40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 340 of 344  Not logged in ELOG logo
ID Date Author Type Category Subjectdown Text Attachments
  2395   Fri Dec 11 09:30:09 2009 KojiConfigurationLSC166 LO DisconnectedThey
must not be dBm, must be dB 

  
  2396   Fri Dec 11 11:42:26 2009 AlbertoConfigurationLSC166 LO Disconnected


   
        
            
  
  2398   Fri Dec 11 14:12:32 2009 ranaConfigurationLSC166 LO Disconnected 
 Seems like very strange cable
loss numbers. The Heliax is lossier than
  
  2402   Fri Dec 11 19:51:13 2009 AlbertoConfigurationLSC166 LO Disconnected


   
        
            
  
  12948   Wed Apr 19 15:46:24 2017 gautamUpdateGeneral1611/1811 inventory checkI looked through the lab area to do a fast
photodiode inventory check, as we may need
to buy some for the higher order mode spectroscopy
  
  4351   Thu Feb 24 17:42:00 2011 AidanUpdateGreen Locking15% of end laser sideband power transmitted through cavityI did a quick calculation to determine
the amount of sideband transmission through
the FP cavity.
  
  9618   Mon Feb 10 18:03:41 2014 jamieUpdateCDS12 core c1sus replacementI have configured one of the spare Supermicro
X8DTU-F chassis as a dual-CPU, 12-core CDS
front end machine.  This is meant to
  
  7513   Tue Oct 9 23:12:56 2012 JenneUpdateLSC11MHz reconnected to EOMRiju hasn't been in the lab in a long time
to do any measurements, so I put the signals
back to how they should be.  
  
  4530   Fri Apr 15 12:17:39 2011 kiwamuUpdateLSC11MHz demod board : funny I-Q phaseDuring checking
the 11MHz demod boards I found that the I-Q
 relativephase.png 
  4533   Fri Apr 15 15:15:08 2011 kiwamuUpdateLSC11MHz demod board : 90 degree splitter[Rana, Koji, Kiwamu]
 Moreover
the amplitude of the I and Q signals are
  
  4537   Sat Apr 16 02:00:14 2011 ranaUpdateLSC11MHz demod board : 90 degree splitterOne way to avoid some of the bad stuff
in there is to take the 1 dBm input and amplify
it to ~21 dBm before splitting and sending
  
  2657   Thu Mar 4 22:07:21 2010 ranaUpdate40m Upgrading11MHz PD not yet designedUse 10 Ohms for the resistance - I have
never seen a diode with 25 Ohms.
p.s. PDFs can be joined together
  
  2656   Thu Mar 4 19:53:56 2010 AlbertoUpdate40m Upgrading11MHz PD designed adjusted for diode's resistance; 55 MHz RFPD designedAfter
reading this study done
 6x 
  6590   Mon Apr 30 22:58:57 2012 JenneUpdateElectronics11MHz Marconi set to default after power outageAfter a power outage, a Marconi comes back
to it's defaults.  It needed to be reset
to the values in elog 5530. 
  
  11230   Tue Apr 21 11:55:05 2015 SteveUpdateOptical Levers1103P noise measurementManasa and Steve,

Is this what you want?  Dashed
lines are dark.
 1103P@qpdBS.jpgoplev1103P.pngoplevSum1103Pbs.png 
  11231   Tue Apr 21 15:03:27 2015 ranaUpdateOptical Levers1103P noise measurementIt doesn't work with the lens in there,
but it seems pretty close. Please leave it
as is and I'll play with it after 5 today.
  
  11232   Tue Apr 21 21:46:34 2015 ranaUpdateOptical Levers1103P noise measurementTo test what the inherent angular noise
of the HeNe 1103P laser is, we're testing
it on a table pointing into the BS OL QPD
 oplev1103P.pngL1-ISI_SUS_ODC_FC496F_SPECTRUM-1113523216-86400.png 
  9072   Tue Aug 27 18:21:35 2013 JenneConfigurationElectronics110 MHz LO optionsAs I see it, we have a few options for
getting the 110 MHz LO to both the POP110
and AS110 demod boards.  
  
  9073   Tue Aug 27 18:58:52 2013 KojiConfigurationElectronics110 MHz LO options- Do we have an appropriate amplifier?
- True challenge could be to find
a feedthrough for the new port. (or to find
  
  7360   Fri Sep 7 12:28:09 2012 KojiUpdateLSC11&55MHz modulations turned off11MHz modulation source was turned off
(disabled) at Marconi at 12:00.
  
  845   Mon Aug 18 09:19:55 2008 steveSummaryVAC11 days at atmIt took 11 days to fix earth quake triggered
sus problems of ITMX, SRM and PRM
Only ITMX north and BSC north vac doors were
 ventprm.jpg 
  7515   Wed Oct 10 02:15:14 2012 ranaUpdateLSC11 MHz reconnected to EOM Absolutely hokey. What are
our requirements for this RFPD? What
are the power levels and SNR that we want
  
  2653   Wed Mar 3 18:32:25 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics** Please
add LISO file w/ component values.
 
 rfpd11_v2_TF.pdfrfpd11_v2_Noise.pdf 
  2655   Thu Mar 4 08:43:35 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics


   
        
            
 rfpd11_v2.fil 
  12949   Fri Apr 21 13:59:47 2017 Eric GustafsonSummary 1064 nm Semiconductor Laser Fiber Distribution System and Mirror Tomography1064 nm Semiconductor Laser Fiber
Distribution System and Mirror Tomography

Below threshold these Semiconductor
  
  9253   Fri Oct 18 08:12:08 2013 SteveUpdatePEM1000 days trends   trend1000days.png 
  1640   Mon Jun 1 19:19:26 2009 ranaUpdatePSL1000 days of hour-trend   u.png 
  9482   Tue Dec 17 20:59:23 2013 JenneUpdateLSC1/sqrt(TR) signals added to framesI noticed that we have not been saving
the 1/sqrt(TRX) and 1/sqrt(TRY) data, so
I modified the c1lsc model and added them
  
  3171   Wed Jul 7 19:41:27 2010 JenneUpdateSUS1.5 more ECD sets suspended for tip tilts[Jenne, Kyung Ha]
We made some good progress on suspending
the Tip Tilt ECDs today.  We finished
 ECDbackplane_blackdump_small.jpgECDbackplane_foil_small.jpg 
  8008   Wed Feb 6 14:51:25 2013 JenneUpdateElectronics1 power supply replaced!

    

       
            
  
  6496   Fri Apr 6 15:06:05 2012 DenUpdateIOO1 Hz resonanceI think we can try to damp 1 Hz resonance
more. In September it was not seen because
of the digital noise. After we've figured
 psd_mcl.jpgmcl.jpg 
  7234   Mon Aug 20 13:02:57 2012 DenUpdateAdaptive Filtering1 Hz resonanceStatic filter was adjusted to filter 1
Hz resonance in MCL and it could do it. Stack
is not great in this experiment due to the
 1hz.png 
  11986   Thu Feb 11 14:28:50 2016 SteveUpdateTreasure091415 declared  
Beautifully Done

  
 091415declared.jpgYou_were_right!.jpgP1080312.JPG 
  9042   Tue Aug 20 16:23:41 2013 ranaSummaryGeneral/home/cds nearly full/home/cds is >98% full - below are some
of the usage numbers:
  
  9045   Wed Aug 21 17:42:03 2013 ranaSummaryGeneral/home/cds nearly fullOne of the reasons that our disk is getting
full is due to the scripts_archive directory.
A backup script runs on op340m and makes
  
  9147   Fri Sep 20 20:14:52 2013 ranaSummaryGeneral/home/cds nearly full

    

       
            
  
  9535   Tue Jan 7 23:50:27 2014 jamieUpdateCDS/frames space cleared up, daqd stabilizedThe wiper script is done and deleted a
whole bunch of stuff to clean up some space:

controls@fb ~ 0$ /opt/rtcds/caltech/c1/target/fb/wiper.pl
  
  9949   Tue May 13 17:45:21 2014 ranaUpdateCDS/frames space cleared up, daqd stabilized 
 Late last night we were getting
some problems with DAQD again. Turned out
  
  9955   Thu May 15 01:42:07 2014 ranaUpdateCDS/frames space cleared up, daqd stabilized Script seems to be working now:
nodus:~>df -h | grep
frames
  
  9531   Tue Jan 7 23:08:01 2014 jamieUpdateCDS/frames is full, causing daqd to die


   
        
            
  
  9533   Tue Jan 7 23:13:47 2014 jamieUpdateCDS/frames is full, causing daqd to die


   
        
            
  
  12796   Fri Feb 3 11:40:34 2017 ericqSummaryCDS/cvs/cds/caltech/chans back on svn1.6I was able to bring back svn 1.6 formatting
to /cvs/cds/caltech/chans by doing the following
on nodus:
  
  12797   Sat Feb 4 12:00:59 2017 ranaSummaryCDS/cvs/cds/caltech/chans back on svn1.6True - its an issue. Koji and I are updating
zita into Ubuntu16 LTS. If it looks like
its OK with various tools we'll swap
  
  12798   Sat Feb 4 12:20:39 2017 jamieSummaryCDS/cvs/cds/caltech/chans back on svn1.6


  
  12799   Sat Feb 4 12:29:20 2017 jamieSummaryCDS/cvs/cds/caltech/chans back on svn1.6No, not confused on that point. We just
will not be testing OS versions at the 40m
or running multiple OS's on our workstations.
  
  12800   Sat Feb 4 12:50:01 2017 jamieSummaryCDS/cvs/cds/caltech/chans back on svn1.6


  
  12914   Tue Mar 28 21:06:53 2017 ranaSummaryCDS/cvs/cds/caltech/chans back on svn1.6Debian doesn't like EPICS. Or our XY
plots of beam spots...Sad!

 Screenshot-Untitled_Window.png 
  1059   Mon Oct 20 15:02:00 2008 YoichiConfigurationComputers/cvs/cds restoredI moved missing files in /cvs/cds restored
by Alan and Stuart to the original locations.
I confirmed autoburt runs, and dtt, which
  
  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
  
  13929   Thu Jun 7 20:21:15 2018 KojiUpdateComputer Scripts / Programs/cvs/cds Backup in dangerLocal
backup on chiara seems not
  
ELOG V3.1.3-