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IDdown Date Author Type Category Subject Text Attachments
  43   Tue Feb 2 18:22:38 2010 FrankElectronicsDAQQPD channelsQPD channels for RefCav beam pointing measurements:
C3:PSL-RCAV_QPDX : X
C3:PSL-RCAV_QPDY : Y
  
  42   Tue Feb 2 16:36:46 2010 FrankElectronicsDAQDAQ pinouts3123-card (16bit input), 25pin d-sub connector

    
        
  
  41   Mon Feb 1 12:51:43 2010 Rana, FrankDailyProgressNoiseBudgetFirst Refcav noise measurementAttached is the relative frequency noise between
the 2 reference cavities downstairs. 
 refcav-noise.pdf 
  40   Thu Jan 28 16:07:29 2010 FrankComputingDAQpsl channels moved to C3 + new channelshere is a list of all channels of the psl
subsystem. We changed the generic channel
names to final names now.
  
  39   Wed Jan 27 11:25:33 2010 FrankLaserRefCavfrequency findings


   
        
            
  
  38   Tue Jan 26 03:38:10 2010 ranaLaserRefCavfrequency findings I guess if you have a frequency counter
with a GPIB interface or a simple flip-flop
XOR based phase/frequency discriminator,
  
  37   Sun Jan 24 18:35:47 2010 FrankLaserRefCavnew slow actuator values- more insulation to the refcav chamber
added
actual slow actuator values for both
  
  36   Fri Jan 15 20:19:54 2010 FrankLaserRefCavboth cavities lockedafter some trouble with fluctuating temperatures
and a brocken cable to the vco i could finally
lock both cavities. So now we can take first
  
  35   Fri Jan 15 12:53:31 2010 FrankLaserRefCavlatest slow actuator valuesrefcav: 0.9512 @ 70.02 degC
acav: 0.9252 @ 39.996 degC
with 0.858V/GHz  -> 
  
  34   Fri Jan 15 12:28:54 2010 FrankLaserRefCavfoam cutting machinein order
to build a custom fit insulation for the
cavities i've built some hot wire foam cutting
 12x 
  33   Fri Jan 15 11:35:17 2010 FrankLaserRefCavrefcav updatethe last
couple of days we fixed a couple of thinks:
We
 100_0542.JPG 
  32   Tue Dec 29 19:21:11 2009 FrankLaserRefCavtemperature stabilityhere a plot of the temperatute stability
in peter's lab (upper graph) if nobody is
working in the lab (christmas) and if someone
 refcav_temp1.jpg 
  31   Mon Dec 28 17:01:43 2009 FrankLaserRefCavthermal insulation end caps addedwe added two endcaps for the first refcav
and additional insulation for the ion pump
and valve.
 100_0456.JPG 
  30   Tue Dec 22 16:15:03 2009 FrankLaserRefCavFSS settingssettings for the FSS:
common gain : 1dB
fast gain : 15dB
  
  29   Tue Dec 22 00:47:40 2009 FrankLaserRefCavcavity temp stabilizationwe repaired the sensors on the first refcav
and  renamed and added channels to the
DAQ. The channels are now:
  
  28   Fri Dec 18 13:13:12 2009 FrankComputingDAQchannels for new VME-based DAQ system now available in fb1the new channels are available as C3:PSL-GENxxxx
on fb1. We have three cards installed so
far:
  
  27   Thu Dec 17 18:13:01 2009 FrankElectronicsRefCavpower supply remote programmingpictures taken from the existing power
supply.
.
 100_0437.JPG000_0005.jpg 
  26   Thu Dec 17 16:57:10 2009 FrankComputingDAQnew analyzer cavity DAQ systemwe set up a second, independent DAQ system
for the analyzer cavity. It has one 16bit
D/A card, 16bit A/D card and 12bit A/D card.
  
  25   Thu Dec 17 13:55:07 2009 FrankComputingDAQBaja4700 jumper settings and setupin order to get the baja4700 cpu 
work the jumpers have to be like this
 100_0428.JPG100_0431.JPG100_0432.JPG 
  24   Fri Dec 11 19:45:15 2009 FrankLaserRefCavLHO RefCav availablethere
is a full LIGO RefCav available here at LHO.
They don"t use it anymore and its just
  
  23   Sun Dec 6 14:54:43 2009 FrankLaserRefCavtemp sensor added on refcav2added
a single temp sensor on refcav2 (AD590) last
week  in order to monitor the temp of
  
  22   Sun Dec 6 13:20:52 2009 FrankElectronicsVCOVCO tuning


   
        
            
 vco-tuning.jpgvco-tuning.ps 
  21   Mon Nov 30 15:01:40 2009 FrankElectronicsVCOVCO tuningmeasured frequency tuning vs wideband input
of VCO for calibration of measured spectra.
graph coming soon...
  
  20   Tue Nov 24 11:07:30 2009 FrankLaserRefCavslow actuator settingsslow actuator settings for being resonant:
update
@1pm:
  
  19   Mon Nov 23 17:05:51 2009 FrankLaserRefCavheater and insulation addedadded
the four Minco heaters and a first layer
of 1" thick foam insulation to the second
 100_0376.jpg100_0379.jpg100_0383.jpg100_0391.jpg 
  18   Sat Nov 21 17:27:32 2009 FrankMiscRefCavold Minco heatersfound
four old Minco heaters (model HR5494-106)
(from 1995) .  This type with 106 Ohms
  
  17   Thu Nov 19 18:50:33 2009 AlbertoComputingComputersElog debugging output - Down time programmed today to make changes

    
        
  
  16   Thu Nov 19 16:06:30 2009 AlbertoComputingComputersElog debugging output - Down time programmed today to make changesWe want the elog process to run in verbose
mode so that we can see what's going. The
idea is to track the events that trigger
  
  15   Wed Nov 18 20:52:39 2009 FrankLaserLaserlaser errorthis morning the laser was off with the
error "HT error". As the chiller
was off too i think that means high temperature
  
  14   Wed Nov 18 20:45:52 2009 FrankMiscRefCavleaking vaccum valveafter
getting the o-ring from the drever lab for
the adapter to the turbo pump to pump the
  
  13   Tue Nov 17 12:01:54 2009 FrankMiscRefCavheaters for the other two chambers


   
        
            
  
  12   Fri Nov 13 12:46:35 2009 ranaMiscRefCavheaters for the other two chambersFor the heater, my main concern is on the
residual thermal gradients after stabilization.
The Alnis, Hansch, et al papers described
  
  11   Fri Nov 13 11:12:38 2009 FrankLaserRefCav temp settings for both cavitiescurrent settings for the slow actuator
to bring the cavities on resonance are:

    refcav 1 : 0.6836V
  
  10   Fri Nov 13 10:56:32 2009 FrankThings to BuyRefCavheaters for the other two chambers


   
        
            
  
  9   Thu Nov 12 20:56:38 2009 ranaThings to BuyRefCavheaters for the other two chambersI think its important to think of a good
solution, since we may want to retrofit some
other chambers.
  
  8   Thu Nov 12 18:01:10 2009 FrankThings to BuyRefCavheaters for the other two chambersin order
to improve the stability of the chamber temperature
the current plan is to add a heater and insulation
  
  7   Thu Nov 12 17:45:02 2009 FrankLaserRefCavlaser crzstal temp settings for both cavitiescurrently the setting for the NPRO temp
slider is:

    refcav 1: 0.7341
  
  6   Thu Nov 12 17:39:49 2009 FrankElectronicsVCOtuning rangetuning range of the 80MHz VCO used for
the frequency stabilization:
 tuning.pdftuning.png 
  5   Mon Nov 9 18:49:15 2009 FrankLaserRefCavresonance frequencies


   
        
            
  
  4   Mon Nov 9 02:19:45 2009 ranaLaserRefCavresonance frequenciesI don't know if its worth the trouble,
but we do have a ~200 MHz AOM. Sam Waldman
had us buy one of these for doing the OMC
  
  3   Sun Nov 8 14:38:56 2009 FrankLaserDAQchannels for the temperature scanthe channels used for the refcav temp scan
are:

    C:PSL-PMC_PMCTRANSPD 
  
  2   Sun Nov 8 14:35:25 2009 FrankLaserRefCavresonance frequenciesi checked the resonant frequency of both
cavities in order to see if we can lock both
using the existing frequency actuator (AOM)
  
  1   Thu Nov 5 07:07:40 2009 ranaMiscRC noiseFrank's pictures in other loghttp://nodus.ligo.caltech.edu:8080/AdhikariLab/423   
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