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ID Date Author Type Categorydown Subject Text Attachments
  14863   Fri Sep 6 16:38:24 2019 aaronUpdateALARMAlarm noise from smart-ups machine under workstation?There was an alarm sound from the Smart-UPS
2200 sitting under the workstation. I see
that the 'replace battery' light
  
  2053   Mon Oct 5 14:37:29 2009 AlbertoUpdateABSLAbsolute Length Meaasurement NPRO is onIn the revival of the experiement length
measurement for the recycling cavities, I
turned the auxiliary NPRO back on. The shutter
  
  2209   Mon Nov 9 11:14:57 2009 AlbertoUpdateABSLStarted working on the PSL tableI'm working on the PSL table to set up
the PLL setup for the AbsL experiment.
  
  2211   Mon Nov 9 13:17:07 2009 AlbertoConfigurationABSLNPRO onI turned the auxialiary NPRO for the AbsL
Experiment on. Its shutter stays closed.
  
  2229   Tue Nov 10 19:19:57 2009 AlbertoUpdateABSLRotated polarizer on the PSL table, along the MC input pick off beam Aligning the beam for the PLL of the AbsL
Experiement I rotated the polarizer along
the path of the MC Input pick off beam (=
  
  2230   Tue Nov 10 19:21:53 2009 AlbertoUpdateABSLPLL AlignmentI've been trying to lock the PLL for the
AbsL Experiment but I can't see the beat
(between the auxiliary NPRO and the PSL).
  
  2238   Wed Nov 11 15:04:52 2009 AlbertoUpdateABSLWorking on the AP tableI've opened the AP table and I'm working
on it.
  
  2239   Wed Nov 11 16:18:57 2009 AlbertoUpdateABSLWorking on the AP table


   
        
            
  
  2240   Wed Nov 11 17:10:51 2009 JenneUpdateABSLWorking on the AP table

    
        
  
  2241   Wed Nov 11 17:33:54 2009 KojiUpdateABSLWorking on the AP tableYes it did.
For long time, the crystal temperature
C1:PSL-126MOPA_LTMP was 43~46deg. Now
  
  2250   Thu Nov 12 10:45:36 2009 AlbertoUpdateABSLWorking on the AP tableI've opened the AP table and I'm working
on it.
Also auxiliary NPRO turned on and
  
  2252   Thu Nov 12 11:34:38 2009 AlbertoUpdateABSLWorking on the AP table


   
        
            
  
  2254   Thu Nov 12 12:51:45 2009 AlbertoUpdateABSLWorking on the AP table

    
        
  
  2257   Thu Nov 12 16:53:59 2009 AlbertoUpdateABSLWorking on the AP table


   
        
            
  
  2261   Thu Nov 12 18:10:27 2009 AlbertoUpdateABSLPLL LockedI locked the PLL and made some first measuremtns
of the spectrum of the error signal. I'll
post them later.
  
  2321   Tue Nov 24 14:33:22 2009 AlbertoUpdateABSLworking on the AP tableI'm working on the AP table. I also opened
the auxiliary NPRO shutter. The auxiliary
beam is on its path on the AP table and PSL
  
  2324   Tue Nov 24 19:16:02 2009 AlbertoUpdateABSLworking on the AP table


   
        
            
  
  2326   Wed Nov 25 08:43:08 2009 AlbertoUpdateABSLWorking on the AP tableI'm working on the AP table. I also opened
the auxiliary NPRO shutter. The auxiliary
beam is on its path on the AP table and PSL
  
  2328   Wed Nov 25 10:20:47 2009 AlbertoUpdateABSLAbsL PLL not able to lockLast night something happened on the
beat between the PSL beam and the auxiliary
NPRO beam, that spoiled the quality of the
  
  2329   Wed Nov 25 11:02:54 2009 AlbertoUpdateABSLAbsL PLL not able to lock

    
        
  
  2334   Wed Nov 25 15:42:27 2009 AlbertoUpdateABSLWorking on the AP table


   
        
            
  
  2337   Wed Nov 25 20:14:58 2009 AlbertoUpdateABSLAbsL PLL not able to lock: problem fixed

    
        
  
  2338   Wed Nov 25 20:24:49 2009 AlbertoUpdateABSLPLL Open Loop Gain MeasuredI measured the open loop gain of the PLL
in the AbsL experiment.
I repeated the measurement twice:
 2009-09-25_OLgain_g3png.png2009-09-25_OLgain_g6png.png 
  2339   Wed Nov 25 20:28:17 2009 AlbertoUpdateABSLStopped working on the AbsLI closed the shutter of the NPRO for the
night.
  
  2342   Fri Nov 27 02:25:26 2009 ranaUpdateABSLPLL Open Loop Gain Measured


   
        
            
  
  2420   Tue Dec 15 21:39:34 2009 AlbertoUpdateABSLbrief summary of this afternoon's measurementsI took measurements of the open loop
gain of the AbsL PLL with the old Universal
PDH Box.
I Also measured the
  
  2421   Wed Dec 16 11:21:20 2009 AlbertoUpdateABSLUniversal PDH Box Servo FiltersYesterday I measured the shape of the
servo filter of both the old and the new
Universal PDH boxes.
Here they
 NewandOlfFilterTF.pngNewandOlfFilterTF.png 
  2422   Wed Dec 16 11:46:25 2009 AlbertoUpdateABSLAbsl PLL Open Loop GainYesterday I measured the Open Loop Gain
of the PLL in the absolute length experiment.
The servo I used was that of the old Universal
 OldBoxOLTF.png 
  2423   Wed Dec 16 11:55:47 2009 ranaUpdateABSLUniversal PDH Box Servo Filters 
 To me, they both look stable.
I guess that the phase has to go to -180
  
  2460   Mon Dec 28 15:34:14 2009 AlbertoUpdateABSLWorking on the AP tableI opened the auxiliary laser's shutter.
I'm currently working on the AP table.
  
  2461   Mon Dec 28 18:35:27 2009 AlbertoUpdateABSLWorking on the AP table


   
        
            
  
  2493   Sat Jan 9 15:02:01 2010 AlbertoUpdateABSLPRC scanningI scanned the PRC in the frequency range
of 30-60 MHz, untill the PLL lost lock. But
everything is working fine.
The
  
  2502   Mon Jan 11 11:06:53 2010 AlbertoUpdateABSLMeasurement running


   
        
            
  
  2504   Mon Jan 11 16:59:14 2010 AlbertoUpdateABSLInterferometer BusyI'm currently running a measurement on
the PRC.
Please don't interfere with the IFO
  
  2505   Mon Jan 11 19:36:13 2010 AlbertoUpdateABSLMeasurement runningLeaving for dinner. Back in ~1hr.
I left a measurement running. Please
don't interfere with it till I'm back. Thanks.
  
  2506   Mon Jan 11 21:49:17 2010 JenneUpdateABSLMeasurement running

    
        
  
  2508   Tue Jan 12 09:37:05 2010 AlbertoUpdateABSLIFO availableI finished measuring the AbsL for this
morning. The IFO is again available.
Please don't mess up with the
  
  2513   Wed Jan 13 12:03:00 2010 AlbertoUpdateABSLMeasurement now running. Please be carefulAt the moment I'm running a measurement
on the PRC and I'm planning to leave it going
for the time we'll be at the 40m meeting.
  
  2521   Mon Jan 18 18:34:01 2010 AlbertoUpdateABSLMeasurement in progressI started a long measurement of the PRC's
transmissivity. I'm leaving the lab and I'm
going to be back at about 8 tonight. Please
  
  2522   Mon Jan 18 20:58:40 2010 AlbertoUpdateABSLMeasurement in progress

    
        
  
  2531   Tue Jan 19 12:54:39 2010 AlbertoUpdateABSLMeasurement in progressA measurement will be running for the next
hour. Please be careful.
  
  2532   Tue Jan 19 16:21:18 2010 AlbertoUpdateABSLWatchdogs not working and then fixedThis afternoon the watchdogs stopped working:
they didn't trip when the suspension positions
crossed the threshold values.
  
  2534   Wed Jan 20 20:11:56 2010 AlbertoUpdateABSLSome preliminary results from measuring PRC's transmissivity for an amplitude modulated beamHere I'm posting a plot showing a
set of measurements that I made in the past
few days to determine the absolute length
 2010-01-19_PRCtransmissivityVsModel.png 
  2536   Thu Jan 21 10:31:13 2010 KojiUpdateABSLSome preliminary results from measuring PRC's transmissivity for an amplitude modulated beamNice
and interesting plot.
  
  2541   Fri Jan 22 02:54:06 2010 AlbertoUpdateABSLOvernight measurementI'm leaving a measurement running overnight.
It should be done in about one hour.
Tomorrow morning, If you need to
  
  2543   Fri Jan 22 14:40:49 2010 AlbertoUpdateABSLOvernight measurement

    
        
 2010-01-21_PRCtransmissivityVsModel.png 
  2545   Mon Jan 25 16:30:37 2010 AlbertoUpdateABSL166 MHz sideband turned offI turned off the modulation at 166MHZ
becasue I don't need it if I'm only locking
the PRC.
  
  2546   Mon Jan 25 16:46:33 2010 AlbertoUpdateABSL166 MHz sideband turned off

    
        
  
  2547   Tue Jan 26 03:28:56 2010 ranaUpdateABSL166 MHz sideband turned off 
 You can turn the 166 off if
you want. MZ is unhappy after its turned
  
  2550   Wed Jan 27 11:02:30 2010 AlbertoUpdateABSLPRC Cavity Length I fitted the data from scanning
the PRC by changing the beat frequency of
the auxiliary laser beam with the PSL beam.
The
 2010-01-21_PRCtransmissivityVsFit.png2010-01-21_PRCtransmissivity_EntireFreqRange_VsFit.png 
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