 5 03:16:51 2013 KojiSummaryGeneralrough analysis of aligned PRM-PR2 mode scan0.764 and 0.751 do not give us the stdev
of 0.005.
I have never seen any Yokogawa in
  
  8000   Tue Feb 5 10:09:08 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scanstdev of [0.764, 0.751] is 0.007, but what
we need is the error of the averaged number.
Statistical error of the averaged number
  
  8002   Tue Feb 5 11:30:19 2013 KojiSummaryGeneralrough analysis of aligned PRM-PR2 mode scanMakes sense. I mixed up n and n-1
Probability function: X = (x1 + x2
+ ... + xn)/n, where xi = xavg +/- dx
  
  8005   Tue Feb 5 19:16:22 2013 JamieSummaryGeneralarbcav of PRC with +600 RoC PR2/3This is just a simple rerun of arbcav from
#7995
but with the PR2/3 RoCs set to 600, instead
 mode_density_PRC_3.pdfmode_density_PRC_2.pdf 
  8006   Tue Feb 5 19:32:47 2013 yutaSummaryGeneralPR2/PR3 flipping and PRC stabilityWe are considering of flipping PR2 and/or
PR3 to make PRMI stable because PR2/PR3 seems
to be convex.
 PRMI_PR2HR_PR3HR.pngPRMI_PR2AR_PR3HR.pngPRMI_PR2HR_PR3AR.pngPRMI_PR2AR_PR3AR.png 
  8012   Wed Feb 6 15:20:55 2013 yutaSummaryGeneralFWHM was wrongI have to blame Jamie for putting extra
2 randomly.
Measured PRM-PR2 cavity 
  
  8022   Thu Feb 7 12:56:18 2013 JamieSummaryGeneralPRC/arm mode matching calculationsNOTE:
There was a small bug in my initial calculation. 
The plots and numbers have been updated with
 8x 
  8025   Thu Feb 7 17:10:11 2013 KojiSummaryGeneralPRC/arm mode matching calculations

    

       
            
  
  8029   Fri Feb 8 00:23:33 2013 ranaSummaryGeneralPRC/arm mode matching calculations 
 I would guess that either flipping
PR2 or PR3 would give nearly the same effect
  
  8033   Fri Feb 8 11:07:07 2013 JamieSummaryGeneralPRC/arm mode matching calculations

    

       
            
  
  8035   Fri Feb 8 12:42:45 2013 nicolasSummaryGeneralPRC/arm mode matching calculations

    

       
            
  
  8040   Fri Feb 8 18:23:32 2013 JamieSummaryGeneralarbcav of half PRC with flipped PR2Arbcav with half PRC (flat temporary mirror
in front of BS), PR2 RoC = 600m, PR3 RoC
= -600m:
 prm23t-modes.pdfprm23t-geometry.pdf 
  8041   Fri Feb 8 19:29:44 2013 yutaSummaryGeneralarbcav of half PRC with flipped PR2We need expected finesse and g-factor to
compare with mode-scan measurement. Can you
give us the g-factor of the half-PRC and
  
  8048   Fri Feb 8 23:22:48 2013 DenSummaryModern Controlprogress report I wrote a small document on the application
of LQG method to a Fabry-Perot cavity control.
 LQG.pdf 
  8053   Sun Feb 10 18:00:13 2013 yutaSummaryLSCPR2-flipped half-PRC spectra/OLTFTo compare with future PRMI locking, I
measured spectra of POPDC and feedback signal.
I also measured openloop transfer function
 POPDCLSCPRM.pngLSCPRCLOLTF.png 
  8054   Mon Feb 11 12:49:54 2013 JenneSummaryLSCResonant freq change - why? (and passive TT mode freqs)

    

       
            
  
  8059   Mon Feb 11 17:17:30 2013 JamieSummaryGeneralmore analysis of half PRC with flipped PR2

    

       
            
 foo.pdf 
  8060   Mon Feb 11 17:54:02 2013 KojiSummaryOpticsCurvature radii of the G&H/LaserOptik mirrorsI, by chance, found  that my windows
partition has Vision32 installed.
So I run my usual curvature characterization
 TT_Mirrors_RoC.pdf 
  8068   Tue Feb 12 18:25:43 2013 JamieSummaryGeneralhalf PRC with astigmatic PR2/3

    

       
            
  
  8069   Tue Feb 12 18:28:46 2013 JamieSummaryOpticsCurvature radii of the G&H/LaserOptik mirrors

    

       
            
  
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