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ID Dateup Author Type Category Subject Text Attachments
  2523   Mon Jan 18 23:44:19 2010 kiwamuUpdateElectronicstriple resonant circuit for EOMThe first
design of the triple resonant EOM circuit
 whole_circuit.pngdesigned_circuit.png 
  2524   Tue Jan 19 00:10:44 2010 ranaUpdateElectronicstriple resonant circuit for EOMVery cool.     
  2525   Tue Jan 19 02:39:57 2010 kiwamuUpdateElectronicsdesign complete --- triple resonant circuit for EOM ---The design
of the triple resonant circuit has been fixed.
 realistic.pngscaling.png 
  2526   Tue Jan 19 02:40:38 2010 KojiUpdateElectronicstriple resonant circuit for EOMThe design looks very good. I have some
questions.
1. As far as I remember, you've
  
  2527   Tue Jan 19 03:04:14 2010 KojiUpdateElectronicstriple resonant circuit for EOMSelf-follow:
I got the answer of Q3 from the follow-up
entry.
  
  2528   Tue Jan 19 03:20:28 2010 KojiUpdateElectronicsdesign complete --- triple resonant circuit for EOM ---First I was confused, but now I think I
understood.
My confusion: 
  
  2529   Tue Jan 19 03:27:47 2010 kiwamuUpdateElectronicsRe: triple resonant circuit for EOM1. You are right, the gain for the
single resonant circuit was about 9.3 in
my measurement.
  
  2530   Tue Jan 19 10:30:29 2010 josephbUpdateComputersBoot fest to restart the computer and c1iscey not responding.

    
        
  
  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.
  
  2533   Tue Jan 19 23:26:07 2010 kiwamuUpdateElectronicsRe:Re: triple resonant circuit for EOM


   
        
            
 matching_edit.pngeq1.pngdesigned_response.png 
  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 
  2535   Thu Jan 21 10:09:27 2010 KojiSummaryIOOPhotos of the optical tablesI made a wiki page dedicated for the photos
of the optical tables.
The current layouts were uploaded.
  
  2536   Thu Jan 21 10:31:13 2010 KojiUpdateABSLSome preliminary results from measuring PRC's transmissivity for an amplitude modulated beamNice
and interesting plot.
  
  2538   Thu Jan 21 11:08:30 2010 kiwamu, steveUpdateVACDry Pump replacement This morning I and Steve replaced 
the dry fore pump of TP3, which is located
under the y-arm.
 DSCN0428.JPG 
  2539   Thu Jan 21 15:16:16 2010 josephb, kojiSummaryComputersMegatron used to lock Y armWe
succeeded in having a stable single arm (Y)
lock using Megatron to replace c1iscey.
Now
  
  2540   Thu Jan 21 17:23:30 2010 josephb,alex,kojiHowToComputersRCG code fixesIn order to see the Contec DO-32L-PE
Digital output PCIe card with the new
controls, we had to add the CDO32 part to
 CDO32.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
  
  2542   Fri Jan 22 12:33:37 2010 josephb, alexUpdateComputersModified CDS_PARTS for Binary outputTurns out the CDSO32 part (representing
the Contec BO-32L-PE binary output) rquires
two inputs. One for the first 16 bits, and
  
  2543   Fri Jan 22 14:40:49 2010 AlbertoUpdateABSLOvernight measurement

    
        
 2010-01-21_PRCtransmissivityVsModel.png 
  2544   Mon Jan 25 11:42:24 2010 josephbUpdateComputersMegatron and BO boardI was talking with Vladimir on Friday discussing
the Binary Output board, we looked at the
manual for it (Contec DO-32L-PE) and we realized
  
  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
  
  2548   Tue Jan 26 19:51:44 2010 Sanjit, ranaUpdateAdaptive FilteringOAF detailsWe turned on the OAF again to make sure
it works. We got it to work well with the
Ranger as well as the Guralp channels. The
 C1ASS_TOP.pngC1SUS_SRM_XYCOM1.pngUntitled.png 
  2549   Tue Jan 26 20:18:32 2010 ranaConfigurationALARMop540m: alarms and BLRMS and StripTool restoredI turned the StripTool and ALARMS and BLRMS
back on on op540m. Looks like it has been
rebooted 5 days ago and no one turned these
  
  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

    
        
  
  2555   Mon Feb 1 18:31:00 2010 SanjitUpdateAdaptive FilteringOAF details  I tried downsampling value
32 (instead of 16), to see if it has any
effect on OAF. Last week I encountered some
  
  2556   Mon Feb 1 18:33:10 2010 steveUpdateMOPAVe half the lazer!The 2W
NPRO from Valera arrived today and I haf
 inno2w.JPGinno2Wb.JPG 
  2557   Mon Feb 1 21:51:12 2010 SanjitUpdateAdaptive FilteringOAF details I tried some combination of PEM
channels and filters to improve OAF performance
at other frequencies, where we do not have
  
  2558   Tue Feb 2 10:38:30 2010 josephbUpdateComputersMegatron BO testLast night, I connected megatron's BO board
to the analog dewhitening board.  However,
I was unable to lock the y arm (although
  
  2559   Tue Feb 2 13:14:09 2010 KojiHowToIOOAnatomy of New Focus Resonant EOMJoe let me use the resonant EOM for GigE
phase camera for a while.
Then, I immediately started to open
  
  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
  
  2561   Tue Feb 2 16:10:09 2010 steveUpdatePEMconstruction progress next doorCES construction is progressing. The 40m
suspensions are bearing well.
atm1, PEM  vs sus plots of 120
 pem120d.jpg02022010.JPG02022010b.JPG02022010c.JPGicewall.JPG 
  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
  
  2563   Tue Feb 2 22:39:12 2010 JenneUpdatePSLIFO isn't playing nice tonight[Jenne, Kiwamu]
It's been an iffy last few hours
here at the 40m.  Kiwamu, Koji and I
  
  2564   Wed Feb 3 01:17:19 2010 KojiUpdatePSLIFO isn't playing nice tonightI checked the situation from my home
and the problem was solved. 
  
  2565   Wed Feb 3 07:57:01 2010 steveUpdatePSLPMC transmission is lowThe low PMC transmission alarm was on this
morning. The PMC alignment needs a touch
up.
 pmct40d.jpg 
  2566   Wed Feb 3 09:01:42 2010 robUpdateloreIFO isn't playing nice tonight


   
        
            
  
  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.
  
  2568   Wed Feb 3 11:13:15 2010 steveConfigurationGeneralplaned power outage for Sat. Feb 20The electrical shop has to connect the
new power transformer at CES. This means
we will have no AC power for ~8 hrs on Saturday,
  
  2569   Thu Feb 4 00:59:52 2010 ranaUpdateelogelog restarted I restarted the ELOG on NODUS just
now. Our attempt to set up error logging
worked - it turns out ELOG was choking
  
  2570   Thu Feb 4 12:29:04 2010 josephbUpdateComputersMartian IP switch over notesWhat is the change:
We will be
moving the 131.215.113.XXX ip addresses of
the martian network over to a 192.168.XXX.YYY
  
  2571   Fri Feb 5 00:52:55 2010 SanjitUpdateAdaptive FilteringOAF at 0.1-1.0 Hz 
At 0.1-1.0Hz, there is some coherence
between MC_L and RANGER_Y & GUR_Y, see
 OAF_04FEB2010_noOAF.pngOAF_04FEB2010.png 
  2572   Fri Feb 5 01:04:58 2010 SanjitUpdateAdaptive FilteringOAF at > 5Hz 
There is lot of coherence between
the error signal and PEM channels at 5-100Hz.
 OAF_04FEB2010_highFreq.png 
  2573   Fri Feb 5 11:01:49 2010 steveConfigurationVACslow pumpdown valve I have installed a slow start throttle
valve in front of V3  This spring loaded
valve will cut down on the flow at high pressures.
 slow.JPG 
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