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ID Date Author Typeup Category Subject Text Attachments
  4176   Thu Jan 20 15:15:39 2011 kiwamuUpdateGreen Lockingstatus update: PLL connected to ADCI
realized that the black AA board I mentioned
  
  4177   Thu Jan 20 15:39:59 2011 AidanUpdateLockingUpper limit on frequency noise of ADC[Aidan, Kiwamu]
Kiwamu and I plugged the output from
a DS3456 function generator into the ADC
 Sine-wave-width-test_of_ADC.pdf 
  4179   Thu Jan 20 18:20:55 2011 josephbUpdateCDSc1iscex computer and c1sus computer swappedSince
the 1U sized computers don't have enough
slots to hold the host interface board, RFM
  
  4181   Fri Jan 21 02:45:43 2011 kiwamuUpdateGreen Lockinginterface for PLL to ADC  [Suresh, Kiwamu]
  
  
  4183   Fri Jan 21 15:26:15 2011 josephbUpdateCDSc1sus broken yesterday and now fixed[Joe,
Koji]
Yesterday's CDS swap of c1sus and
  
  4184   Fri Jan 21 17:59:27 2011 josephb, alexUpdateCDSFixed Dolphin transmissionThe orientation
of the Dolphin cards seems to be opposite
on c1lsc and c1sus.  The wide part is
  
  4187   Sat Jan 22 01:56:04 2011 SureshUpdateGreen LockingExamining the stability of VCO PLL at low frequencies[Kiwamu,
Suresh, Rana]
Our
 VCO_PLL_stability.pngVCO_PLL_stability.png 
  4188   Sat Jan 22 02:03:55 2011 KojiUpdateGreen LockingExamining the stability of VCO PLL at low frequenciesDamn.
If this figure is true, we were looking at
wrong signal. We should look at the feedback
  
  4189   Sat Jan 22 02:11:09 2011 kiwamuUpdateGreen Lockingsome more progress[Rana, Suresh, Kiwanu]

  
  4190   Sat Jan 22 02:23:26 2011 KojiUpdateGreen Lockingsome more progressWhat is the point to use the error instead
of the feedback? It does not make sense to
me.
  
  4191   Mon Jan 24 02:58:46 2011 kiwamuUpdateGreen LockingX arm locked !I succeeded in  time_series.pnggreen_one_arm.png 
  4192   Mon Jan 24 09:33:08 2011 ranaUpdateGreen LockingX arm locked !Very cool.
But the PLL seems very fishy to me.
The ZP-3MH needs 13 dBm to operate correctly.
  
  4193   Mon Jan 24 10:19:21 2011 KojiUpdateGreen LockingX arm locked !Well... The ALS loop is engaged and the
error was suppressed. 
So, how is the IR error signal stabilized
  
  4195   Mon Jan 24 13:08:07 2011 kiwamuUpdateGreen LockingRe: X arm locked !


   
        
            
 e_pll_oltf.png 
  4196   Mon Jan 24 14:27:13 2011 kiwamuUpdateGreen LockingRe: X arm locked !


   
        
            
 masslock_oltf.png 
  4197   Tue Jan 25 00:09:54 2011 KojiUpdateGeneralJenne laser is at PSL LabI found Tara's elog entry that Jenne laser
is at PSL Lab. 
Since we recently use it frequently,
  
  4198   Tue Jan 25 05:26:51 2011 kiwamuUpdateGreen Lockingcavity scan   cavity_scan.png 
  4199   Tue Jan 25 06:48:55 2011 kiwamuUpdateGreen LockingTo do listHere are some
tasks that I want someone to work on during
  
  4200   Tue Jan 25 15:20:38 2011 josephbUpdateCDSUpdated c1rfm model plus new naming convention for RFM/DolphinAfter
sitting down for 5 minutes and thinking about
it, I realized the names I had been using
  
  4201   Tue Jan 25 20:42:46 2011 OsamuUpdateGreen LockingSlow servo for green laserI implemented a slow servo for green laser
thermal control on c1scx.mdl. Ch6,7 of ADC
and ch6 of DAC are assigned for this servo
  
  4202   Tue Jan 25 21:57:59 2011 KojiUpdateGreen LockingSlow servo for green laser1. The dewhitening filter CH6 had no output.
I disconnected the cable and put it to the
monitor out of the AI filter.
 110125_Xend_thermal.pdf 
  4203   Tue Jan 25 22:49:13 2011 KojiUpdateCDSFront End multiple crashSTATUS: 

    Rebooted c1lsc and
c1sus. Restarted fb many times.
  
  4204   Wed Jan 26 02:18:12 2011 KojiUpdateSUSETMX length to angle matrixI have put an offset of 1000 counts to
C1:SUS-ETMX_ALS_OFFSET. This actually misalign
the mirror a lot.
  
  4205   Wed Jan 26 10:11:47 2011 AidanUpdateGreen Lockingcavity scan

    

       
            
  
  4206   Wed Jan 26 10:58:48 2011 josephbUpdateCDSFront End multiple crashLooking
at dmesg on c1lsc, it looks like the model
is starting, but then eventually times out
  
  4207   Wed Jan 26 12:03:45 2011 KojiUpdateCDSFront End multiple crashThis is definitely a nice magic to know
as the rebooting causes too much hustles.
Also, you and I should spend an hour
  
  4208   Wed Jan 26 12:04:31 2011 josephbUpdateCDSExplanation of why c1sus and c1lsc models crash when the other one goes downSo apparently
with the current Dolphin drivers, when one
of the nodes goes down (say c1lsc), it causes
  
  4209   Wed Jan 26 14:49:48 2011 AidanUpdateEnvironmentTurned on Control room AC80 degrees is too uncomfortable in the
control room so I turned on the AC. The set
point is 74F.
  
  4210   Thu Jan 27 03:24:56 2011 KevinUpdateElectronicsPOY Optical Transfer Function[Rana and Kevin]
I measured the optical transfer function
of POY and fit the data using LISO. The fit
 tf_pox_poy.pnglinearity.png 
  4211   Thu Jan 27 11:04:27 2011 KojiUpdateGreen Lockingbeat freq scanExperiment in the night of Jan 26.
o The arm was locked for the IR beam
and was aligned for it.
 arm_scan.pdfarm_cav_scan3.png110126_ALS_inloop.pdf 
  4212   Thu Jan 27 15:16:43 2011 josephbUpdateCDSUpdated generate_master_screens.pyI modified
the generate_master_screens.py script in
/opt/rtcds/caltech/c1/medm/master/ to handle
  
  4214   Thu Jan 27 21:10:47 2011 OsamuUpdate40m UpgradingCalibrated noise of greenI calibrated noise spectrum of green lock.
1. Measurement of conversion factor
of ADC input from V to ct:
 20110127_Calibrated_grrennoise.pdf20110127_Calibrated_grrennoise.jpg20110127_TF_ETMXSUSEXC_to_PZTOUT.pdf 
  4215   Thu Jan 27 21:43:37 2011 KojiUpdateGreen Lockingno transmission of ALS signalsNo signal is transmitted from C1:GCV-SCX_ETMX_ALS
(on c1gcv) to C1:GCV-SCX_ETMX_ALS (on c1scx)
I can't find RFM definition for ALS
  
  4219   Fri Jan 28 11:08:44 2011 josephbUpdateGreen Lockingno transmission of ALS signalsAs you've
correctly noted, the source of the C1:GCV-SCX_ETMX_ALS
channels is in the c1gcv model.  The first
  
  4220   Fri Jan 28 12:15:58 2011 josephbUpdateCDSUpdating conlog channel list/ working on "HealthCheck" scriptI've updated
the scan_adls script (currently located in
/cvs/cds/caltech/conlog/bin) to look at new
  
  4222   Fri Jan 28 13:07:31 2011 JenneUpdateIOOBeam is back on the WFSThe MC WFS have had beam dumps in front
of them for the past ~2 weeks, until I could
find the appropriate optic to put in the
  
  4224   Fri Jan 28 18:19:21 2011 JenneUpdateIOOWFS2 has some kind of oil on itMystery solved!
I removed WFS2 from the AP table
(after placing markers so I can put it back
 Oily_WFS2.jpg 
  4225   Sat Jan 29 00:31:05 2011 SureshUpdateGeneralVertex crane upgrade completedThe
Vertex crane is smarter and safer now. 
 6x 
  4226   Sat Jan 29 03:13:44 2011 ranaUpdateWienerFilteringImprovement in H1 Wiener FF prediction by using weights and taps(Jenne, Rana)
Tonight we noticed that there
were significant improvements to be had in
 darmweight.pngdarm3000.png 
  4230   Mon Jan 31 07:41:23 2011 AidanUpdateGreen LockingDFD - medm screenI added an MEDM screen for the DFD to the
GREEN screen. It is displayed in the attached
screen shot.
 Screenshot-3.png 
  4231   Mon Jan 31 10:31:30 2011 josephbUpdateWienerFilteringImprovement in H1 Wiener FF prediction by using weights and tapsRossa is a rather beefy machine. It effectively
has 8 Intel i7 Cores (2.67 Ghz each) and
12 Gigs of ram.  Megatron only has 8
  
  4232   Mon Jan 31 12:40:38 2011 rana, joeUpdateGreen LockingDFD - medm screenThis is a plot showing the old filters
and the new ones we added this morning.
The new ones have a Cheby for AC
 a.pdf 
  4233   Mon Jan 31 16:12:11 2011 steveUpdateVACVertex crane upgrade shorth coming


   
        
            
 P1070364.JPGP1070358.JPG 
  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 
  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 
  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 
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