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ID Date Authorup Type Category Subject Text Attachments
  2491   Sat Jan 9 09:47:03 2010 AlbertoUpdateLSCProblems trying to lock the armsThis morning I've been having problems
in trying to lock the X arm.
The X arm's filter FM6 in the LSC
  
  2492   Sat Jan 9 11:07:30 2010 AlbertoUpdateLSCProblems trying to lock the arms

    
        
  
  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
  
  2496   Sun Jan 10 16:05:51 2010 AlbertoOmnistructureEnvironmentLab Thermostats Temperature Lowered by 1 deg FRana noticed that recently the temperature
inside the lab has been a little bit too
high. That might be causing some 'unease'
  
  2500   Mon Jan 11 09:18:44 2010 AlbertoUpdateGeneralMeasurement runningI'm working on the AbsL experiment. A measurement
which involved the PRC locked is running
at the moment.
  
  2501   Mon Jan 11 10:01:06 2010 AlbertoOmnistructureEnvironmentLab Thermostats Temperature Lowered by 1 deg F

    
        
  
  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.
  
  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
  
  2512   Wed Jan 13 12:01:06 2010 AlbertoUpdateComputersc1dcuepics, c1lsc rebooted this morningSince last night the alignemtn scripts
couldn't work.
c1lsc wasn't working
properly because attempts to lock the X arm
  
  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.
  
  2519   Sun Jan 17 19:18:55 2010 AlbertoUpdateComputersBoot fest to restart the computer and c1iscey not responding.Thi afternoon I found that the RFM network
in trouble. The frontends sync counters had
railed to 16384 counts and some of the computers
  
  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 
  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

    
        
  
  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 
  2551   Thu Jan 28 09:14:51 2010 AlbertoConfigurationComputersc1iscey, c1iscex, c1lsc, c1asc rebootedThis morning the LSC scripts wheren't running
properly. I had to reboot c1iscey, c1iscex,
c1lsc, c1asc .
  
  2552   Thu Jan 28 09:17:32 2010 AlbertoUpdateLSC166 Modulation turned offI temporarily turned off the 166 modulation.   
  2553   Fri Jan 29 12:06:58 2010 AlbertoUpdateABSLMeasurement running today at lunch timeI just started a measuremtn that will be
running for the next hour or so. Please be
careful with the interferometer.
  
  2554   Fri Jan 29 13:14:49 2010 AlbertoUpdateABSLMeasurement running today at lunch time

    
        
  
  2560   Tue Feb 2 15:30:03 2010 AlbertoFrogsTreasureWild OatsFYI. Sitting on the top shelf of George
I found an opened jar of raspberry jam and
an opened jar of creamy peanut butter. Both
  
  2562   Tue Feb 2 18:15:47 2010 AlbertoUpdateelogElog restarted it Zach made me notice that the elog
had crashed earlier on this afternoon. 
I just restarted it with the restarting
  
  2567   Wed Feb 3 10:46:12 2010 AlbertoUpdateelogelog restarted Again, this morning Zach told me
that the elog had crashed while he was trying
to post an entry.
  
  2576   Mon Feb 8 14:13:03 2010 AlbertoUpdateABSLPLL CharacterizationLately I've been trying to improve the
PLL for the AbsL experiment so that it could
handle larger frequency steps and thus speed
 2010-02-08_Old_PDH_Box_Filter_TF_gain_knob_0_Boost_OFF.png2010-02-08_PLL_OLG_gain_knob_0_Boost_OFF.png2010-02-08_PLL_Noise_Budget.png 
  2577   Mon Feb 8 14:56:17 2010 AlbertoUpdateABSLSuddenly a much better alignment of PRCI just aligned PRM and locked PRC and I
noticed that SPOB is much higehr than it
used to be. It's now about 1800, vs 1200
  
  2579   Mon Feb 8 15:41:51 2010 AlbertoUpdateABSLSuddenly a much better alignment of PRC

    
        
  
  2581   Tue Feb 9 09:07:06 2010 AlbertoUpdateABSLPLL Characterization

    
        
 2010-02-08_PRCtransmissivity_EntireFreqRange_VsFit.png 
  2582   Tue Feb 9 10:10:58 2010 AlbertoUpdateABSLback to analogI want to try to do the measurement with
the network analyzer used as local oscillator,
instead of the Marconis that I'm using now.
  
  2604   Tue Feb 16 09:51:22 2010 AlbertoUpdateGreen Lockingtake some optics away from the ETM end table


   
        
            
  
  2605   Tue Feb 16 10:01:16 2010 AlbertoConfigurationLSCArms and PRC not lockingSince last Friday either the arms or the
PRC can't lock.
The montors show the beam flashing
  
  2608   Tue Feb 16 15:25:00 2010 AlbertoConfigurationLSCArms and PRC not locking 
 
 shock.jpg 
  2640   Thu Feb 25 15:49:05 2010 AlbertoAoGCDSNew IO Chassis for the new CDSYesterday Kiwamu and I went to Downs
to take all the available parts of the IO
chassis that Gary and I had put together
  
  2653   Wed Mar 3 18:32:25 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics** Please
add LISO file w/ component values.
 
 rfpd11_v2_TF.pdfrfpd11_v2_Noise.pdf 
  2655   Thu Mar 4 08:43:35 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics


   
        
            
 rfpd11_v2.fil 
  2656   Thu Mar 4 19:53:56 2010 AlbertoUpdate40m Upgrading11MHz PD designed adjusted for diode's resistance; 55 MHz RFPD designedAfter
reading this study done
 6x 
  2680   Thu Mar 18 12:27:56 2010 AlbertoUpdateABSLPLL reconstructed


   
        
            
  
  2702   Tue Mar 23 15:38:26 2010 AlbertoUpdateelogelog just restarted I found the elog down and I restarted it.
Then, after few seconds it was down
again. Maybe someone else was messing with
  
  2704   Tue Mar 23 22:46:43 2010 AlbertoUpdate40m UpgradingREFL11 upgradedI modified REFL11 according to the changes
lsited in this
schematic (see wiki  / Upgrade 09
 2010-03-23_REFL11_model_to_meas_comparison.png 
  2710   Wed Mar 24 14:52:02 2010 AlbertoUpdateGreen Lockingtwo NPRO PLL


   
        
            
  
  2711   Wed Mar 24 14:57:21 2010 AlbertoUpdate40m UpgradingREFL11 upgraded 
 Hartmut suggested a possible
explanation for the way the electronics transfer
  
  2715   Thu Mar 25 17:32:42 2010 AlbertoUpdate40m UpgradingREFL55 UpgradedI upgraded the old REFL199 to the new REFL55.
To do that I had to replace the old
photodiode inside, switching to a 2mm one.
 2010-03-25_REFL55_model_to_meas_comparison.png2010-03-25_REFL55_model_to_meas_comparison.png 
  2732   Mon Mar 29 21:43:27 2010 AlbertoConfigurationPSLReference Cavity PD Noise Spectrum[Rana, Alberto]
This evening we measured the noise
spectrum of the reference cavity PD used
 2010-03-29_FSS_PD_shotnoise_and_darknoise.png2010-03-29_FSS_PD_shotnoise_and_darknoise.png 
  2758   Fri Apr 2 08:52:21 2010 AlbertoUpdateelogelog restartedi just restarted the elog for the third
time in the past 12 hours.
I checked the elog.log file to debug
  
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