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  40m Log, Page 334 of 337  Not logged in ELOG logo
ID Date Authordown Type Category Subject Text Attachments
  3368   Thu Aug 5 16:18:37 2010 AlastairUpdateGeneralclocks still not locked fully - hut removedThe rubidium clocks are still not quite
locked together, though it is clear that
the beat frequency has dropped a lot since
  
  3433   Wed Aug 18 12:02:29 2010 AlastairConfigurationComputerselog had crashed again......I restarted it.   
  3441   Thu Aug 19 09:52:51 2010 AlastairUpdateComputersElog down I restarted it using start-elog-nodus
and this worked out fine - even though I
did it from Pete's on my phone ;-)
  
  3442   Thu Aug 19 11:38:48 2010 AlastairUpdateComputersATF wikiThe ATF wiki page doesn't seem to be working
any more.  Does anyone know where this
is held so we can try to get it back online? 
  
  3443   Thu Aug 19 12:06:07 2010 AlastairUpdateComputersATF wiki


   
        
            
  
  3452   Fri Aug 20 20:36:05 2010 AlastairUpdateGeneralElog Elog was down, I restarted it.   
  3461   Tue Aug 24 06:34:01 2010 AlastairUpdateGeneralElog......was down.  Have restarted it.   
  3475   Fri Aug 27 07:21:13 2010 AlastairUpdateGeneralelog... was down.  I restarted the version
in the 2.7.5 folder.  It went down again
almost immediately but stayed up after the
  
  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 
  4566   Mon Apr 25 12:55:35 2011 AlastairBureaucracyComputerswiki?


   
        
            
  
  4897   Tue Jun 28 11:25:56 2011 AlastairBureaucracyComputersrestarted elogThe manual instructions on the 40m wiki
for restarting wouldn't work.  I killed
the process okay, but then I got an error
  
  306   Sun Feb 10 20:47:01 2008 AlanSummarySUSAll watchdogs trippedA moderate earthquake occurred at 11:12:06
PM (PST) on Friday, February 8, 2008.
The magnitude 5.1 event occurred 21 km (13
  
  1058   Mon Oct 20 12:18:38 2008 AlanUpdateComputer Scripts / Programsburtwb missing on Solaris but installed on linux64[quote]c1lsc stalled this evening, so I powercycled
it.
After that, I tried to lock arms to confirm
  
  1060   Mon Oct 20 16:18:00 2008 AlanConfigurationComputers/cvs/cds restored[quote]I moved missing files in /cvs/cds restored
by Alan and Stuart to the original locations.
I confirmed autoburt runs, and dtt, which
  
  1215   Sun Jan 4 13:17:23 2009 AlanOmnistructureComputer Scripts / ProgramsNew 40mWebStatusI have set up some code in /cvs/cds/caltech/scripts/webStatus
along with a cronjob on controls@nodus to
generate a webStatus every half hour, at
  
  1216   Mon Jan 5 11:21:05 2009 AlanOmnistructureComputer Scripts / ProgramsNew 40mWebStatus[quote]
I guess we need some kind of "official" crontab
file for controls@nodus so that we know how/where
  
  1372   Mon Mar 9 10:59:05 2009 AlanOmnistructureComputersssh agent on fb40m restarted for backupAfter the boot-fest, the nightly backup
to Powell-Booth failed, and an automatic
email got sent to me. I restarted the ssh
  
  1564   Fri May 8 10:05:40 2009 AlanOmnistructureComputersRestarted backup since fb40m was rebootedRestarted backup since fb40m was rebooted.   
  1756   Thu Jul 16 09:49:52 2009 AlanUpdateComputersfb40m


   
        
            
  
  1910   Sat Aug 15 10:36:02 2009 AlanHowToComputersnodus boot procedure[quote]The restart procedures for the various
processes running on nodus are explained
here:
  
  2445   Tue Dec 22 13:14:37 2009 AlanOmnistructurePEMmiracle in the 40m


   
        
            
  
  10020   Tue Jun 10 12:49:46 2014 AkhilUpdateComputer Scripts / ProgramsInterfacing UFC-6000 with Raspberry Pi completed Goal:
 To interface the Mini Circuits
RF Frequency Counter(FC) Model UFC-6000 with
 Interfacing_Script.zip 
  10036   Fri Jun 13 11:33:55 2014 AkhilUpdateElectronicsCharacterization of UFC-6000 RF Frequency Counter Goal:
To characterize the Mini-Circuits
RF FC (Model UFC-6000) and plot Bode Plots
 Bode_Plots.zip 
  10070   Thu Jun 19 12:10:18 2014 AkhilUpdateElectronicsGain plots to Characterize UFC-6000 RF Frequency CounterThe
goal is to characterize the Mini-Circuits
RF FC (Model UFC-6000)  by plotting
 GainVsFreq.png 
  10096   Wed Jun 25 01:18:24 2014 AkhilUpdateelogWeekly Update Plans
for the Week:

    Phase and noise characterization
  
  10104   Wed Jun 25 19:29:19 2014 AkhilUpdateElectronicsAnalog-to-Digital Converter I have been trying to use an ADC
with the Raspberry Pi to be able to measure
the phase difference between FC input and
 IMG_1496.png 
  10107   Fri Jun 27 12:54:13 2014 AkhilUpdateElectronicsGain plots of UFC-6000 for 0.1s Sampling Rate  Finally, the 0.1s sampling rate of
the frequency counter(FC) has been achieved.
For this I had to :
 Sampling-0.1s.pdf12.png 
  10118   Tue Jul 1 21:20:37 2014 AkhilUpdateElectronicsGain plots of UFC-6000 for 0.1s Sampling Rate  The attached are the gain plots at
carrier frequencies of 100 MHz, 500 MHz and
1 GHz measured using IFR 2023B (Marconi).
 gain.pnggain.pdf 
  10129   Fri Jul 4 09:17:13 2014 AkhilConfigurationElectronicsSetup Used for Characterization of Frequency Counter Goal:
To
 setup.pdf 
  10137   Mon Jul 7 13:56:13 2014 AkhilConfigurationElectronicsSetup Used for Characterization of Frequency CounterWhen I was trying to plot PSD of the measurements,
I still couldn't get better resolution. There
still seems to be a problem with timing and
 FreqVsTime.pngMissing_Data.png 
  10151   Tue Jul 8 09:02:02 2014 AkhilUpdateElectronicsPSD Plots for different sampling times of the Frequency Counter Although there were few timing issues
with the FC and the Raspberry Pi at the lowest
sampling time of the FC (0.1s) even after
 7x 
  10161   Wed Jul 9 08:50:30 2014 AkhilUpdateGeneralWeekly Update 
Last
Week's Work
  
  10163   Wed Jul 9 12:01:43 2014 AkhilConfigurationElectronicsSetup Plan for placing the Frequency Counter inside the labToday, me and Manasa went inside the lab
to figure out a place for the place for the
FC. The whole setup will be placed in a chassis
 setup.pngSetupFC.png 
  10178   Thu Jul 10 17:53:19 2014 AkhilConfigurationComputer Scripts / ProgramsEPICS installed on Raspberry Pi I finished the installation of EPICS   
  10193   Mon Jul 14 13:03:23 2014 AkhilSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedMain
Problem:
The frequency counter (FC) takes
 0.2timinganalysis.png0.3timinganalysis.png0.5timinganalysis.png1stiminganalysis.pngpdf.zip 
  10199   Tue Jul 15 01:31:13 2014 AkhilSummaryElectronicsTiming Issues of Mini Circuits UFC-6000: SolvedThe attached are the PSD plots with improved
FC timing(with the same code as in http://nodus.ligo.caltech.edu:8080/40m/10151).
More plots(Phase and PSD) to follow.
 qnoise.pngqnoise.pdf 
  10215   Wed Jul 16 07:51:52 2014 AkhilUpdateGeneralWeekly UpdateWork
Done:

    Solved all the timing
  
  10222   Wed Jul 16 22:17:40 2014 AkhilSummaryElectronicsBode Plots and complete Characterization of Frequency CounterGoal:
To estimate the transfer function
and the noise in the FC that is a part of
 Phase_Data.zipBode100MHz.png 
  10239   Fri Jul 18 19:32:50 2014 AkhilSummaryElectronicsFilters used inside the Frequency Counter 
 Thanks Koji , for your  hint
for the brain teasing puzzle. I was looking
 TheoreticalGainPlot.pngTFexpected.png 
  10246   Mon Jul 21 12:16:27 2014 AkhilSummaryElectronicsFilters used inside the Frequency CounterThe expected bode plots for such
a filter with L= 4 is attached and compared
 FC_TF_Characterization.png 
  10257   Tue Jul 22 23:10:12 2014 AkhilUpdateGeneralWeekly Update Work
Done
  
  10261   Wed Jul 23 11:15:54 2014 AkhilUpdateElectronicsInstallation of FCs in the 40m As a part of installation of two(X-ARM
and Y-ARM) frequency counters in the 40m,
I have tested their performance when using
 Timingwith2FCs.png 
  10272   Thu Jul 24 19:28:43 2014 AkhilUpdateGeneralThermal Actuator Transfer Functions As a part of temperature actuator
characterization, today Eric Q and I made
some measurements for the open loop TF of
 TF-X-ARM.pdfTF-Y-ARM.pdf 
  10274   Sat Jul 26 10:12:19 2014 AkhilUpdateGeneralData Acquisition from FC into EPICS Channels I succeeded in creating a new channel
access server hosted on domenica ( R Pi)
for continuous data acquisition from the
  
  10275   Sat Jul 26 13:10:14 2014 AkhilUpdateGeneralThermal Actuator Transfer FunctionsKoji said that the method we used for X-arm
thermal actuator TF measurement was not correct
and suggested us to make measurements separately
 TFX_new.pdf 
  10277   Sat Jul 26 14:35:28 2014 AkhilUpdateGeneralData Acquisition from FC into EPICS Channels

    

       
            
  
  10281   Mon Jul 28 16:34:02 2014 AkhilUpdateGeneralCalibration of measured Thermal Actuator TFs To calibrate the measured TFs and
characterize the thermal actuator for the
FOL loop, we [ Me, Eric Q, Koji ] made the
 mirrorTF2.pdf 
  10283   Mon Jul 28 17:53:00 2014 AkhilUpdateGeneralWork plan for the Upcoming weeks- FOL Project [Akhil, Harry]
Work
Completed
  
  10286   Tue Jul 29 18:00:20 2014 AkhilUpdateLSCCalibration of ETMX and ETMY actuatorsThe ultimate goal of characterizing the
temperature actuator turned to be fruitful
in obtaining the calibration values for ETMX
 PZT_ETMX_TF.pngPZT_ETMY_TF.pngPZT_ITMX_TF.pngPZT_ITMY_TF.png 
  10297   Wed Jul 30 11:15:44 2014 AkhilUpdateGeneralWeekly Update Plan for the week:

    PID loop design and testing
with the Green laser beat note by actuating
  
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