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ID Date Author Type Category Subjectup Text Attachments
  2403   Sat Dec 12 07:36:56 2009 ranaHowToElectronicsHow to Measure the Length of a Cable: InterferometryNeed to measure the length   
  2316   Mon Nov 23 19:36:28 2009 JenneUpdateAdaptive FilteringHow to add ASS channels, so that they're saved to frames[Jenne, Sanjit]
We would like several channels from
the OAF/ASS screen to be saved to frames,
  
  14371   Wed Dec 19 22:11:28 2018 KojiUpdateGeneralHow to align the copper OMCThe OMC input optics layout is attached

Checked the spot position on OMMT-FM1.
It was off from the center. This was causing
 110804_40m_OMC_layout.pdfOMC_alignment.pdf 
  16158   Mon May 24 20:55:00 2021 KojiSummaryBHDHow to align two OMCs on the BHD platform?Differential
misalignment of the OMCs

40m BHD will employ two OMCs on
  
  8265   Sun Mar 10 13:29:29 2013 KojiHowToIOOHow to calculate the accumulated round-trip Gouy phaseHow to calculate the accumulated round-trip
Gouy phase (and namely the transverse mode
spacing) of a general cavity
  
  13869   Sun May 20 17:43:01 2018 ranaUpdateElectronicsHow to choose resistorsArticle
from EE Times, describing why metal foil
(NOT metal film) resistors are really better
  
  6637   Thu May 10 14:49:06 2012 KojiHowToGeneralHow to clean & bake black glass pieces    
  966   Thu Sep 18 18:38:14 2008 YoichiHowToComputersHow to compile an SNL code for VxWorks Dave Barker guided me through how to compile
an SNL code into a Motorola 162 CPU object.
  
  11485   Thu Aug 6 21:03:45 2015 IgnacioHowToWienerFilteringHow to do online static IIR Wiener filteringIn order to do online static IIR Wiener
filtering one needs to do the following,

1) Get data for FIR Wiener filter
 iir.png 
  11273   Tue May 5 10:40:05 2015 ericqHowToComputer Scripts / ProgramsHow to get a web page running on NodusHow
to get your own web page running on
Nodus


  
  1550   Wed May 6 02:39:20 2009 YoichiHowToLockingHow to go to DC readoutI wrote a script called DC_readout, which
you can find in /cvs/cds/caltech/scripts/DRFPMI/bang/nospring/.
  
  11323   Sun May 24 14:45:02 2015 KojiHowToGeneralHow to launch StripTools at specified locationsLLO Operator Tips:

koji.arai@cr9:/opt/rtcds/userapps/trunk/asc/l1/scripts/initial_alignment$
cat autostart_strips.sh 
  
  3661   Wed Oct 6 15:56:14 2010 josephbHowToCDSHow to load matrices quickly and easilyAwhile ago I wrote several scripts for
reading in medm screen matrix settings and
then writing them out.  It was meant
  
  2938   Mon May 17 02:10:10 2010 KojiConfigurationIOOHow to lock / align the MCLet
me remind you how to lock and align the IMC
To lock
  
  847   Mon Aug 18 15:32:18 2008 josephbConfigurationCamerasHow to multicast with gstreamer and Gige CamerasIn order to get multicasting to work, one
simply needs to understand the address scheme.
  
  10515   Wed Sep 17 18:36:03 2014 KojiHowToGeneralHow to run DTT measurement automatically
    Suppose you have a dtt template
name test.xml
    The file test.dtt
    
  
  14865   Fri Sep 6 21:22:06 2019 KojiHowToCDSHow to save c1iooQ1 Can we run the machine with the reduced
# of cores?

Q2 We might be able to order them
  
  14866   Fri Sep 6 22:03:30 2019 aaronHowToCDSHow to save c1iooSaw these slightly delayed.

Q1: Not sure--is it a safe operation
for me to remove the DIMM on CPU0, replace
  
  14867   Mon Sep 9 11:36:48 2019 aaronHowToCDSHow to save c1iooOne pair of DIMM cards from the Sunstone
box had the same Sun part number as those
in c1ioo, so 
 reboot.png 
  14900   Thu Sep 19 15:59:29 2019 aaronHowToCDSHow to save c1iooNew DIMM cards have arrived. I stored them
in the digital cabinet along y arm.
  
  11399   Thu Jul 9 16:39:03 2015 KojiConfigurationGeneralHow to set up your own summary page environment on the LDG clusterHere is the summary of my investigation
how to set up my own "summary page"
environment on the LDG (LIGO Data Grid) cluster.
  
  11405   Mon Jul 13 18:27:27 2015 EveConfigurationGeneralHow to set up your own summary page environment on the LDG clusterI'd like to build off of Koji's
instructions with a few useful tips I discovered
while setting up my own summary page
  
  3658   Wed Oct 6 11:03:51 2010 josephb, yutaHowToCDSHow to start diaggui for right nowI'm hoping to get a proper install this
week done, but for now, this a stop gap.
To start diagnostic test tools, go
  
  2867   Sun May 2 17:16:43 2010 KojiUpdateSUSHow to steer the incident beam to the MC?Deviations of the MC spot from the center
of the mirrors were measured.
MC1H = +0.29 mm
 steering.png 
  2868   Mon May 3 00:36:49 2010 KojiUpdateSUSHow to steer the incident beam to the MC?Actually, I tried some tweaks of the input
steering to get the  beam being more centered
on the MC mirrors on Saturday evening.
  
  3336   Fri Jul 30 17:54:55 2010 steveHowToVACHow to stop and start slow pumpdown


   
        
            
  
  3338   Fri Jul 30 22:07:42 2010 KojiHowToVACHow to stop and start slow pumpdownKiwamu and Koji
The rough pumping was stopped at
230mmTorr. We are going to resume the pumping
  
  16413   Tue Oct 19 11:30:39 2021 KojiUpdateVACHow to vent TP1I learned that TP1 was vented through the
RGA room in the past. This can be done by
opening VM2 and a manual valve ("needle
 Screen_Shot_2021-10-18_at_14.52.34.png 
  16418   Wed Oct 20 15:58:27 2021 KojiUpdateVACHow to vent TP1Probably the hard disk of c0rga is dead.
I'll follow up in this elog later today.

Looking at the log in /opt/rtcds/caltech/c1/scripts/RGA/logs
  
  11138   Thu Mar 12 19:54:31 2015 Q UpdateLSCHow to: PRYQ doesn't like elogging, but he sent
me this nice detailed email, so I'm copying
it into the log:
  
  6185   Wed Jan 11 14:06:28 2012 Leo SingerHowToComputer Scripts / ProgramsHowTo for getting data from NDS off site This may or may not be general knowledge
already, but Jamie and I added a HowTo explaining
how to retrieve channel data from the frame
  
  13606   Mon Feb 5 14:11:01 2018 gautamUpdateALSHuge harmonics in ALS channelsI've been trying to setup for the THD
measuremetn at the LSC rack for a couple
of days now, but am plagued by a problem
 ALSpowerlineHarmonics.pdf2A1B3AC4-4059-416A-AD88-8AB0431D7A55.jpeg 
  13608   Mon Feb 5 22:57:28 2018 gautamUpdateALSHuge harmonics in ALS channelsDid some quick additional checks to figure
out what's going on here.


The SOS/dewhite board for
  
  7989   Sun Feb 3 13:20:02 2013 KojiSummaryGeneralHypothesisRana mentioned the possibility that the
PR2 curvature makes the impact on the mode
stability. Entry
 mode_density_PRC.pdfmode_density_PRC.zip 
  7992   Mon Feb 4 15:06:56 2013 KojiSummaryGeneralHypothesis

    

       
            
  
  6479   Tue Apr 3 12:42:19 2012 Mike J.UpdateComputersHysteresis ModelHere's my first hysteresis model in Simulink.
It's based on the equation y=Amplitude*sin(frequency*t+phase)+(hysteresis/frequency2)
as a solution to y''+frequency2*y+hysteresis=0.
 hysteresis1.mdl 
  6487   Thu Apr 5 01:07:08 2012 Mike J.UpdateComputersHysteresis PlotsHere are the hysteresis plots from the
most recent
model, which uses a modified harmonic
 SHO_hyst_plot.png 
  1314   Mon Feb 16 22:58:51 2009 rana, yoichiConfigurationSUSHysteresis in SUS from MisalignmentsWE wondered if there was some hysteresis in
the SUS alignments. When we leave the optics
misaligned for a
 a.png 
  6142   Wed Dec 21 14:23:08 2011 ranaConfigurationSUSHysteresis in suspensions?While discussing the suspension hysteresis
measurements, Koji, Kiwamu, and I realized
that the suspension wire standoff is aluminum,
  
  6128   Sat Dec 17 01:56:16 2011 KojiSummarySUSHysteresis test[Koji Kiwamu]
We wonder if the flakiness of MC2
comes from the suspension or not.
  
  72   Tue Nov 6 18:18:15 2007 tobinConfigurationComputersI broke (and fixed) conloggerIt turns out that not only restart_conlogger,
but also conlogger itself checks to see that
it is running on the right machine.  I had
  
  17106   Thu Aug 25 16:39:31 2022 CiciUpdateGeneralI have learned the absolute basics of githubI have now added code/data to my github
repository. (it's the little victories)
  
  4525   Thu Apr 14 17:45:59 2011 BryanConfigurationGreen LockingI leave you with these messages...OK…
the Y-arm may be locked with green light,
which was the goal, and this is all good
  
  4532   Fri Apr 15 13:43:23 2011 BryanConfigurationGreen LockingI leave you with these messages...Y-end PDH electronics.  Y_End_Electronics_TF.png 
  1707   Sat Jun 27 02:48:09 2009 ClaraUpdatePEMI moved accelerometers and made some pretty picturesI have been working on finding the best
spots to put the accelerometer sets in order
to best subtract out noise (seismometers
 6x 
  4998   Wed Jul 20 11:13:59 2011 Larisa ThorneUpdateelogI restarted the ELOG as it seemed to have crashed 
  
  4872   Thu Jun 23 22:59:45 2011 kiwamuUpdateABSLI-P curve of LWE The  IP_curve_small.png 
  4877   Fri Jun 24 07:49:23 2011 steveUpdateABSLI-P curve of LWE with serial numbers

    

       
            
  
  4840   Mon Jun 20 11:38:49 2011 kiwamuUpdateABSLI-P curve of LightWave M126-1064-700The
I-P curve of the LightWave NPRO (M126-1064-700),
which was taken out from the MOPA box, was
 IP_curve.png 
  4841   Mon Jun 20 13:48:25 2011 KojiUpdateABSLI-P curve of LightWave M126-1064-700Hmm. Was the current within the operating
range? (i.e. Is it a 700mW laser or a 1W
one?)
  
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