40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 249 of 339  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  4577   Wed Apr 27 21:19:25 2011 kiwamuUpdateLSCLSC whitening for PD1-4On
the back side of 1Y2 rack I found a cable,
CAB-1X2-LSC_7, which is supposed to be connected
 Screenshot-1.png 
  4576   Wed Apr 27 21:08:08 2011 ranaUpdateLSCAS11I worked
on AS_11 today. Its ready for its noise /
 AS11.png 
  4575   Wed Apr 27 20:14:16 2011 AidanSummaryelogRestarted with script ...    
  4574   Wed Apr 27 18:14:48 2011 kiwamuUpdateLSCpreparation for DRMI locking : RF status   RF_Work_Status.png 
  4573   Wed Apr 27 17:38:01 2011 kiwamuUpdateElectronicsRe : AS55 demod board with new 90 deg splitter : healthy   relativephase.pngIQamplitude.png 
  4572   Wed Apr 27 15:34:38 2011 kiwamuUpdateElectronicsAS55 demod board with new 90 deg splitter : healthy
A new 90 deg splitter, PSCQ-2-51W,
  
  4571   Tue Apr 26 22:56:35 2011 ZachUpdateelogrestarted with script   
  4570   Tue Apr 26 22:56:01 2011 kiwamuUpdateLSCc1iscaux2 and c1iscaux restratedWhile checking whitening filters on the
LSC rack, I found some epics controls for
the whitening looked not working.
  
  4569   Tue Apr 26 22:03:49 2011 ranaUpdateElectronicsPOX_11 debuggingI used the Jenne AM laser to tune up the
PD (used to be POX_11 but now is called REFL_11).
In addition to the notch at 22 MHz, I have
 MM7.png 
  4568   Tue Apr 26 01:20:02 2011 ranaUpdateElectronicsPOX_11 debuggingThe performance plots for   
  4567   Mon Apr 25 22:38:49 2011 kiwamuUpdateLSCprepration for DRMI : Y arm flashingThis
week is going to be a recycled Michelson
  
  4566   Mon Apr 25 12:55:35 2011 AlastairBureaucracyComputerswiki?


   
        
            
  
  4565   Mon Apr 25 12:55:19 2011 JenneBureaucracyComputerswiki?


   
        
            
  
  4564   Mon Apr 25 11:58:37 2011 JamieBureaucracyComputerswiki?


   
        
            
  
  4563   Mon Apr 25 11:23:41 2011 AlastairBureaucracyComputerswiki?40m wiki seems to have been down for quite
a while now but I can't see any info in the
elog about it.  Is there some ongoing
 119427.strip.gif 
  4562   Sun Apr 24 21:37:40 2011 kiwamuUpdateIOOreview of triple resonant EOM : model looks fineTo design a new resonant EOM box I started
reviewing the prototype that I've built.
 As a part of reviewing I checked
 Input_impedance.pngEOMcircuitmodel.png 
  4561   Fri Apr 22 12:07:38 2011 josephb, steveUpdateCDSRemoved hanging D-sub to SCSI in 1X2Problem:
Way back, Jay had D-sub
to SCSI adapters made to adapt our existing
Sander box AA filters to the new SCSI based
  
  4560   Fri Apr 22 11:08:50 2011 kiwamuUpdateLSCdemod board AS11 : amplitude imbalanceAmplitude
imbalance between I and Q in a demod board,
 IQamplitude.png 
  4559   Fri Apr 22 10:28:22 2011 ranaUpdateRF SystemRF Source HarmonicsYou should be able to resolve the other harmonics
by [B][COLOR=blue]decreasing the IF BW or
RBW[/COLOR][/B] on the analyzer. Even though
  
  4558   Fri Apr 22 09:25:43 2011 SureshUpdateRF SystemRF Source: Temperature sensor relocatedRF Amp operating temperature
Earlier measurement reported by Alberto
in LIGO-T10004-61-v1 based on the LM34 temperature
 P4220056.JPG 
  4557   Fri Apr 22 09:05:53 2011 SureshUpdateRF SystemRF Source Harmonics
As seen in the previous measurement the first
harmonic of both the 11 MHz and 55 MHz outputs
  
  4556   Fri Apr 22 02:10:53 2011 ZachUpdateelogrestartedRestarted the elog with the script.   
  4555   Thu Apr 21 21:46:22 2011 kiwamuUpdateLSCdemod board : new 90 deg splitterA less
LO power dependence on the relative phase
 relativephase.png 
  4554   Thu Apr 21 21:24:41 2011 kiwamuUpdateLSCdemod board : new 90 deg splitterA
new 90 degree splitter, PSCQ-2-51W, has arrived
today and I installed it on a demod board
 DSC_2949_ss.jpgDSC_2951.JPGDSC_2952_ss.jpg 
  4553   Thu Apr 21 15:20:46 2011 steveUpdatePEMPSL enclosure work today

    

       
            
 P1070558.JPGP1070560.JPG 
  4552   Thu Apr 21 15:03:29 2011 steveUpdateComputersjuction board finds homeThe anti aliasing box was opened up at
the back to accommodate the junction board
and the SCSI cable towards the ADC. Aluminum
 P1070570.JPGP1070568.JPG 
  4551   Thu Apr 21 14:39:43 2011 steveUpdateRF Systemnew strain relieved N connectors at APNew right angle PVC, 2 x 2 x  1/4"
installed at the AP table to strain relief
the 1/4" spiral corrugated RF coaxes.
 P1070562.JPGP1070564.JPG 
  4550   Thu Apr 21 08:26:42 2011 steveUpdatePEMPSL enclosure work todayThe east side window guides  will
be replaced by one long U-channel. There
will be drilling into 2x2 steel frame. It
  
  4549   Wed Apr 20 23:20:49 2011 jamieSummaryComputersinstallation of CDS tools on pianosaThis is an overview of how I got (almost)
all the CDS tools running on pianosa, the
new Ubuntu 10.04 control room work station.
  
  4548   Wed Apr 20 22:29:07 2011 sureshUpdateRF SystemPlan for LSC rackThe suggested layout of the 1Y2 Rack is
shown below.
To simplify the wiring, I have largely
 1Y2_Rack_Layout.png 
  4547   Wed Apr 20 21:53:01 2011 SureshConfigurationRF SystemRF system: Stray heliax cableWe found a stray unused heliax   rogue_cable_1.png 
  4546   Wed Apr 20 20:42:55 2011 kiwamuUpdateVIDEOtoday's video session[Steve / Suresh / Kiwamu]
90
% of unused video cables have been removed.
 DSC_2931_ss.jpgDSC_2938_ss.jpg 
  4545   Wed Apr 20 11:02:18 2011 josephbUpdateCDSMEDM screens and Front Ends updated to new MatricesWe simply didn't any matrices larger than
16x16.  If we had, than that matrix would
not have worked properly since the beginning.



  
  4544   Tue Apr 19 17:34:02 2011 KojiUpdateCDSMEDM screens and Front Ends updated to new MatricesJust a curiosity:
I just wonder how you have distingushed
the difference between _1
  
  4543   Tue Apr 19 15:48:43 2011 josephbUpdateCDSMEDM screens and Front Ends updated to new MatricesProblem:
The original matrix
naming conventions for the front ends was
  
  4542   Mon Apr 18 21:14:53 2011 JamieConfigurationComputersnew control room machine: pianosaAlso, op440m's Sun monitor did not work well
with pianosa, so I'm lending pianosa my HP
monitor until we can get a suitable replacement.
  
  4541   Mon Apr 18 21:09:45 2011 JamieConfigurationComputersnew control room machine: pianosaI've just installed the new control room
machine: "pianosa".   It is
a replacement for the old sun machine "op440m"
  
  4540   Mon Apr 18 17:47:41 2011 kiwamuConfigurationLSCLSC rack's ADC cablingTo
understand the situation of the ADC cabling
at the LSC rack I looked around the rack
 LSCrack.png 
  4539   Mon Apr 18 14:11:44 2011 kiwamuUpdateLSCRF status We
will make them all green !!
 RF_Work_Status.png 
  4538   Mon Apr 18 13:05:57 2011 kiwamuSummaryLSCdemod board modificationHere
is the idea how we upgrade the demodulation
boards. 
 demod_board.png 
  4537   Sat Apr 16 02:00:14 2011 ranaUpdateLSC11MHz demod board : 90 degree splitterOne way to avoid some of the bad stuff
in there is to take the 1 dBm input and amplify
it to ~21 dBm before splitting and sending
  
  4536   Fri Apr 15 22:57:38 2011 Aidan, JamieConfigurationLSCAS PD and Camera installedAS port ITMX YAW  range where AS beam
was visible = [-1.505, -1.225] - these extrema
put the beam just outside of some aperture
  
  4534   Fri Apr 15 22:54:20 2011 Aidan, BryanUpdateGreen LockingBeat note amplitude on Vertex PDI was investigating the beat note amplitude
on the vertex PD again yesterday. The incident
power on the PD was 150uW in the PSL green
  
  4533   Fri Apr 15 15:15:08 2011 kiwamuUpdateLSC11MHz demod board : 90 degree splitter[Rana, Koji, Kiwamu]
 Moreover
the amplitude of the I and Q signals are
  
  4532   Fri Apr 15 13:43:23 2011 BryanConfigurationGreen LockingI leave you with these messages...Y-end PDH electronics.  Y_End_Electronics_TF.png 
  4531   Fri Apr 15 13:40:00 2011 Larisa ThorneUpdateElectronicsLow pass filter for X arm laser temperature control, second tryPlotting the data points yielded by the
spec analyzer of my first LPF yielded a result
that was not expected: the desired cutoff
 Bode2.jpegBode100k.jpg 
  4530   Fri Apr 15 12:17:39 2011 kiwamuUpdateLSC11MHz demod board : funny I-Q phaseDuring checking
the 11MHz demod boards I found that the I-Q
 relativephase.png 
  4529   Fri Apr 15 02:30:24 2011 KojiHowToVIDEOVideo switching tipI have made a small python script to handle
the video matrix.
It is too far from the perfection,
  
  4528   Fri Apr 15 02:18:50 2011 KojiUpdateLSCBunch of RF cables removedWhile Kiwamu was working on the RF cabling
at the LSC rack, I removed 80% of SMA cables
which were not connected anywhere.
  
  4527   Fri Apr 15 02:17:18 2011 kiwamuUpdateLSCMichelson locked[Koji / Kiwamu]
The
  
ELOG V3.1.3-