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  40m Log, Page 327 of 346  Not logged in ELOG logo
ID Date Authordown Type Category Subject Text Attachments
  424   Thu Apr 17 20:17:37 2008 AndreyUpdatePEMTwo issues with our weather station
I encountered two difficulties working with
the "Weather Station".
  
  427   Fri Apr 18 16:48:13 2008 AndreyUpdatePEMRain collector of weather station
Today the rain collector of our weather station
was cleaned. As a result, we checked that
 DSC_0520--before.JPGDSC_0537--after.JPG 
  440   Wed Apr 23 22:39:54 2008 AndreyDAQComputer Scripts / ProgramsProblem with "get_data" and slow PEM channels
It turns out that I cannot read minute trends
for the slow weather channels for more than
  
  444   Thu Apr 24 22:06:47 2008 AndreySummaryComputersEthernet Cables and HubsToday in the morning (between 8.30AM and noon)
Joe and I were working on understanding which
ethernet cables connect "processors controlling
  
  447   Fri Apr 25 11:33:40 2008 AndreyConfigurationComputersComputer controlling vaccum equipment
[COLOR=blue]Old computer[/COLOR] (located
in the south-end end of the interferometer
  
  448   Fri Apr 25 13:20:04 2008 AndreyUpdatePEMMicrophone testIn response to Rana's request, I tested the
microphone (if it is alive or not) by clapping
my hands and speaking aloud nearby.
 Microphone.png 
  452   Sat Apr 26 01:45:38 2008 AndreySummaryPEMWeather Station enhancementTwo more things concerning weather monitoring
have been done during this week.
 Matlab_Weather_Trends.png 
  458   Mon Apr 28 23:44:33 2008 AndreyUpdateComputer Scripts / ProgramsWeather.db
I was trying to figure out how to modify
the file "Weather.db" so that the atm.pressure
  
  460   Tue Apr 29 21:30:49 2008 AndreyUpdatePEMIn the process of renaming channels for Weather Station
I startted renaming channels for the weather
station, and I will continue this tomorrow,
  
  461   Wed Apr 30 20:48:58 2008 AndreySummaryPEMNew Weather Channels
I created the new channels for the weather
station, all letters are capital ones. They
 April30-5hours.png 
  476   Wed May 14 13:14:19 2008 AndreySummaryComputersReflective Memory Network is restored
[COLOR=blue]Reflective Memory Network is
restored, all watchdogs and oplevs are returned
  
  477   Wed May 14 14:05:40 2008 AndreyUpdateComputersComputer Linux-2, MEDM screen "Watchdogs"
Computer "Linux-2", MEDM screen "C1SUS_Watchdogs.adl":
there is no indication for ETMY watchdogs,
  
  483   Fri May 16 17:27:55 2008 AndreyOmnistructureGeneralToilets are broken, do not use them !!!
[COLOR=red][SIZE=4] Both toilets in 40-meter
were constantly flushing, the leaking water
  
  512   Tue Jun 3 02:15:29 2008 AndreySummaryCamerasFitting results
There have been a lot of work going on related
to the processing of images captured by the
 May30-GC650.pdfMay30-GC750.pdfJune02-GC650.pdfJune02-GC750.pdf 
  515   Tue Jun 3 12:33:36 2008 AndreyUpdateCamerasAndrey, Josephb
Continuing our work with cameras,
  
  10101   Wed Jun 25 14:52:22 2014 Andres MedinaUpdateelogPlacing a lens between the steering mirrors and another lens between the second steering mirror and the cavity I was asked to calculate the lenses
that we need in order to obtained a Gouy
phase close to 90 degrees between the two
 SchematicForXendGreenGoingToTheCavity.pdf 
  10130   Sat Jul 5 04:18:45 2014 AndresUpdate40m Xend Table upgradeAdding Two Lenses After the Second Steering Mirror in Order Two Increase the Gouy Phase Difference Between the Sterring MirrorsI had been working on the Xend table optical
layout update. Since the two steering mirrors
in the Xend green are too close to each,
 7x 
  10191   Sun Jul 13 17:06:35 2014 AndresUpdate40m Xend Table upgradeXarm Table Upgrade Calculation and Diagrams of possible new table layout Current Mode Matching
and Gouy Phase Between Steering Mirrors
 CurrentOpticalLayout.pngNewSetUp.PNGAlaModeSolutionplots.pngEntireScaleRangeAlaModeSolution.pngNewXarmOptimizationFromFaraday.m 
  10195   Mon Jul 14 16:19:41 2014 AndresUpdate40m Xend Table upgradeTook the measurement for the Mode Matching Nick
and I measured the reflected power of the
green light in locked and unlocked. I'm working
  
  10207   Tue Jul 15 22:23:51 2014 AndresUpdate40m Xend Table upgradeScan the Xarm for the mode matching Nick and I with the help of Jenne
scan the green light when the cavity is unlocked.
Nick placed a Beam dump on the IR so that
  
  10226   Thu Jul 17 02:57:32 2014 AndresUpdate40m Xend Table upgradeFInish Calculation on Current X-arm mode MatchingData and Calculation for the
Xarm Current Mode Matching
 RawDataForTheModeGreenScan.pngResultForModeMatching.pngDataAndCalculationOfModeMismatch.zip 
  10237   Fri Jul 18 16:52:56 2014 AndresUpdate40m Xend Table upgradeFInish Calculation on Current X-arm mode Matching

    

       
            
 OldAndNewSetupPlotsOfDisplacementAndAngleAtTheETM.pngOldSetUpDisplacementAndNewSetup.m.zip 
  10290   Tue Jul 29 20:14:08 2014 AndresUpdate40m Xend Table upgradeXarm Green steering mirror upgrade Xarm Green Steering Mirror Upgrade
Nick
and I did the upgrade for the green steering
mirror today. 
  
  10296   Wed Jul 30 10:16:54 2014 AndresUpdate40m Xend Table upgradeGreen Steering Mirror Upgrade completedGreen Steering Mirror Update
Yesterday,
Nick and I completed the green steering mirrors
upgrade. I attached the file that contained
 XarmUpgrade.pdfdWaistSize_dlensVsdWaistPosition_dlens.pngXarmNewOpticalSetup.PNG 
  10374   Wed Aug 13 10:50:04 2014 AndresUpdateIMCCalculation for the input mode cleaner  Calculation for the input mode
cleaner
I have been working on the
calculation for the input mode cleaner. I
 ModeCleanerSetup0.PNGalaModeModeCleanersolution.png 
  10384   Thu Aug 14 15:10:47 2014 AndresUpdateIMCCalculation for the input mode cleaner

    

       
            
 SolutionForTheModeCleanerSetup00.pngSolutionForTheModeCleanerSetup11.pngPossibleSetupForModeCleaner.PNGalaModeSolution.zip 
  10410   Tue Aug 19 21:40:44 2014 AndresUpdateIMCNew Optical Setup for the IMCIMC
Calculation and Setup
I have been working in the calculation
 11x 
  10427   Fri Aug 22 18:05:02 2014 AndresUpdateIMCUpgrade of the IMC WFSs for the reflection Upgrade of IMC Reflection Optical
Setup
Nick and I upgrade the IMC.
We move both WFSs and placed them facing
 ModeCleanerUpgrade.PNG 
  16190   Mon Jun 7 15:37:01 2021 Anchal, Paco, YehonathanSummaryCamerasMon 7 in Control Room DiedWe found Mon7 in control room dead today
afternoon. It's front power on green
light is not lighting up. All other monitors
  
  16112   Mon May 3 17:28:58 2021 Anchal, Paco, RanaUpdateLSCIMC WFS noise contribution in arm cavity length noiseRana came and helped us figure us where
to inject the noise. Following are the characteristics
of the test we did:
 excitationoftheMCanglessothatwecanseesomethingdotpng.pngexcitationoftheMCanglessothatwecanseesomethingdotpngbutthistimeitsMC2.png 
  16228   Tue Jun 29 17:42:06 2021 Anchal, Paco, GautamSummaryLSCMICH locking tutorial with GautamToday we went through LSC locking mechanics
with Gautam and as a "Hello World"
example, worked on locking michelson cavity.
  
  16237   Fri Jul 2 12:42:56 2021 Anchal, Paco, GautamSummaryLSCsnap file changed for MICHWe corrected the MICH locking snap file
C1configure_MI.req and saved an updated C1configure_MI.snap.
Now the 'Restore MICH' script in
  
  16239   Tue Jul 6 16:35:04 2021 Anchal, Paco, GautamUpdateIOORestored MCWe found that megatron is unable to properly
run scripts/MC/WFS/mcwfsoff and scripts/MC/WFS/mcwfson
scripts. It fails cdsutils commands due to
  
  16241   Thu Jul 8 11:20:38 2021 Anchal, Paco, GautamSummaryLSCPRFPMI locking attemptsLast night Gautam walked us through the
algorithm used to lock PRFPMI. We tried it
several times with the PSL HEPA filter off
  
  15851   Mon Mar 1 11:40:15 2021 Anchal, PacoSummaryIMCgetting familiar with IMC controls[Paco, Anchal]

tl;dr: Done no harm, no
lasting change.
  
  15982   Wed Mar 31 22:58:32 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing TestA cross-coupling test has been set to trigger
at 05:00 am on April 1st, 2021. The script
is waiting on tmux session 'cB' on
  
  15984   Thu Apr 1 13:56:49 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test ResultsThe coil balancing attempt failed. The
off-diagonal values in the measured sensing
matrices either remained the same or increased.
 SDistanceFromIdentity.pdfSmatIterations.pdfTestingExcitationAlongYAW.pdf 
  15985   Thu Apr 1 18:01:06 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test Results Success??After fixing a few things we felt were
wrong in our implementation of the algorithm,
we ran the coil balancing for 12 iterations
 SDistanceFromIdentity.pdfSmatIterations.pdfMC2CoilCrossCoupling_opt.png 
  15995   Mon Apr 5 08:25:59 2021 Anchal, PacoUpdateGeneralRestore MC from early quakes[Paco, Anchal]

Came in a little bit after 8 and
found the MC unlocked and struggling to lock
  
  16001   Tue Apr 6 18:46:36 2021 Anchal, PacoUpdateSUSUpdates on recent effortsAs mentioned in last post, we earlier made
an error in making sure that all time series
arrays go in with same sampling rate in CSD
 FirstMeasurementPlots.pdf 
  16007   Thu Apr 8 17:04:43 2021 Anchal, PacoUpdateSUSFirst Successful Coil BalancingToday, we finally crossed the last hurdle
and got a successful converging coil balancing
run. 
 SDistanceFromIdentity.pdfSmatIterations.pdfSmatrixPlots.pdf 
  16009   Fri Apr 9 13:13:00 2021 Anchal, PacoUpdateSUSFaster coil balancingWe ran again this method but with the 'b'
parameter as a matrix instead. This provides
more gain on some off-diagonal terms than
 SmatIterations.pdfMC2AllOutmat.txt 
  16016   Mon Apr 12 08:32:54 2021 Anchal, PacoSummaryPSLPMC unlocked at 2pm on Sunday; ~ RestoredPMC lost lock between 21:00 and 22:00 UTC
on April 11th as seen in the summary pages:

https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20210411/psl/#gallery-4
  
  16042   Fri Apr 16 11:36:36 2021 Anchal, PacoUpdateSUSTested proposed filters for POS colum in MC2 output matrixWe tried two sets of filters on the output
matrix POS column in MC2. Both versions failed.
Following are some details.
 20210416_MC2DCcoilBalancingNoFilters.pdfuncFilters.pdf20210416_MC2DCcoilBalancingWithFilters.pdfuncFilters_v2.pdf20210416_MC2DCcoilBalancingWithFilters_v2.pdf 
  16049   Mon Apr 19 12:18:19 2021 Anchal, PacoUpdateSUSTested proposed filters for POS colum in MC2 output matrixThe filters were somewhat successful, how
much we can see in attachment 1. The tip
about difference between eigenmode basis
 CrossCoupleTestForEgToCtFilters.pdfuncFilters.pdfuncFilters_v2.pdf 
  16054   Tue Apr 20 10:52:49 2021 Anchal, PacoUpdateSUSAC gain coil output balancing for IMC[Paco, Anchal]


We adopted the following
procedure to balance the coil output gains
 POS2PYuncoupled.pdfPIT2PYuncoupled.pdfMC1YAWexc.pdfMC1PITexc.pdf 
  16063   Wed Apr 21 11:38:27 2021 Anchal, PacoUpdateSUSMC2 Damping Gains OptimizedWe did a step response test with MC2 Suspensoin
Damping Gains and optimized them to get <5
oscillations in ringdown.
 MC2_DampGainStepTestWithNewGains.pngMC2_DampGainStepTestWithOldGains.png 
  16066   Wed Apr 21 15:50:01 2021 Anchal, PacoUpdateSUSMC2 Suspension Optimization summary
MC2
Coil Balancing DC and AC Gains


  
  16072   Thu Apr 22 12:17:23 2021 Anchal, PacoUpdateSUSMC1 and MC3 Suspension Optimization Summary    
  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:
  
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