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  40m Log, Page 48 of 341  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  3830   Sat Oct 30 14:35:43 2010 KojiSummaryCDSCDS time delay measurementUnsatisfactory.
Neglecting the digital anti-imaging
 CDS_system_investigation_090323.pdf 
  3831   Sun Oct 31 00:19:35 2010 ranaSummaryComputer Scripts / ProgramsHP3563A netGPIB functionI've wheeled the old HP audio frequency
signal analyzer into the control room to
debug the GPIB/python interface. The wireless
  
  3838   Mon Nov 1 15:47:15 2010 yutaSummaryCDSCDS time delay measurementBackground:
  I measured CDS time delay last
week, but because of my lack of understanding
 downupsampling.pngCDSdelay2.png 
  3839   Mon Nov 1 16:43:24 2010 KojiSummaryCDSCDS time delay measurementUm, Beautiful.   
  3841   Mon Nov 1 19:32:08 2010 yutaSummaryCDSfb crashed? during c1ioo and c1mcs connection at ASCFrame builder
died again!!
  
  3849   Wed Nov 3 02:23:11 2010 yutaSummaryCDSchecking whitening filter boardSummary:
  Last night, I found that some
of the input channels have wrong hardware
 MC3SEN.png 
  3850   Wed Nov 3 02:37:39 2010 yutaSummaryGreen Lockingcoarse locked green beat frequency(Kiwamu, Yuta)

 Screenshot_LowFreqLock.png 
  3851   Wed Nov 3 03:00:47 2010 KojiSummaryGreen Lockingcoarse locked green beat frequencyWow! Great guys!!   
  3852   Wed Nov 3 09:32:00 2010 ranaSummaryCDSEurocard board swapping When swapping Eurocard boards, it
is safest to first turn down the power supplies
and then do the swapping. 
  
  3855   Wed Nov 3 17:01:01 2010 josephbSummaryCDSComparison of RFM read times Problem:
RFM reads are slow.  Rolf has
said it should take 2-3 microseconds per
  
  3869   Fri Nov 5 15:20:18 2010 josephb, alexSummaryCDS40m computer slow down solvedProblem:
The 40m computers were responding
sluggishly yesterday, to the point of being
  
  3872   Fri Nov 5 21:49:12 2010 ranaSummaryCDS40m computer slow down solved


   
        
            
  
  3875   Sat Nov 6 01:54:15 2010 FrankSummaryComputersvirus definition file update on laptop for dinocami took
some pictures with the dinocam this afternoon.
I used the laptop computer next to it using
  
  3876   Sat Nov 6 07:26:54 2010 yutaSummaryIOOreduced common mode displacement of the beam through MC1 to MC3(Koji, Suresh, Yuta)

Summary:
 A2LMCalign.png 
  3877   Sat Nov 6 16:13:14 2010 ranaSummaryCDS40m computer slow down solvedAs part of the effort to debug what was
happening with the slow computers, I disabled
the auto MEDM snapshots process that Yoichi/Kakeru
  
  3883   Tue Nov 9 05:40:12 2010 yutaSummaryIOOMC aligning going on(Suresh, Yuta)

Background:
 MCalignNov9.png 
  3884   Wed Nov 10 02:51:35 2010 yutaSummaryIOOlimitation of current MC aligning(Suresh, Yuta)

Summary:
 MCalignNov9.png 
  3885   Wed Nov 10 11:46:19 2010 KojiSummaryIOOlimitation of current MC aligningIt didn't make sense in several points.
1. Is the Faraday aperture really
3mm? The beam has the gaussian radius of
  
  3886   Wed Nov 10 12:21:18 2010 yutaSummaryIOOlimitation of current MC aligning1. We didn't measure the aperture size
last night. We have to check that.
  
  3887   Wed Nov 10 14:28:33 2010 KojiSummaryIOOlimitation of current MC aligning1. Look at the Faraday.
2. Look at the wiki. There is the
optical layout in PNG and PDF.
  
  3891   Thu Nov 11 04:32:53 2010 yutaSummaryCDSfound poor contact of DAC cable, previous A2L results were wrong(Koji, Jenne, Yuta)

  
  3892   Thu Nov 11 05:56:04 2010 yutaSummaryIOOsetting up temporary oplev for coil balancing of MCs(Suresh, Yuta)

Background:
 MC2coils.png 
  3895   Thu Nov 11 11:51:30 2010 KojiSummaryCDSfound poor contact of DAC cable, previous A2L results were wrongThe cause is apparent!
The connectors on the cables are wrong!
  
  3901   Thu Nov 11 23:35:23 2010 KojiSummaryCDSfound poor contact of DAC cable, previous A2L results were wrong[Koji / Yuta]
There were
 IMG_3698.jpgbad-boys.pngIMG_3705.jpgIMG_3706.jpg 
  3924   Mon Nov 15 15:02:00 2010 KojiSummaryPSLpower measurements around the PMC[Valera Yuta Kiwamu Koji]
Kiwamu burtrestored c1psl.  We measured
the power levels around the PMC.
  
  3941   Wed Nov 17 20:44:59 2010 yutaSummaryCDSno QPD channels on c1sus machine today(Joe, Suresh, Yuta)

  
  3948   Thu Nov 18 16:32:21 2010 yutaSummaryCDScurrent damping status for all optics c1sus handlesSummary:
   I set Q-values for each
ringdown of PRM, BS, ITMX, ITMY, MC1, MC2,
 c1susdampings.png 
  3950   Thu Nov 18 17:42:20 2010 Joonho LeeSummaryElectronicsCCD cables.I finished
the direct measurement of cable impedances.
Moreover,
 Upgrade_plan_(Nov18).pdf 
  3961   Sat Nov 20 03:37:11 2010 yutaSummaryCDSCDS time delay measurement - the ripple(Koji, Joe, Yuta)

Motivation:
 c1tst16Kdelay.png 
  3963   Mon Nov 22 13:16:52 2010 josephbSummaryCDSCDS Plan for the weekCDS Objectives for the Week:
Monday/Tuesday:
1) Investigate ETMX SD sensor problems
2) Fully check out the ETMX suspension
  
  3976   Tue Nov 23 11:32:03 2010 JoonhoSummaryElectronicsRF distribution unit.The last time(Friday) I made an arrangement
for RF distribution unit.
I am making RF distribution unit
 Frequency_Distribution_Unit_Arrangement.jpg 
  3982   Tue Nov 23 23:13:40 2010 kiwamuSummaryCDSplan: we will install C1LSC [Joe, Suresh, Kiwamu]
 We
  
  3996   Tue Nov 30 12:33:27 2010 kiwamuSummaryIOOcabling of in-vac PZT mirrors     
  4010   Fri Dec 3 15:56:50 2010 Joonho, Jenne.SummaryElectronicsRF distribution unit planThe last time(Moonday) Jenne and I worked
on the RF distribution unit's structure.
We are making RF distribution unit
 RFsystem_plant_VISIO2.png 
  4011   Sun Dec 5 22:28:39 2010 ranaSummaryall down cond.power outageLooks like there was a power outage.
The control room workstations
were all off (except for op440m). Rosalba
  
  4012   Mon Dec 6 11:53:20 2010 josephb, kiwamuSummaryall down cond.power outageThe monitors for allegra and rossa's seemed
to be in a weird state after the power outage. 
I turned allegra and rossa on, but didn't
  
  4013   Mon Dec 6 11:57:21 2010 KojiSummaryall down cond.power outageI checked the vacuum system and judged
there is no apparent issue.
The chambers and annulus had been
  
  4049   Mon Dec 13 22:21:41 2010 kiwamuSummarySUSfunny output matrix of ETMX: solved !I found that
a few connections in the simulink model of
  
  4056   Wed Dec 15 12:46:18 2010 KojiSummaryIOOFinishing up the vac workWhat else?
v: Edit on Dec 15 10PM
  
  4084   Tue Dec 21 16:34:42 2010 kiwamuSummaryVACAll the test masses have been wiped [Jenne and Kiwamu]
 We wiped all the test masses with
  
  4098   Wed Dec 29 18:53:11 2010 ranaSummaryelogfound hung - restartedThis was the error today:
GET
/40m/ HTTP/1.1
  
  4102   Mon Jan 3 10:32:27 2011 kiwamuSummaryelogfound hung - restartedFound
exactly the same error messages at the end
  
  4109   Wed Jan 5 00:23:30 2011 ranaSummaryDAQFrameBuilder fails in a new waySince Leo was trying to demo his LIGO Data
Listener code, he noticed that there was
and NDS2 issue. The NDS2 guy (JZ) noticed
  
  4112   Wed Jan 5 16:00:11 2011 rana, alexSummaryDAQFrameBuilder fails in a new wayEmail from Alex:
  
  4113   Wed Jan 5 16:11:17 2011 kiwamuSummaryIOOtemporary PZT connection   PZTconnection.png 
  4115   Wed Jan 5 22:14:41 2011 ranaSummaryDAQFrameBuilder fails in a new wayJust a proof that the DAQ is working -
ran DTT on nodus from 3 hours ago.
 Screen_shot_2011-01-05_at_10.13.21_PM.png 
  4132   Tue Jan 11 11:19:13 2011 josephbSummaryCDSStoring FE harddrives down Y armLacking
a better place, I've chosen the cabinet down
the Y arm which had ethernet cables and various
  
  4139   Tue Jan 11 21:08:19 2011 JoonhoSummaryCamerasCCD cables upgrade plan.Today
I have made the CCD Cable Upgrade Plan for
improvement of sysmtem.
 CCD_Cable_Upgrade_Plan_Jan11_2011.pdf 
  4180   Thu Jan 20 22:17:12 2011 ranaSummaryLSCFPMI Displacement NoiseI found this old plot in an old elog entry
of Osamu's (original
link).
 osamu-1140657006.pdf 
  4213   Thu Jan 27 17:12:02 2011 Aidan, JoeSummaryGreen LockingDigital Frequency to Amplitude converterJoe and I built a very simple digital frequency
to amplitude converter using the RCG. The
input from an ADC channel goes through a
 Screenshot.pngSwept_sine_F_to_A.png 
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