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IDup Date Author Type Category Subject Text Attachments
  4234   Mon Jan 31 18:25:25 2011 AidanUpdateGreen LockingDFD - results from the new filters (and running with AWG)


   
        
            
 DFD-bandwidth_noise_CLP500_to_300Hz.pdfDFD-bandwidth_noise_CLP500_to_7000kHz.pdf 
  4235   Tue Feb 1 15:09:41 2011 KojiOmnistructureGeneralProjector - fixedThe projector in the controls room has
been fixed the orange blinking of the status
LED.
  
  4236   Tue Feb 1 17:34:21 2011 JenneUpdateSUSETMX and PRM watchdogs trippedI sat down in the control room to find
that ETMX and PRM's watchdogs had been tripped. 
I don't know how long they've been crazy,
 Seis_1Feb2011.pngSeis_SUS_1Feb2011.png 
  4237   Wed Feb 2 03:27:20 2011 KojiSummaryGreen Locking85MHz Freq dividerThe freq divider was built and installed
in the beat detection path.
Attachment 1: Circuit diagram
 freq_divider.pdfIMG_3816.JPGIMG_3818.JPG 
  4238   Wed Feb 2 09:56:55 2011 KojiSummaryGreen LockingInstalled the freq divider and Rana's PFD- The freq divider and Rana's PFD were
hooked up to the ADCs. (Attachment 1)
(I leave the analog PFD not explained
 freq_divider_installation.pdf110201_freq_divider_output.pdf 
  4239   Wed Feb 2 10:44:26 2011 KojiSummaryGreen LockingFreq fluctuation measured by the freq divider and Rana's analog PFDThe freq fluctuation of the beat note
has been measured with the following condition

    The IR beam only locked
 110201_green_freq_fluctuation.pdf 
  4240   Wed Feb 2 12:55:34 2011 KojiSummaryGreen LockingFreq fluctuation measured by the freq divider and Rana's analog PFDI found that some flakiness of the beat
signals comes from the RF components for
the beat detection.
  
  4241   Wed Feb 2 15:07:20 2011 josephbUpdateCDSactivateDAQ.py now includes PEM channels[Joe, Jenne]
We
modified the activateDAQ.py script to handle
  
  4242   Thu Feb 3 01:46:54 2011 KevinUpdateElectronicsPOY Shot Noise and Dark Spectrum[Koji and Kevin]
I measured the shot noise of POY
and fit the data to determine the RF transimpedance
  
  4243   Thu Feb 3 04:43:58 2011 SureshUpdateElectronicsAdded two new DAQ channels[Suresh, Joe]
We added the following two new DAQ
channels into the c1:GCV model.  The
  
  4244   Thu Feb 3 11:13:52 2011 KojiUpdateElectronicsPOY Shot Noise and Dark SpectrumI wonder why POY11 has the dark noise level
of 90nV/rtHz that is  5 times larger than
that of POX (18nV/rtHz)
  
  4245   Thu Feb 3 16:08:06 2011 AidanUpdateComputer Scripts / ProgramsRCG VCO frequency errorJoe and I were looking at the RCG VCO algorithm
to determine if we could adapt it to run
at a faster rate (you can currently change
 VCO_error.pdf 
  4246   Thu Feb 3 16:45:28 2011 josephbUpdateCDSGeneral CDS updatesUpdated
the FILTER.adl file to have the yellow button
moved up, and replaced the symbol in the
  
  4247   Thu Feb 3 17:25:03 2011 josephbUpdateComputersrsync script was not really backing up /cvs/cdsSo today,
after an "rm" error while working
with the autoburt.pl script and burt restores
  
  4248   Fri Feb 4 11:10:27 2011 SureshUpdateGreen LockingVCO PLL Frequency noiseThis measurement pertains to the BL2002
VCO PLL unit.
 
 VCO_calibration.pngVCO_PLL_Servo.pngVCO_Gain.pngVCO_Transfer_Functions.pngVCO_PLL_Freq_Noise.png 
  4249   Fri Feb 4 13:31:16 2011 josephbUpdateCDSFE start scripts moved to scripts/FE/ from scripts/All start
and kill scripts for the front end models
have been moved into the FE directory under
  
  4250   Fri Feb 4 13:45:25 2011 josephbUpdateComputersTemporarily removed cronjob for rsync.backup<p>I removed the rsync backup from nodus'
crontab temporarily so as to not have multiple
backup jobs running.  The job I started
  
  4251   Fri Feb 4 15:03:20 2011 josephbUpdateComputersModified cshrc.40mRemoved
some lines from the PATH environment variable
since they point to old codes which no longer
  
  4252   Fri Feb 4 18:58:19 2011 ranaUpdateComputersTemporarily removed cronjob for rsync.backup

    
        
  
  4253   Fri Feb 4 23:39:56 2011 rana, kojiUpdateLSCmixer based FD set up for noise testWe set up the mixer based FD to check
out its noise performance.
It is being acquired as C1:GCV-XARM_FINE_OUT_DAQ.
  
  4254   Sat Feb 5 23:03:04 2011 rana, kojiSummaryElectronicsAnalog Frequency Discriminator: splitter + mixer + long cableThis diagram shows the setup  mixer.pdfUntitled.pngfsm.png 
  4255   Sun Feb 6 02:29:28 2011 ranaUpdateElectronicsAnalog MFD: longer cableI swapped over to a 3x longer cable (old
65 ft. Pasternak cable from ancient 40m days).
The old one was 6m, the new one is 18.2 m.
 mfd18.png 
  4256   Mon Feb 7 10:37:28 2011 josephbUpdateComputersTemporarily removed cronjob for rsync.backupThe backup appears to have finished on
nodus, and I've put the rsync job back in
the crontab.
  
  4257   Mon Feb 7 19:21:32 2011 Beard PapaMetaphysicsPhotosThe Adventures of Dr Stochino and Beard Papa    
  4258   Mon Feb 7 21:23:11 2011 ranaConfigurationPSLPSL FSS Temperature Sensor Interface box removedI noticed that the RMTEMP channel was spiking
myteriously when Kiwamu opened the PSL door.
We found out that the LEMO connectors would
 P2070555-1.JPG 
  4259   Tue Feb 8 10:23:02 2011 AidanSummaryGreen LockingDigital Frequency Discriminator - reference 
Here's the reference for the self-reference
frequency detection idea. See Figure 2.
  
  4260   Tue Feb 8 13:26:11 2011 AidanSummaryGreen LockingTemperature dependence of phase change of green on reflection I did a quick back of the envelope
calculation of the expected green phase change
on reflection from the aLIGO ITM.
  
  4261   Tue Feb 8 15:22:13 2011 kiwamuUpdateGreen Lockingnew electronics rack at X end Yesterday
I moved the whole green electronics stuff,
which had been sitting on the floor at the
 DSC_2861_ss.png 
  4262   Tue Feb 8 16:04:58 2011 josephbUpdateCDSHard coded decimation filters need to be fixed[Joe, Rana]
Filter definitions for the decimation
filters to epics readback channels (like
  
  4263   Tue Feb 8 16:44:43 2011 JenneUpdateComputersLIGO Grid Cluster client upgraded on RossaI did a yum-install of the latest ldg-client
(to get onto the LIGO Clusters) on Rossa. 
I followed the instructions on the
  
  4264   Wed Feb 9 10:25:46 2011 steveUpdateSAFETYAP tableI blocked the  AP table's south west
10" ID port since it is obsolete with
the new layout.
 P1070395.JPG 
  4265   Wed Feb 9 15:26:22 2011 josephbUpdateCDSUpdated c1scx with lockin, c1gcv for green transmission pdUpdated
the c1scx model to have two Lockin demodulators
(C1:SUS-ETMX_LOCKIN1 and C1:SUS-ETMX_LOCKIN2). 
  
  4266   Wed Feb 9 23:48:12 2011 SureshConfigurationCamerasVideo Cable work: New Labels[Larisa, Aidan,Steve,Suresh]
   Today was the first
session for implementing the new video cabling
  
  4267   Thu Feb 10 00:23:25 2011 JenneUpdateGreen LockingGreen TRX DC PD installed on PSLUsing a stray beam that is generated as
the transmitted green beam from the Xarm
goes through the viewport to the PSL table,
  
  4268   Thu Feb 10 05:06:35 2011 kiwamuUpdateGreen Lockingbeat noise : a little bit better, and 1Hz peak from amplitude noise coupling I
repeated the same measurement as that Koji
 Screen_shot_2011-02-10_at_4.01.43.pngScreen_shot_2011-02-10_at_4.52.13.png 
  4269   Thu Feb 10 11:16:31 2011 steveUpdatePEMsouth arm AC turned onThe air condition was off for the south
arm. I  turned it on.
  
  4270   Thu Feb 10 14:07:18 2011 josephbUpdateCDSUpdating dolphin drivers to eliminate timeouts when one dolphin card is shutdown[Joe,Alex]

Alex
  
  4271   Thu Feb 10 14:52:36 2011 AidanHowToComputersAdding filenames in MATLAB plotsThe following code is incredibly useful
when creating  MATLAB plots as it adds
the filename of the script to the plot itself.
  
  4272   Fri Feb 11 00:20:58 2011 SureshUpdateElectronicsREFL11: Photodiode requires replacement 
This is with reference to Kevin and
Jenne's elogs  # 3890,
 REFL11_10Feb2011.jpg 
  4273   Fri Feb 11 09:27:03 2011 steveConfigurationVACRGA scanThe RGA scan is normal at day 52 of this
pump down.
Light power BS 1064nm ~25mW, ETMX
 rgascan20110211.jpgpressurepd70.jpg 
  4274   Fri Feb 11 16:43:09 2011 steveUpdateVIDEOMC1 & 3 video monitorI set up video monitoring of MC1 and MC3  P1070415.JPG 
  4275   Sat Feb 12 08:08:05 2011 SureshUpdateElectronicsREFL11 Photodiode replacedA new photodiode ( Perkin and Elmer Model
no. C30642GH Sl No.1526) has been installed
in the place of the old photodiode. 
 C30642_datasheet-1.pdf40mUpgradeREFL11schematic.pdfP2120572.JPGP2120565.JPGP2120571.JPG 
  4276   Sat Feb 12 23:22:21 2011 ranaUpdateElectronicsREFL11 Photodiode replaced375 mW is way too much light. We must never
put more than 100 mW on any of these diodes.
We don't want to blow up more diodes like
  
  4277   Sun Feb 13 02:33:37 2011 KojiUpdateElectronicsREFL11 Photodiode replacedSuresh is saying 375mW and 0.375mW. Let's
wait for his update of the actual power.
Also he is not using EPICS, there
  
  4278   Sun Feb 13 15:02:23 2011 kiwamuUpdateGreen LockingX arm beam offcentering has been measuredThe amounts
of the X arm's beam off-centering have been
 misposition.png 
  4279   Sun Feb 13 16:20:53 2011 SureshUpdateElectronicsREFL11 Photodiode replacedIt is 0.375 mW as in the calculation. 
The total diode output is just 1mW and it
is divided with a 50/50 beam splitter... 
  
  4280   Sun Feb 13 16:50:17 2011 kiwamuUpdateASCIP_ANG was at wrong ADCI found that  xmen.jpg 
  4281   Mon Feb 14 00:39:21 2011 rana, sureshUpdateElectronicsVCO Frequency Noise Measurement with the MFDWe hooked up the VCO Driver output to the
MFD. We adjusted the levels with attenuators
to match up to the Level 7 mixer that's being
  
  4282   Mon Feb 14 01:19:18 2011 ranaUpdateCDSToday's CDS problemsThis is just a listing of  CDS problems
I still notice today:

    
    MC2-MCL
  
  4283   Mon Feb 14 01:40:14 2011 KojiOmnistructureCDSName of the green related channelsI propose to use C1:ALS-xxx_xxx for the
names of the green related channels, instead
of GCV, GCX, GCY, GFD...
  
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