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  40m Log, Page 35 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  14881   Mon Sep 16 12:00:16 2019 aaronHowToGeneralMoved some immovable opticsWhen I put away the lenses we had used
for measuring the RF transfer functions of
the QPD heads, I saw that I'd removed
  
  14890   Tue Sep 17 14:43:59 2019 gautamHowToCDSFinal bit bug of the BIO CDS module Came across this while looking up the BIO
situation at 1Y2. For reference, the fix
Koji mentions can be seen in the attached
 Screen_Shot_2019-09-17_at_2.44.41_PM.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.
  
  15462   Thu Jul 9 16:02:33 2020 JonHowToCDSProcedure for setting up BHD front-endsHere is the procedure for setting up the
three new BHD front-ends (c1bhd, c1sus2,
c1ioo - replacement). This plan is based
  
  15760   Tue Jan 12 08:21:47 2021 anchalHowToCDSAcromag wiring investigationI used an Acromag XT1221 in CTN to play
around with different wiring and see what
works.  Following are my findings:
 SingleEndedNonFloatingWiring.pdfSingleEndedFloatingWiring.pdfDifferentialSignalWiring.pdf 
  15761   Tue Jan 12 11:42:38 2021 gautamHowToCDSAcromag wiring investigationThanks for the systematic effort.


Can you please post some
time domain plots (ndscope perferably or
  
  15762   Wed Jan 13 16:09:29 2021 AnchalHowToCDSAcromag wiring investigationI'm working on a better wiring diagram
that takes into account multiple power supplies,
how their GND is passed forward to the circuits
 SimpleTestsStriptoolImages.pdf 
  15778   Tue Jan 26 12:59:51 2021 AnchalHowToCDSAcromag wiring investigationTaking inspiration from SR785 on how it
reads differential signal, I figured that
acromag too always need a way to return current
 TestingDifferentialSignalWithFloatingRTNwrtIN-.pdf 
  15779   Tue Jan 26 15:37:25 2021 AnchalHowToCDSAcromag wiring investigationHere I present few wiring diagrams when
using Acromag to avoid noisy behavior and
ground loops.
 GeneralLabWiring.pdfGeneralLabWiring2.pdfGeneralLabWiring3.pdf 
  15785   Fri Jan 29 17:57:17 2021 AnchalHowToCDSAcromag wiring investigationI found a
white paper  from Acromag which
discusses how to read differential signal
 GeneralLabWiringDiffWith2Wires.pdfGeneralLabWiringDiffWith3Wires.pdfDiffReadResistorbtwnINandRTN.pdf 
  15857   Wed Mar 3 12:00:58 2021 Paco, AnchalHowToIMCMC_F ASD[Paco, Anchal]

- Saved BURT backup in /users/anchal/BURTsnaps/
- Copied existing code for mode cleaner
 20210303_MC_F_Spectrum.pdf20210303_MC_F_Spectrum.tar.gz 
  16085   Mon Apr 26 18:52:52 2021 Anchal, PacoHowToComputer Scripts / Programsawg free slotToday we had some trouble launching an
excitation on C1:IOO-MC_LSC_EXC from awggui.
The error read:
  
  16441   Sun Oct 31 14:21:31 2021 ranaHowToTreasureIFOCadIFOcad model/video of the AEI 10m interferometer:

https://10m.aei.mpg.de/design-and-sensitivity/
  
  16467   Tue Nov 16 11:37:26 2021 HangHowToSUSFitting suspension model--large systematic errorsOne goal of our sysID study is to improve
the aLIGO L2A feedforward. Our algorithm
currently improves only the statistical uncertainty
 L2L_L3P_fit.pdfL2L_L3P_residual.pdf 
  16486   Mon Nov 29 15:24:53 2021 HangHowToGeneralFisher matrix vs length of each FFT segmentWe have been discussing how does the parameter
estimation depends on the length per FFT
segment. In other words, after we collected
 setup.pdfFisher_vs_Tperseg.pdffisher_vs_mcmc_offset_removed.pngfisher_vs_mcmc.png 
  16980   Fri Jul 8 14:03:33 2022 JCHowToVACVacuum Preparation for Power Shutdown [Koji, JC]

Koji and I have prepared the vacuum
system for the power outage on Saturday.
 Screen_Shot_2022-07-12_at_7.02.14_AM.png 
  16985   Mon Jul 11 15:26:12 2022 JCHowToVACStartup after Power Outage[Koji, Jc]

Koji and I began starting that
Vacuum system up.
  
  16987   Mon Jul 11 17:41:52 2022 KojiHowToVACStartup after Power Outage- Once the FRG gauge readings are back
(see next elog by Tega), I could open V1
to pump down the main vacuum manifold.
 Screen_Shot_2022-07-11_at_18.13.00.png 
  17104   Thu Aug 25 15:24:06 2022 PacoHowToElectronicsRFSoC 2x2 board -- fandango[Paco, Chris Stoughton, Leo -- remote]

This morning Chris came over to
the 40m lab to help us get the RFSoC board
 adc0_1137MHz.pngadc1_1137MHz.pngrfdc_PLLsettings.pngclockingwiz_settings.pngblockIPdiag.png 
  17194   Mon Oct 17 17:42:35 2022 JCHowToOPLEV TablesIMC Reflected beam sketchI sketched up a quick drawing with estimated
length for the IMC reflected beam. This includes
the distances and focal length. Distances
 Screenshot_2022-10-18_093033.png 
  17277   Thu Nov 17 11:24:39 2022 JCHowToLSCLocking MICH[Yuta, JC]

Here is the Yuta's Alignment
Scheme from elog
  
  17321   Tue Nov 29 11:38:37 2022 JCHowToLSCLock Single Arm After MICH lockI tried locking single arm this morning,
but I was unable to because the triggers
were set to lock strictly to MICH. Anchal
 Screen_Shot_2022-11-29_at_11.01.56_AM.png 
  131   Wed Nov 28 16:18:15 2007 AlbertoMetaphysicsEnvironmentso clean you can eat on itI tidied up the desks in the lab, brought
the Spectrum Analyzers back to the Salumeria
(you don't want to know about that), sorted
 DSC_0180.JPGDSC_0181.JPG 
  180   Fri Dec 7 14:14:48 2007 robMetaphysicsComputer Scripts / Programstdsread problems on Solaris
[COLOR=darkblue]tdsread[/COLOR] has developed
a strange new illness, whereby it cannot
  
  277   Sun Jan 27 13:13:21 2008 tobinMetaphysicsGeneraldepartureIt's been grand.  Thanks for having me!

GWAVES IN '08!
  
  374   Thu Mar 13 03:07:19 2008 LisaMetaphysicsEnvironmentCoolness at the 40mMy first (and hopefully not last) week at
the [COLOR=orange]40m lab[/COLOR] is ending
:(
  
  438   Tue Apr 22 22:19:02 2008 robMetaphysicslorejiggling sliders
In the interests of tacit communication of
scientific knowledge, I here reveal a nugget
  
  652   Wed Jul 9 15:04:22 2008 steveMetaphysicsPhotosSURFs helping handsSurf students are helping out with baffle
cleaning.
 surfjob.png 
  657   Thu Jul 10 23:27:57 2008 JohnMetaphysicsCamerasSecret handshakesRob and I have joined the ranks of the illuminati
and exercised our power.
  
  658   Fri Jul 11 00:30:24 2008 robMetaphysicsComputersstrange SUS controllers
[I]rob, johnnie[B]M[/B][/I]
  
  716   Tue Jul 22 16:50:09 2008 steveMetaphysicsEnvironmentprofessorial clean up of work benchAtm1: is showing the spiritual satisfaction
after work bench clean up by the professor
himself.
 ranaclup.pngcleanup2.png 
  1025   Fri Oct 3 19:38:02 2008 robMetaphysicsEnvironmentThe Gatekeeper
Found this lady outside the door of the 40m
lab a few nights ago.
 DSC_0409.JPG 
  1026   Sat Oct 4 07:23:42 2008 KojiMetaphysicsEnvironmentThe GatekeeperHi, this is Koji from Japan.

I am afraid that this is a poisonous spider,
  
  1076   Thu Oct 23 18:51:19 2008 AlbertoMetaphysicsComputerseLogI checked it and the latest version of the
elog software, the 2.7.5 (we have the 2.6.5)
has, among new nice features, the very good
  
  2228   Tue Nov 10 17:49:20 2009 AlbertoMetaphysicsComputersTest Point Number MappingI found this interesting entry by Rana
in the old (deprecated) elog : here
I wonder if Rolf has ever written
  
  2439   Mon Dec 21 08:16:54 2009 steveMetaphysicsPEMjackhammering next doorAt ITMX, on the CES side, 5 Ft  from
the wall the jackhammer is on. The susses
are holding well.
  
  2489   Fri Jan 8 18:20:12 2010 steveMetaphysicsTreasureRob now can concentrate on his thesisWe are celebrating Rob's promotion to thesis
poetry.  These pictures were taken on
December 9, 2009
 rob2.JPGrob3.JPGrob1.JPG 
  2667   Thu Mar 11 15:24:51 2010 steveMetaphysicsEnvironmentIFO was well protected

    
        
  
  2763   Sun Apr 4 17:32:07 2010 AlbertoMetaphysicsGeneralnew y-arm?


   
        
            
  
  3592   Tue Sep 21 15:33:02 2010 steveMetaphysicsTreasureWagonga alartJohn Miller has arrived from Australia
with 3 bags of  Wagonga Coffee. Trade
bargaining has started on
 P1060866.JPGP1060872.JPG 
  3751   Thu Oct 21 10:44:56 2010 steveMetaphysicsTreasure1987 supernova tapes plus....?I'm cleaning out to make room for our new
optical cabinet. Are we keeping these? There
are  ~20  pieces of 10" od
 P1060932.JPG 
  4257   Mon Feb 7 19:21:32 2011 Beard PapaMetaphysicsPhotosThe Adventures of Dr Stochino and Beard Papa    
  4653   Fri May 6 15:42:55 2011 valeraMetaphysicsIOOInput mode cleaner length and 11 MHz modulation frequency After Kiwamu set the REFL11 phases
in the PRMI configuration (maximized PRM->REFL11I
reesponse) I tried to measure the MC length
  
  4978   Fri Jul 15 19:00:18 2011 dmassMetaphysicselogCrashesElog crashed a couple times, restarted
it a couple times.
  
  5128   Fri Aug 5 20:44:26 2011 jamieMetaphysicsTreasureFilm crew here Monday morningJust a reminder that a film crew will
be here Monday morning, filming Christian
Ott for some Discovery channel show.
  
  5129   Fri Aug 5 22:54:29 2011 kiwamuMetaphysicsTreasureCrane crew here Monday morningAlso, according to Steve, there will be some
crane guys for fixing the Y end crane issue
  
  5139   Mon Aug 8 13:24:00 2011 steveMetaphysicsTreasure Monday morning

    

       
            
 P1080147.JPG 
  5750   Fri Oct 28 02:41:18 2011 SureshMetaphysicselogelog unresponsive: restartedElog did not respond despite running the
/cvs/cds/caltech/elog/start-elog.csh 
script two times.  
  
  6059   Thu Dec 1 12:27:51 2011 ZachMetaphysicsRF SystemRAM diagnosis/suppression plan?It seems like there is some confusion---or
disagreement---amongst the lab about how
  
  6069   Mon Dec 5 09:46:21 2011 ZachMetaphysicsRF SystemRAM diagnosis/suppression plan?Since no
one has made any comments
  
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