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ID Date Authorup Type Category Subject Text Attachments
  305   Fri Aug 20 21:03:16 2010 FrankSummaryDAQchannel list for fb1 updated and framebuilder restartedi updated the database for epics channels
for the PSL lab and restarted the framebuilder
on fb1.
  
  306   Mon Aug 23 21:50:47 2010 FrankNotesRefCavchanged ACAV setpoint temperaturechanged setpoint for ACAV to 37.2 degrees,
disabled the FSS loop and enabled feedback
to laser temp using VCO input signal (C3:PSL-ACAV_VCOMON)
  
  307   Thu Aug 26 19:58:06 2010 FrankNotesBEATchanged ACAV setpoint temperature - both cavities lockedchanged the ACAV temp to 37.3 degrees.
Both cavities are locked now.
I'll monitor the VCO input signal
  
  308   Thu Aug 26 23:00:35 2010 FrankNotesBEATlock-loss of both cavitiesi lost lock of both cavities for some unknown
reason. Also the crate seemed to stop working
as some channels are dead now...
  
  309   Thu Aug 26 23:18:12 2010 FrankNotesBEATboth cavities relockedrelocked both cavities. The second crate
containing the output card to control the
ACAV power supply stopped working and i can't
  
  312   Fri Aug 27 19:02:24 2010 FrankNotesComputersDAQplz change the channel names. Those names
are bullshit...

  
  316   Mon Aug 30 22:16:51 2010 FrankNotesComputersnote for resetting psl crate set temp for the ACAV should be 37.3, that
was the value since about a week. see here
: http://131.215.115.52:8080/PSL_Lab/307
  
  319   Tue Aug 31 13:26:32 2010 FrankNotesEnvironmentantack (ants attack)any results from the poison from 40m they
tried in the TCS lab? Did it work?If yes
we should get some for the other labs too....
  
  321   Tue Aug 31 13:40:00 2010 FrankNotesComputersdead channel, C3:PSL-ACAV_TEMPAVGlooks like some fault of the database.
/usr1/epics/psl/db/acav.db does not contain
the correct entry. check rcav.db and copy
  
  323   Tue Aug 31 14:52:41 2010 FrankNotesComputersdead channel, C3:PSL-ACAV_TEMPAVGmade the changes a minute ago. simply reboot
after changing the values in the startup.cmd
(those i didn't change)
  
  324   Tue Aug 31 15:04:51 2010 FrankNotesComputersdead channel, C3:PSL-ACAV_TEMPAVGbe carefull with the data you are taking
right now. it's wrong for your projection
as the power fluctuations are different when
  
  325   Tue Aug 31 15:11:28 2010 FrankNotesDAQC3:PSL-ACAV_RCTRANSPD broken?can you plz check this channel as it is
constantly at -14.4797 since yesterday. Did
you disconnect it? If yes, plz elog those
  
  326   Tue Aug 31 15:15:44 2010 FrankNotesDAQhow to measure ACAV channels without RCAV lockedif you wanna measure anything in the ACAV
loop without the RCAV locked, don't forget
to DISABLE
  
  328   Tue Aug 31 15:52:43 2010 FrankNotesDAQC3:PSL-ACAV_RCTRANSPD broken?was it grey? If yes the cable already connected
to the T is the cable going to the DAQ. That's
why there is a T already. Don't disconnect
  
  333   Tue Aug 31 18:33:13 2010 FrankNotesRefCavchanged acav setpt back to 37.3don't change anything until it is stable
and you thought about it carefully. The system
was totally out of control, check the dataviewer!.
  
  334   Tue Aug 31 21:37:11 2010 FrankNotesRefCavchanged acav setpt back to 37.3

    
        
  
  335   Tue Aug 31 21:59:19 2010 FrankSummaryComputersstill network problemsi tried to figure out where the network
problems come from. Looks like it's the fiber
connection between fb1 and the switch in
  
  345   Wed Sep 8 19:10:53 2010 FrankDailyProgressLaserPBS/QWP-combination very badafter a lot of test it turned out that
the optically contacted QWP/PBS combinations
used for the reference cavity so far are
  
  346   Wed Sep 8 19:29:01 2010 FrankNotesDAQfunny EPICS channel problemsi have several channels, e.g "C3:PSL-RCAV_RCPID_SETPOINT",
loaded on the VME system as software channels.
  
  352   Thu Sep 9 23:20:19 2010 FrankSummaryComputersMAC address overview for PSL lab
    

       
            
  
  354   Fri Sep 10 12:25:34 2010 FrankNotesLaserconstruction work done - Laser back onworkers finished the piping stuff for today
but have to come back to connect it to the
stuff one floor above. It's not the sprinkler
  
  355   Fri Sep 10 12:32:04 2010 FrankSummaryComputersPSL crate rebootedrebooted the PSL crate to see if it fixes
the problem with some of the channels inaccessible
from external computers
  
  356   Fri Sep 10 14:37:37 2010 FrankSummaryDAQPSL crate reboot fixed channel problemsall channels are working now   
  410   Sat Nov 27 01:42:19 2010 FrankPhotosRefCavfoam insulation and temp sensor locationsome more photos for Koji and Tara about
the foam insulation and temp sensor location
 6x 
  419   Sun Dec 5 18:36:10 2010 FrankDailyProgressBEATPD for PLL: additional informationsome additional information:
the beat noise was measured as the
feedback signal to the VCO of the PLL, so
  
  425   Fri Dec 10 12:07:34 2010 FrankSummaryRefCavRCAV/ACAV polesvery interesting. ACAV was a brand new
cavity when we installed it, coming from
the same batch as all other LIGO refcavs.
  
  430   Wed Dec 15 01:35:44 2010 FrankNotesRefCavthings to do
    replace windows on acav chamber
by ar-coated windows
    find source
of reflection in cavity - my guess it is
  
  450   Mon Jan 24 19:05:41 2011 FrankNotesElectronics EquipmentRFPD photodiodesgot some 2mm InGaAs photodiodes from Peter.
So we can go ahead and replace the dirty
one from the ACAV RFPD tomorrow and re-tune
  
  453   Tue Jan 25 11:30:05 2011 FrankNotesElectronics EquipmentPerkin Elmer 2mm InGaAs photodiodes - dark current characterization   PerkinElmer_2mm.png 
  455   Wed Jan 26 20:21:57 2011 FrankSummaryElectronics EquipmentACAV RFPD modifiedThe ACAV RFPD stopped working this afternoon.
It had high current consumption on the +15V
supply, causing the supply to drop down to
 D980454-00_modified_ACAV.pdf 
  458   Mon Jan 31 19:42:36 2011 FrankNotesComputerscurrent IP-addressfor fb2 from outside is
131.215.114.84
  
  461   Tue Feb 1 19:26:47 2011 FrankNotesBEATloss of RF cablesfound a nice calculator here:
http://vk1od.net/calc/tl/tllc.php
which has a huge amount of different
  
  462   Tue Feb 1 20:47:14 2011 FrankNotesDAQVCO feedback signal now recordingadded the VCO feedback signal to the FB.
We had it connected but not written into
the frames so far
  
  464   Tue Feb 1 23:16:10 2011 FrankHowToElectronics EquipmentTF (attenuation) of 500ft of RG58 I've measured the TF of 500ft of RG58C/U
cable to see if the loss is about the same
calculated by that piece of software i've
 P1700783.JPGTF_500ft_RG58CU.png 
  469   Thu Feb 3 14:25:18 2011 FrankSummaryBEATFrequency counter time series2 stretches of data taken at the following
UTC times:
11/2/2 23:18:19  duration: ~9min
 frequcount_timeseries2.pngfreqcounter_timeseries.dat 
  470   Fri Feb 4 01:03:47 2011 FrankDailyProgressBEATcable delay setupchanged the frequency noise readout to
the cable-delay version to see how it works.
 cable-delay.png 
  471   Fri Feb 4 13:59:48 2011 FrankDailyProgressBEATtrend of the setup This setup has too much gain (i.e.
not enough range). Please
 Untitled.png 
  472   Fri Feb 4 19:26:50 2011 FrankDailyProgressBEATchanged to shorter cableexchanged the 500ft spool by a shorter
cable to get more range (but less resolution).
Due to the lower losses of the cable
  
  473   Sun Feb 6 02:38:07 2011 FrankDailyProgressRefCavboth cavities locked againlocked both cavities. Current slowdc value
is 0.1925. VCOmon is -2.2V. Changed RCtemp
to 35.00.
  
  474   Mon Feb 7 15:38:38 2011 FrankNotesBEATcable phase noise measurement stoppedstopped taking data for data calibration
at 11/02/07 23:35:00 UTC
  
  475   Mon Feb 7 16:14:19 2011 FrankNotesBEATcable phase noise measurement calibrationused two frequency ranges to calibrate
the mixer signal

    calibration factor is
  
  476   Mon Feb 7 18:13:31 2011 FrankSummaryVCOVCO tuning - fitted functiontried to fit  the tuning of the VCO
in order to calibrate the VCO tuning voltage
into frequency shift.
 vco-tuning_fit2.pngvco-tuning_fit1.png 
  477   Mon Feb 7 20:33:00 2011 FrankSummaryVCOcalibrated VCO monitor signal now availablechannel name is C3:PSL-ACAV_VCOMON_CAL, calibrated
in MHz using the fifth order polynomial equation
  
  478   Tue Feb 8 00:03:02 2011 FrankSummaryVCOcalibrated VCO monitor signal now fully availablethe configuration is currently running
with a softIOC in /caltech/target/SoftIOC/
  
  480   Tue Feb 8 10:41:59 2011 FrankSummaryBEATcavity drift within 24hi analyzed  the data taken with the
short cable and compared it to the signal
from the tuning input to the VCO.
 cavity-drift.png 
  482   Tue Feb 8 13:50:01 2011 FrankNotesRefCavplz no more temp servo tuning - want to take databy tuning the servo Tara unlocked both
cavities and they are out of range right
now, so plz no more temp servo tuning until
  
  485   Wed Feb 9 19:57:43 2011 FrankNotesBEATnew cable length - calibration datashorter cable: cable length 62 inches
amplified (DC-coupled) signal from
mixer using SR560, LP@30Hz, gain20 in channel
  
  486   Thu Feb 10 00:21:55 2011 FrankSummaryBEATcomparison VCO feedback signal and "cable technique"data taken at 02/06/2011 10:10:00 UTC,
duration = 24h
updated plots:
 6x 
  490   Thu Feb 10 16:45:32 2011 FrankSummaryElectronics Equipmentultra low-noise pre-ampssome old designs i've built some years
ago using the cheaper DIP versions of the
matched BJT pairs from Analog Devices.
 7x 
  492   Fri Feb 11 13:46:20 2011 FrankNotesBEATcalibrated error signal vs frequencyplots
are not taking the change of transmitted
PD power when changing VCO frequency into
 mixer_output.pngcalibrated_error_signal.png 
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