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ID Date Author Type Categorydown Subject Text Attachments
  5064   Sat Jul 30 00:33:33 2011 KojiUpdatePSLABSL Laser crystal temp left largely excited & left unattended for more than 3hoursI
found that the ref cav trans CCD view was
blinking with 30-50 fringe amplitudes. This
  
  5065   Sat Jul 30 02:47:43 2011 ranaUpdatePSLABSL Laser crystal temp left largely excited & left unattended for more than 3hours Hmm. Should have only been +/- 1
GHz. Some setting got changed apparently...
This is a part of the RefCav temperature
  
  5069   Sat Jul 30 10:01:35 2011 JennyUpdatePSLPSL table work I've been working on the PSL table to put
together a setup so that I can measure the
reference cavity's response to a temperature
 modematchpic.pngmodematchinfo.pngLIGO_block_diagram.pngLIGO_block_diagram.pngmodematch_setup_pic.png 
  5071   Sat Jul 30 19:06:25 2011 ryan, ranaUpdatePSLReturn of the PSL temperature box


   
        
            
 rctempbox.png 
  5072   Sat Jul 30 20:41:50 2011 ranaUpdatePSLRefCav Stabilization back on   Untitled.png 
  5075   Sun Jul 31 00:37:57 2011 kiwamuUpdatePSLRe : PSL table work I think you made a simple mistake in your
diagram -- the mixer must be replaced by
  
  5096   Tue Aug 2 17:40:04 2011 JennyUpdatePSLReducing beam intensity incident on photodiodeI am using a PDA255 photodiode to measure
the power outputted by the NPRO beam on the
PSL table. (I'm going to then use a network
  
  5114   Thu Aug 4 00:04:52 2011 JennyUpdatePSLNetwork analyzer and PD set up to measure amplitude response of PZTToday I placed the PDA255 photodiode on
the PSL table to catch the small amount of
beam power reflected by the second polarizing
  
  5126   Fri Aug 5 18:29:35 2011 JennyUpdatePSLNetwork analyzer and PD set up to measure amplitude response of PZT

    

       
            
  
  5144   Mon Aug 8 20:23:14 2011 JennyUpdatePSLNetwork analyzer and PD set up to measure amplitude response of PZT

    

       
            
  
  5149   Tue Aug 9 02:34:26 2011 JennyUpdatePSLPZT transfer function measurementUsing a PDA255 on the PSL table, I measured
the amplitude response of the NPRO PZT, sweeping
from 10kHz to 5 MHz.
  
  5156   Tue Aug 9 16:00:58 2011 JennyUpdatePSLAmplitude response of PZT   AMresponsePZT.pngAMresponsePZT.png 
  5165   Wed Aug 10 02:40:40 2011 JennyUpdatePSLDither freq for PZT chosen: 2.418 MHzI've finished using the network analyzer
to characterize find a dither frequency for
driving the PZT to use in my PDH locking.
  
  5179   Wed Aug 10 20:40:17 2011 JennyUpdatePSLPDH locking: got an error signalI ended up choosing a different dither
frequency for driving the NPRO PZT: 230 kHz,
because the phase modulation response in
  
  5202   Fri Aug 12 03:49:45 2011 JennySummaryPSLNPRO PDH-Locked to Ref Cav
 LIGO_block_diagram_2.pngopenlooperror.jpgIMG_3034.JPGclosedlooperror.jpg 
  5217   Fri Aug 12 20:33:57 2011 DmassSummaryPSLNPRO PDH-Locked to Ref CavTo aid Jenny's valiant attempt to finish
her SURF project, I did some things with
the front end system over the last couple
 TMP_INT_TF.pdf 
  5228   Sun Aug 14 04:12:37 2011 JennyUpdatePSLTemperature steps and slow actuator railingBelow are some plots from dataviewer of
temperature-step data taken over the past
32 hours. (They show minute trends). I am
 Picture_6.pngPicture_7.png 
  5230   Sun Aug 14 15:37:39 2011 JennyUpdatePSLTemperature steps and slow actuator railing


   
        
            
  
  5271   Fri Aug 19 19:08:40 2011 JennyUpdatePSLRelocking NPRO to reference cavity. I am trying again to measure a temperature
step response on the reference cavity on
the PSL table.
  
  5272   Fri Aug 19 23:41:20 2011 JennyUpdatePSLRelocking NPRO to reference cavity.

    

       
            
  
  5274   Sat Aug 20 23:01:39 2011 JennyUpdatePSLTaking temperature step-response data: successes and tribulationsAfter finishing my last elog entry, I monitored
the digital loop's error signal (the control
signal for the fast loop) and the output
 5hourwbigimpulse.jpg5hourwbigimpulse2.jpg23hoursbefore920pm.jpg23hoursbefore920pm2.jpg 
  5549   Mon Sep 26 17:49:51 2011 KojiUpdatePSLc1psl [Koji Suresh]
c1psl has got frozen during our ezcaread/write
business. 
  
  5551   Mon Sep 26 20:04:03 2011 KojiUpdatePSLMC lock has been recovered[Kiwamu Suresh Koji]
Some main parameters of the PSL has
been recovered using Dataviewer and some
 snapshot1.pngsnapshot2.pngsnapshot3.png 
  5564   Wed Sep 28 13:30:01 2011 JenneUpdatePSLPMC was unlockedRelocked the PMC.  MC came back immediately.   
  5606   Mon Oct 3 20:02:59 2011 SureshUpdatePSLAM / PM ratio[Koji, Suresh]
In the previous measurement, the
PDA 255 had most probably saturated at DC,
  
  5616   Tue Oct 4 16:58:45 2011 SureshUpdatePSLAM / PM ratioCorrection:        Koji noted that Mirko
actually reports a PM modulation index of
0.17 for the 11 MHz sideband (
  
  5644   Mon Oct 10 15:41:56 2011 KojiUpdatePSLPMC aligned[Koji Suresh]
The steering mirrors for PMC were
aligned. The transmission went up from 0.779
  
  5705   Wed Oct 19 18:16:53 2011 JenneUpdatePSLPMC found unlockedI just relocked the PMC.  I don't
know why it was unlocked.
  
  5707   Wed Oct 19 19:43:16 2011 JenneUpdatePSLPMC found unlocked

    
        
  
  5720   Fri Oct 21 10:32:14 2011 steveUpdatePSLPSL laser turned offIn order to move the emergency shut off
switch in room 103 I had to turn off the
2 W Innolight laser. This job will take an
  
  5721   Fri Oct 21 11:02:47 2011 steveUpdatePSLPSL laser turned ON


   
        
            
 laserofon.png 
  5897   Tue Nov 15 16:16:34 2011 steveUpdatePSLenclosure interlocks are working on all sliding doorsBen and Sam came over to fix one of 
the east side  sliding  door sensor
that had to be moved from the inside 
  
  5898   Tue Nov 15 16:25:38 2011 steveUpdatePSLIOO angle qpd centeredThis moring I centered the IOO Angle QPD.
The IOO Pos QPD was not centered. The existing
layout does not allow the beam centering
  
  5907   Wed Nov 16 10:11:20 2011 steveUpdatePSLIOO angle & pos qpd centered


   
        
            
 iooqpds.png 
  5912   Wed Nov 16 14:34:18 2011 steveUpdatePSLIOO beam moves in pitchC1:IOO-QPD_ANG_VERT beam movement 
in 1 degree C temp change in 3 hrs
 
 iooqpds.png 
  5922   Thu Nov 17 11:27:58 2011 JenneUpdatePSLHEPA turned downI was measuring things to see how big my
adapter plate needs to be, and I decided
that we'd had enough days of the HEPA being
  
  5931   Thu Nov 17 21:12:09 2011 KojiUpdatePSLHEPA setting changed[Koji, Suresh]
8:50PM HEPA@100% for the test
8:55PM HEPA@0%
  
  6000   Thu Nov 24 14:05:10 2011 KojiUpdatePSLHEPA@50%I left the HEPA at the 50% level @5AM,
Nov 24
  
  6107   Mon Dec 12 15:24:21 2011 JenneUpdatePSLPMC and MC were both crappy - now realignedPMC trans was only ~0.79, where it should
be ~0.84 something.  The MC was also
not stellar. 
  
  6153   Tue Dec 27 23:03:56 2011 kiwamuUpdatePSLPMC realignedI have realigned the steering mirrors for
PMC because the transmitted light had been
at ~ 0.741
  
  6160   Tue Jan 3 17:25:27 2012 KojiUpdatePSLFound the laser was offI found the PSL laser has been off for
four hours. Nobody seemed to know why.
I just turned it on and it is now
  
  6325   Mon Feb 27 18:33:11 2012 jamieUpdatePSLwhat to do with old PSL fast channelsIt appears that the old PSL fast channels
 never made it into the new DAQ system. 
We need to figure out what to do with them.
  
  6350   Mon Mar 5 03:22:54 2012 kiwamuUpdatePSLPMC realignedI realigned the steering mirrors for the
PMC. The trans value went up from 0.79 to
0.83.
  
  6514   Tue Apr 10 11:08:29 2012 taraUpdatePSLcurved mirror behind AOM removedWe removed the curved mirror behind the
AOM (ROC=0.3m) on PSL table. The mirror is
now in PSL lab. See PSL:905
  
  6569   Wed Apr 25 19:36:19 2012 DenUpdatePSLPMC aligned[Koji, Den]
We have aligned PMC,  the WFS
are
  
  6604   Sat May 5 01:24:07 2012 DenUpdatePSLPMCI was interested what whitening filter
do we have between MC servo and ADC. The
shape is in the figure below, SR provided
 whitening.jpgmcf_v.png 
  6605   Sat May 5 09:13:02 2012 KojiUpdatePSLPMCI suspect that it was just unlocked when
you had disconnected the cable.
There is not reflection now. It seems
  
  6606   Sat May 5 10:20:21 2012 DenUpdatePSLPMC

    

       
            
  
  6607   Sat May 5 12:23:38 2012 KojiUpdatePSLPMCNo matter how you connect/disconnect, touching
the laser may cause the PMC unlocked.
At
  
  6608   Sat May 5 20:42:59 2012 DenUpdatePSLPMC[Koji, Den]
Koji was right that I misaligned
everything during the alignment work. I assumed
  
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