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ID Date Author Type Category Subject Text Attachments
  9804   Fri Apr 11 18:55:28 2014 manasaUpdateLSCarm length measurementsArm lengths were measured
using ALS
 Xarm.pngYarm.png40mCavLength.zip 
  9803   Fri Apr 11 16:04:31 2014 KojiUpdateLSCcongratulationIt's
just one of the stepping stones, but not
yet a mile stone.
  
  9802   Fri Apr 11 14:57:53 2014 steveUpdateLSCcongratulation 
 
 whenSheisHappy3h.pngmc4hArms3hrs.png 
  9801   Fri Apr 11 12:32:33 2014 ericqUpdateLSCCARM and DARM both on IR signals!!!!!!!!!

    

       
            
  
  9800   Fri Apr 11 12:21:27 2014 KojiUpdateLSCCARM and DARM both on IR signals!!!!!!!!!About the ADC range,
According to the elogs, DARM = AS55Q/400.
So in the current level, the error has +/-40cntpp
  
  9799   Fri Apr 11 11:58:24 2014 JenneUpdateLSCCARM and DARM both on IR signals!!!!!!!!! A few time series from last night's
data. 
300 seconds, starting from 1081240100,
 DARM_IN1_getsSmaller.pngDARM_CARM_TRX_TRY.pngCARMtransition_DARMtransition.pngDARMin_DARMout.pngCARM_DARM_in_out.png 
  9798   Fri Apr 11 10:30:48 2014 jamieUpdateLSCCARM and DARM both on IR signals!!!!!!!!!


   
        
            
  
  9797   Fri Apr 11 02:09:31 2014 JenneUpdateLSCCARM and DARM both on IR signals!!!!!!!!![EricQ, Jenne]
A few more details on our work for
the evening, of 
 IRlocks.pdf 
  9796   Fri Apr 11 01:02:07 2014 JenneUpdateLSCCARM and DARM both on IR signals!!!!!!!!![EricQ, Jenne]
We're still working, but I'm really
excited, so here's our news: 
 onlyIRspectra.pdf 
  9795   Thu Apr 10 16:09:29 2014 SteveUpdateVACRGA scan at 75% pumping speed

    

       
            
 520HzpumpingSpeed.png 
  9794   Thu Apr 10 10:52:15 2014 manasaSummaryIOOMC2_TRANS path in WFS servo

    

       
            
  
  9793   Thu Apr 10 01:56:05 2014 JenneUpdateLSCCARM transitioned to IR error signals![Jenne, EricQ]
This
 sqrtInvLock.pdf 
  9792   Wed Apr 9 16:08:33 2014 JenneUpdateLSCCARM loop gains vs. CARM offsetI have taken EricQ's simulation results
for the CARM plant change vs.  CARM offset,
and put that together with the CM and CARM
 8x 
  9791   Wed Apr 9 02:34:20 2014 JenneUpdateLSCJumping over the CARM resonance pointKoji was right, and I was using much too
large of a CARM offset. 
 TRX_TRY_QPDonly.pngLSC_error_signals.pngPRM_SUSangles.pngREFL1f_AS55.png 
  9790   Tue Apr 8 23:04:14 2014 manasaUpdateLSCarm length measurements

    

       
            
  
  9789   Tue Apr 8 19:10:39 2014 ranaUpdateLSCarm length measurements Since we don't have an arm length
precision measurement (i.e. better than centimeters),
why not just do as Koji suggests and use
  
  9788   Tue Apr 8 10:44:53 2014 KojiUpdateLSCPlaying with PRMI + 2 armsI vaguely remember that the ALS count (Phase
Tracker output) is converted to Hz@532nm
by a factor  ~20kHz/cnt.
  
  9787   Tue Apr 8 01:58:53 2014 JenneUpdateLSCPlaying with PRMI + 2 armsI played around with the PRMI + 2 arms
situation again this evening.  (I'm
not ready to call it "PRFPMI" until
  
  9786   Mon Apr 7 15:26:32 2014 jamie, ericqUpdateCDSaborted attempt to update c1sus machine with second CPUThis morning we attempted to replace the
c1sus front end machine with a spare that
had been given a second CPU, and therefore
 Screenshot-Untitled_Window.png 
  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 
  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 
  9783   Thu Apr 3 18:09:54 2014 ericqUpdateLSCAttempt at PRMI+2 armsSo, here's the basic: "We reduced
the CARM offset and saw more TRY" plot. 
 offsetTRY.pdf2dhist.pdfpdh_trans.pdf 
  9782   Thu Apr 3 17:05:52 2014 SteveUpdateVACMaglev controller swapped

    

       
            
 loanerControllerIn.png 
  9781   Thu Apr 3 03:06:34 2014 JenneUpdateLSCAttempt at PRMI+2 arms[EricQ, Jenne]
Much more success later! 
We've had the arms locked on ALS
  
  9780   Thu Apr 3 00:30:52 2014 JenneUpdateLSCAttempt at PRMI+2 arms[EricQ, Jenne]
We started out this evening by
locking the PRMI, on different REFL PDs,
  
  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 
  9778   Wed Apr 2 20:13:04 2014 JenneUpdatePEMMore Chile EQs2 more earthquakes in Chile:  a M6.4
and a M7.8. 
We got them about 15 minutes ago
  
  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.
  
  9776   Wed Apr 2 16:34:15 2014 SteveUpdateVACMaglev controller needs service

    

       
            
  
  9775   Wed Apr 2 09:31:22 2014 SteveUpdatePEMlocal 3.0M earthquake

    

       
            
 local3.0Meq.png8.2MegChili?.png 
  9774   Wed Apr 2 01:18:30 2014 JenneUpdateLSCAttempt at PRMI+2 armsI was trying to lock PRMI+2 arms, but I'm
losing patience with the MC losing lock. 
It's mostly well-behaved, but every now and
  
  9773   Tue Apr 1 22:03:44 2014 KojiSummaryASCNew PRM ASC is running[Koji Jenne]
New PRM ASC was implemented. [to
be cnt'd]
  
  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
  
  9771   Tue Apr 1 20:56:27 2014 JenneUpdatePEMNo noticeable effect from Chile's M8.2 earthquakeKoji locked the MC, arms, and PRMI, with
no troubles, after the M8.2 earthquake off
the coast of Chile, that happened about 4
  
  9770   Tue Apr 1 17:37:57 2014 EvanUpdateComputer Scripts / ProgramsComsol 4.4 upgradeComsol 4.4 is now installed under /cvs/cds/caltech/apps/linux64/COMSOL44.
 I've left the other installations alone.
  
  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 
  9768   Mon Mar 31 21:23:30 2014 GabrieleSummaryLSCMICH sensing oddities in REFL 3F

    

       
            
  
  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 
  9766   Mon Mar 31 13:26:23 2014 manasaUpdateLSCLSC model modifiedI have included Yarm CESAR to the LSC model.
It was just a copy paste of the Xarm CESAR.
Since we are now meditating about implementing
  
  9765   Mon Mar 31 13:15:55 2014 manasaSummaryLSCAlignment update

    

       
            
  
  9764   Mon Mar 31 11:34:00 2014 manasaSummaryIOOMC2 moved

    

       
            
  
  9763   Mon Mar 31 08:11:00 2014 SteveUpdateSUSrecovery from earthquakes

    

       
            
 local5.1eq.pngEQ4.4-5.1-3.3-16days.png 
  9762   Sat Mar 29 00:11:39 2014 KojiConfigurationGeneralNTP setting on nodusFB: /etc/ntp.conf was updated as
below such that it refers nodus and also
caltech server when nodus is not available
  
  9761   Fri Mar 28 23:28:13 2014 KojiConfigurationGeneralNTP setting on nodus[Koji Rana]
We are looking at NTP settings. I
looked at nodus.
  
  9760   Fri Mar 28 22:10:00 2014 rana, kojiUpdateSUSrecovery from * EQ Southeast of LA around 45 minutes
ago. Callum and I felt it.
 Screenshot.png 
  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
  
  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 
  
  9757   Fri Mar 28 16:26:20 2014 steveUpdateVACRGA scan after power failure

    

       
            
 afterPowerFailure.png 
  9756   Thu Mar 27 10:34:39 2014 ericqUpdateGeneralRecovery

    

       
            
  
  9755   Wed Mar 26 22:22:43 2014 ManasaUpdateGeneralRecoveryThe following
that went unnoticed from yesterday were recovered
today:
  
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