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  40m Log, Page 45 of 341  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  1920   Mon Aug 17 17:43:11 2009 ranaSummaryGeneralconlogger restartedAdded the conlog directory to the SVN,
minus the enormous data directory. We are
now free to make changes to the conlog code.
  
  1921   Mon Aug 17 17:48:49 2009 robSummaryGeneralconlogger restarted


   
        
            
  
  1923   Tue Aug 18 14:24:43 2009 YoichiSummaryPSLReference Cavity InspectionRana, Koji, Yoichi

To see why the reflected beam from the RC
  
  1933   Fri Aug 21 17:28:50 2009 Kevin, ranaSummaryPEMMagnetic Field Measurements Around the Lab


 AC-field.pngDC-field.png 
  1934   Fri Aug 21 17:49:47 2009 YoichiSummaryComputersUpgrade FE conceptual planI started to draw a conceptual diagram of
the upgraded FE system.
http://nodus.ligo.caltech.edu:30888/FE/FE-Layout.html
 Picture_2.png 
  1941   Tue Aug 25 03:30:23 2009 YoichiSummaryWIKI-40M UpdateGreen lock and phase noiseWhile Koji and I were discussing about the
green laser lock, we wondered if the common
motion of the cavity mirrors,
 PhaseNoise.png 
  1942   Tue Aug 25 11:02:39 2009 ranaSummaryPSLTemperature BoxThe PSL Temperature Box (D980400-B-C, what
kind of numbering scheme is that?) modified
at LHO/LLO ~8 years ago to have better resolution
 D980400-B.pdf 
  1956   Thu Aug 27 13:42:08 2009 ranaSummaryPSLReference Cavity Temperature Control: psl.db changesI made the changes
to the psl.db to handle the new Temperature
  
  1958   Thu Aug 27 16:14:28 2009 steveSummaryOMCburned photodiodeOld -pre 6/2009  LLO DCPD 3 mm od
GTRAN photodiode
 20090827_173252.jpg20090827_170802.jpg 
  1967   Fri Sep 4 16:09:26 2009 josephbSummaryVACRebooted RGA computer and reset RGA settingsSteve noticed the RGA was not working today. 
It was powered on but no other lights were
lit.
  
  1978   Tue Sep 8 20:15:33 2009 rana, jenneSummaryPSLRC temperature servo: Heater Voltage noiseWe measured the voltage noise of the
heater used to control the RC can temperature.
It is large.
 09080901.PDFTEK00074.PNG 
  1993   Fri Sep 18 16:26:02 2009 steveSummaryPSLNeslab chiller is OKRob found puddles of water very close to
the chiller during lunch time. We raised
the unit and took the side cover off. All
  
  1999   Thu Sep 24 20:17:05 2009 ranaSummaryLSCComparison of Material Properties for the new RFPD Mounts
    

       
             
  
  2043   Fri Oct 2 15:24:29 2009 sanjit, ranaSummaryIOOmcwfs centeredwe set the offsets for the MCWFS DC and
for the MCWFS demod outputs and then turned
off the lights put the MZ at half fringe
 Untitled.png 
  2064   Wed Oct 7 11:18:40 2009 kiwamuSummaryElectronicsracks of electronics 
I took the pictures of all racks
of electronics yesterday, and then uploaded
  
  2070   Thu Oct 8 20:18:56 2009 KojiSummaryGeneralArm cavity lossLast night (Oct 07), I ran armLoss script
in order to obtain the latest numbers for
the arm cavity loss.
  
  2071   Thu Oct 8 21:32:59 2009 KojiSummaryGeneralRecycling cavity lossI looked at the data of the day before
yesterday (Oct 06) to know how much is the
recycling gain.
  
  2094   Thu Oct 15 01:21:31 2009 ranaSummaryCOCThermal Lensing in the ITMThermal lensing formula:
 Untitled.pngaa.png 
  2097   Thu Oct 15 09:23:07 2009 steveSummaryLockingnever had it so goodAwesome 5 hrs of locking  Rob!  5hlock.jpg 
  2100   Thu Oct 15 17:12:00 2009 ranaSummaryLockingnever had it so good 
  
  2101   Fri Oct 16 03:16:50 2009 rana, robSummaryLSCfunny timing setup on the LSCWhile measuring the Piezo Jena noise
tonight we noticed that the LSC timing is
setup strangely. 
 1X3_1.JPG 
  2104   Fri Oct 16 13:25:18 2009 KojiSummaryLSCfunny timing setup on the LSCCould be this.
http://ilog.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=detector&task=view&date_to_view=10/02/2009&anchor_to_scroll_to=2009:10:02:13:33:49-waldman

  
  2118   Mon Oct 19 14:48:15 2009 rana, robSummaryElectronicspiezo jena measuring boxAttached is the schematic of the Piezo Jena
driver measuring box made in a Pomona box:
 PA160153.JPGPA160151.JPG 
  2130   Wed Oct 21 16:18:12 2009 SteveSummarySAFETYLIGO Safety Officers visited the 40m David Nolting, chief LIGO Safety Officer
and his lieutenants from LLO and LHO paid
homage to the 40m lab this morning.
  
  2137   Fri Oct 23 09:13:45 2009 steveSummaryVACRGA scanPump down #66 is 435 days old. RGA scan
is normal. New maglev is fine. New UPS is
in place but not hooked up to communicate.
 pd66md435.jpgpd66d435ptt.jpg 
  2157   Wed Oct 28 17:20:21 2009 ranaSummaryCOCETM HR reflectivity plotThis is a plot of the R and T of the existing
ETM's HR coating. I have only used 1/4 wave
layers (in addition to the standard 1/2 wave
 etm_40_1998.png 
  2231   Tue Nov 10 21:46:31 2009 ranaSummaryComputersTest Point Number Mapping


   
        
            
  
  2247   Thu Nov 12 02:02:18 2009 ranaSummaryLSCArm Locking with no feedback to the ETM or ITMSteps:
1) Turn off feedback to ETMY (the
ETMY button on the LSC screen).
 nohands-2.pdf 
  2283   Tue Nov 17 15:54:34 2009 ranaSummaryPEM40 days of weatherthe inside temperature is alarming at the
red level today - should check if the HIHI
value is set correctly
 Untitled.pdf 
  2286   Tue Nov 17 21:10:35 2009 ranaSummaryElectronicsBusby Low Noise Box: Photos and Upgrades   IMG_0217.JPGbusby-noise.png 
  2288   Wed Nov 18 00:38:33 2009 ranaSummaryElectronicsVoltage Noise of the SR560's OUTPUTs (the back panel)I've
measured the voltage noise of the SR560's
lead acid battery outputs; they're not so
 sr560.png 
  2304   Fri Nov 20 00:18:45 2009 ranaSummaryCamerasVideo MUX Selection Wiki pageSteve is summarizing the Video Matrix
choices into this Wiki page:
http://lhocds.ligo-wa.caltech.edu:8000/40m/Electronics/VideoMUX
  
  2314   Mon Nov 23 16:28:12 2009 steveSummaryCamerasVideo swicher options


   
        
            
  
  2406   Sun Dec 13 20:50:45 2009 ranaSummaryIOOMach Zender CalibrationI ramped the MZ PZT (with the loop disabled
on the input switch) to calibrate it. Since
the transmission has been blocked, I used
 Untitled.png 
  2407   Sun Dec 13 23:18:09 2009 ranaSummaryIOODisplacement noise on the PSL tableFor the Laser Gyro, I wondered how much
mechanical noise we might get with a non-suspended
cavity. My guess is that the PMC is better
 mz.pdf 
  2436   Mon Dec 21 01:14:08 2009 ranaSummaryElectronicsNoise measurement of the Rai Weiss FET preamp box I shorted the input to the box and
then put its output into the SR560 (low noise,
G = 100, AC). I put the output of the SR560
 IMG_0242.JPGPicture_2.pngRWnoise.png 
  2452   Sat Dec 26 19:22:13 2009 KojiSummaryGeneralMode coupling of two astigmatic beamsIn this note, amplitude and power couplings
of two astigmatic (0,0)-th order gaussian
modes are calculated.
 mode_coupling.pdf 
  2499   Sun Jan 10 23:22:56 2010 JenneSummaryGeneralScattering Measurements of 35W Beam DumpsOn Friday, Rana and I measured the scatter coming from  P1090014_copy.JPGScatterometerSetup.png 
  2507   Tue Jan 12 09:14:52 2010 steveSummaryGeneralScattering Measurements of 35W Beam Dumps 
 What was the power level, polarization
and beam size at beam trap?
  
  2511   Tue Jan 12 14:28:01 2010 steveSummaryEnvironmentlab temp of 7 years

    
        
 labtemp7y.png 
  2514   Thu Jan 14 11:44:06 2010 josephbSummaryComputersMemory locations for TST model for ITMYThe main communications data structure
is RFM_FE_COMMS, from the rts/src/include/iscNetDsc40m.h
file.  The following comments regard
  
  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.
  
  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
  
  2583   Tue Feb 9 17:18:45 2010 josephbSummaryComputersLocking Y arm successful with fully replaced front-end for ITMYWe were able to lock the Y-arm using Megatron
and the RCG generated code, with nothing
connected to c1iscey.
  
  2584   Tue Feb 9 17:51:48 2010 JenneSummaryIOOInput Mode Matching Telescope design is completeThe upgrade's input mode matching telescope
design is complete.  A summary document
is on the MMT
  
  2588   Wed Feb 10 23:44:56 2010 KojiSummaryCOCPhase Map AnalysisIn the middle of the last month, Kiwamu
and I went to Garilynn's lab to measure the
phase maps of the new ITMs and SRMs.
 SRM01_HR_RoC_rad_15mm.pngSRM01_HR_RoC_scan.png 
  2645   Sun Feb 28 16:45:05 2010 ranaSummaryGeneralPower ON Recovery
    Turned ON the RAID above linux1.

   Hooked up a monitor and keyboard and
then turned ON linux1.
    After
  
  2664   Tue Mar 9 09:32:31 2010 KojiSummaryGeneralWideband measurement of Fast PZT responseI have measured a wideband response
of the fast PZT in the LWE NPRO 700mW in
the Alberto's setup.
 PZT_response.png 
  2682   Thu Mar 18 15:33:17 2010 kiwamuSummaryElectronicsadvantege of our triple resonant EOMIn
this LVC meeting I discussed about triple
resonant EOMs with Volker who was a main
 electrode.png 
  2683   Thu Mar 18 19:00:04 2010 KojiSummaryElectronicsadvantege of our triple resonant EOMDid you find what is the merit of their
impedance matching technique?

  
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