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ID Date Author Typeup Category Subject Text Attachments
  9717   Tue Mar 11 15:21:08 2014 KojiSummaryLSCComposite Error Signal for ARms (1)True. But we first want to realize this
for a single arm, then move onto the two
arms case. 
  
  9731   Mon Mar 17 12:02:55 2014 KojiSummaryGeneralIFO recovery / confirmed ETMX in troubleI
confirmed that we need to vent the chambers.
 MCspots.png 
  9733   Mon Mar 17 20:14:34 2014 KojiSummaryGeneralIFO recovery / confirmed ETMX in troubleI tried to take the photos of the magnets
from outside.  So far most suspicious was
LL. 
 ETMX_UL.JPGETMX_UR.JPGETMX_LR.JPGETMX_LL.JPG 
  9739   Tue Mar 18 21:19:22 2014 KojiSummaryIOOMC spot positions checkedMC spot sposition script was ran
/opt/rtcds/caltech/c1/scripts/ASS/MC/mcassMCdecenter
 MCASS.png 
  9740   Wed Mar 19 21:37:45 2014 manasaSummaryLSCAttempt to lock PRMIsb with REFL165I&QI tried to
repeat Koji's PRMI lock using REFL165I/Q.
I was not able to lock PRMI stably. All I
  
  9751   Wed Mar 26 11:16:59 2014 ericqSummaryLSCComposite Error Signal for ARms (3)Extending the previous model, I've closed
a rudimentary CESAR loop in simulink. Error
signals with varying noise levels are combined
 simlink.pdfsimulatedCESARLock.pdf 
  9753   Wed Mar 26 14:54:32 2014 KojiSummaryLSCPRMIsb locked with REFL165I&Q again[Manasa, Eric, Koji]
PRMIsb
was locked with REFL165I&Q.
  
  9754   Wed Mar 26 21:51:42 2014 ericqSummaryLSCPRMIsb locked with REFL165I&Q againIncidentally, while messing around with
transfer functions and sensing matrix elements
this evening, I was able to sideband lock
  
  9758   Fri Mar 28 17:22:55 2014 KojiSummaryLSCPRMIsb locked with REFL165I&Q againWhile I'm looking at the PRM ASC servo
model, I tried to use the current servo
filters for the ASC 
  
  9759   Fri Mar 28 20:23:02 2014 ranaSummaryIOOMC2 movedI aligned MC2 suspension by 0.01 in pit
and yaw to align the MC better to the PSL
beam. Then I turned the WFS back on. The
  
  9764   Mon Mar 31 11:34:00 2014 manasaSummaryIOOMC2 moved

    

       
            
  
  9765   Mon Mar 31 13:15:55 2014 manasaSummaryLSCAlignment update

    

       
            
  
  9767   Mon Mar 31 17:47:57 2014 ericqSummaryLSCMICH sensing oddities in REFL 3FLast week, while I had the PRMI locked
on REFL33, I did some poking around with
mirror excitation to RFPD quadrature transfer
 REFL_33_traj.pdfREFL_165_traj.pdf 
  9768   Mon Mar 31 21:23:30 2014 GabrieleSummaryLSCMICH sensing oddities in REFL 3F

    

       
            
  
  9769   Mon Mar 31 23:57:22 2014 KojiSummaryASCPRM ASC characterization / designA
series of measurements / calculations for
the PRM ASC characterization and servo design
 7x 
  9772   Tue Apr 1 21:45:01 2014 JenneSummaryLSCPRM violin notch not at correct freq?Koji and I have the PRMI locked right now,
and we hear a very strong violin mode ringing
up, at 628Hz.  This is, according to
  
  9773   Tue Apr 1 22:03:44 2014 KojiSummaryASCNew PRM ASC is running[Koji Jenne]
New PRM ASC was implemented. [to
be cnt'd]
  
  9777   Wed Apr 2 19:50:12 2014 KojiSummaryASCNew PRM ASC is runningAs the designed ASC filters in this
entry had too little phase margins (~10deg),
I had to compromise the servo design.
  
  9779   Wed Apr 2 23:08:51 2014 KojiSummaryASCNew PRM ASC is runningThe new PRM ASC design

Pitch
FM1: zero at 0Hz, pole at 2000Hz,
 PRM_QPD.pdfQPD_spe.pdf 
  9784   Thu Apr 3 18:55:10 2014 ericqSummaryLSCSome CARM related modeling The other day, Jenne and I were comparing
my MIST simulation to her Optickle simulation
for the CARM transfer functions I posted
 asIsPRCRes.pdfidealPRCRes.pdf3fPrclAnglesCarm.pdf 
  9785   Fri Apr 4 18:51:29 2014 ericqSummaryLSCMORE CARM related modelingIn today's ISC call, Kiwamu was comparing
two ways to approach resonance: 

    "C-Type": The
 9x 
  9794   Thu Apr 10 10:52:15 2014 manasaSummaryIOOMC2_TRANS path in WFS servo

    

       
            
  
  9837   Mon Apr 21 23:33:57 2014 ranaSummaryGreen LockingHP 8591E reads low by 140 Hz out of 10 MHzTo
check the basolute frequency stability of
the old monochrome HP 8591E RF Spectrum analyzer
  
  9857   Fri Apr 25 23:08:57 2014 ranaSummaryIOOMC2_TRANS QPD Servo re-re-engaged againWe turned on the MC2_TRANS paths for both
PIT/YAW tonight.
  
  9858   Sat Apr 26 13:19:59 2014 ericqSummaryIOOMC2_TRANS QPD Servo re-re-engaged again

    

       
            
  
  9869   Mon Apr 28 15:47:57 2014 manasaSummaryIOOMC2_TRANS QPD Servo trend

    

       
            
 MC_TRANSservoApr28.png 
  9871   Mon Apr 28 20:31:38 2014 ranaSummaryIOOMC2_TRANS QPD Servo trendThis is a 4-day trend. I don't see any
difference here which is significant. My
guess is that the MC_TRANS servo gain is
 Untitled.png 
  9886   Wed Apr 30 21:57:07 2014 ranaSummaryIOOMC2_TRANS QPD Servo now on for real   dolphin.pngMC2_QPD_trend.png 
  9925   Wed May 7 23:09:06 2014 rana, jamieSummaryComputer Scripts / ProgramsOttavia back on networkAfter Jamie fixed the third party repo
issue with Ottavia, he was able to upgrade
it to Ubuntu 12.04 Precise Pangolin. But
  
  9932   Thu May 8 17:00:56 2014 rana, QSummaryLSCREFL_DC handoff didn't work last nightLast
night after checking cabling and turning
on ISS, we tried several times to handoff
  
  9934   Fri May 9 01:36:28 2014 ranaSummarySUSOptical Lever QPD Sum trends: they're almost all too weak We want there to be ~16000 cts of
signal per quadrant on the optical levers.
I think that most of the QPDs have been modified
 OLtrend.png 
  9936   Fri May 9 04:51:13 2014 ericqSummaryLSCREFL_DC handoff didn't work last night

    

       
            
  
  9942   Mon May 12 22:42:19 2014 ranaSummarySUSOptical Lever QPD Sum trends: they're almost all too weakFor some reason or another, I decided that
we should see if the optical lever servos
were injecting too much noise into the test
 OL-FB.pngarms_140512.pdf 
  9943   Mon May 12 22:52:59 2014 JenneSummarySUSOptical Lever Filters are all differentWe need to go back and have a look at all
of our optical lever control filters, and
make sure they make sense. 
 OpLevFilters.pdf 
  9946   Tue May 13 13:27:58 2014 SteveSummarySUSOptical Lever Servos setting table

    

       
            
 OLsums.png 
  9947   Tue May 13 17:03:05 2014 SteveSummarySUSETMX oplev laser replaced

    

       
            
  
  9948   Tue May 13 17:31:32 2014 JenneSummarySUSETMX oplev laser replaced: New oplev gains setI took loop measurements of ETMX pit and
yaw, and set the upper UGF to be ~6Hz for
both.  This required a pitch gain of
 OLerr_13May2014.pdfOLfb_13May2014.pdf 
  9950   Tue May 13 22:55:57 2014 JenneSummarySUSETMX oplev: cleanupI believe that the Xend aux laser was turned
off earlier today, for Steve's work swapping
out the oplev.  When I went down there,
  
  9952   Wed May 14 10:04:06 2014 SteveSummarySUS oplev laser and temperature ETMX oplev qpd gain has to be increased.
 
 TempRules.png 
  9973   Tue May 20 09:12:25 2014 SteveSummarySUSETMX oplev qpd board

    

       
            
 ETMXOLQPD121.jpgETMXOLQPDface121.jpgETMXolSUM.png 
  9975   Tue May 20 15:54:39 2014 ranaSummarySUSETMX oplev qpd board This QPD circuit (D980325-C1 )
uses the nice OP497 Quad FET opamp as the
transimpedance amplifier. It has a low enough
  
  10009   Mon Jun 9 10:55:48 2014 NichinSummaryElectronicsBBPD D1002969-v8 transimpedence measurementMy SURF
week-1 work...
 PD_transimpedence_measurement.pngresults.pdfcode_and_data.zip 
  10012   Mon Jun 9 16:55:31 2014 KojiSummaryElectronicsBBPD D1002969-v8 transimpedence measurementHow is the modulation depth assumed in
the calculation?
If you don't know the modulation
  
  10042   Mon Jun 16 12:58:50 2014 manasaSummaryIOORingdown recap A recap of the ringdown measurements made
at the 40m in mid 2012, the hardware that
was installed for the same and results from
 Ringdown_815.pdfMCringdown_cum.pdfcum_plot.png 
  10043   Mon Jun 16 15:32:12 2014 ranaSummaryIOORingdown recap  
To do this better:
1) Just step the analog input
  
  10097   Wed Jun 25 02:01:21 2014 NichinSummaryGeneralWeekly Report Attached is the weekly work plan / equipment requirement
/ lab expert's presence needed for
 Nichin_Week4_update.pdf 
  10193   Mon Jul 14 13:03:23 2014 AkhilSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedMain
Problem:
The frequency counter (FC) takes
 0.2timinganalysis.png0.3timinganalysis.png0.5timinganalysis.png1stiminganalysis.pngpdf.zip 
  10194   Mon Jul 14 14:28:27 2014 KojiSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedLooks good. Now you have the internal timer
to verify the external clock. 
If you can realize the constant rate
  
  10199   Tue Jul 15 01:31:13 2014 AkhilSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedThe attached are the PSD plots with improved
FC timing(with the same code as in http://nodus.ligo.caltech.edu:8080/40m/10151).
More plots(Phase and PSD) to follow.
 qnoise.pngqnoise.pdf 
  10209   Wed Jul 16 01:18:02 2014 ranaSummaryLSCPython Wavelet peak finding for dramatic ALS - Red Resonance finding speedupNew script called scripts/ALS/findRedResonance.py
finds the IR resonance in less than 20 seconds.

    Do a ~2 FSR scan of the
 findRedResonance.pdf 
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