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ID Date Author Type Category Subjectdown Text Attachments
  1845   Thu Aug 6 17:51:21 2009 ChrisUpdateGeneralDisplacement Sensor UpdateFor the past week Dmass and I have been
ordering parts and getting ready to construct
our own modified version of EUCLID (figure). 
 Actual_Sensor.pngSensitivity.png 
  1846   Thu Aug 6 18:21:03 2009 ChrisUpdateGeneralDisplacement Sensor Update


   
        
            
  
  1030   Tue Oct 7 10:49:29 2008 AlbertoUpdateGeneralDisplaced PhotodiodeThis morning I found that the photodidode
of the PLL in the PSL table was not aligned
to the beam anymore. The PD support was not
  
  13117   Fri Jul 14 17:47:03 2017 gautamUpdateGeneralDisks from LLO have arrived[jamie, gautam]

Today
morning, the disks from LLO arrived. Jamie
and I have been trying to get things back
  
  14474   Tue Mar 5 15:56:27 2019 gautamSummaryTip-TIltDiscussion points about TT re-designChub, Koji and I have been talking about
Udit's re-design. Here are a few points
that were raised. Chub/Koji can add to/correct
  
  11791   Thu Nov 19 17:06:57 2015 KojiConfigurationCDSDisabled auto-launching RT processes upon FE bootingWe want to startup the RT processes one
by one on boot of FE machines.

Therefore /diskless/root/etc/rc.local
  
  394   Sat Mar 22 22:39:02 2008 mevansSummaryCDSDirect Form 2 filters are badHere I show a comparison between the filter
algorithm currently used in LIGO (Direct
Form II), and an alternative algorithm designed
 low-noise_filtering.pnglow-noise_zoom.pngFiltRT.zip 
  10610   Wed Oct 15 17:09:49 2014 manasaUpdateGeneralDiode laser test preparation[EricG, manasa]
The He-Ne laser oplev setup was swapped
with a fiber-coupled diode laser from W Bridge.
  
  10651   Wed Oct 29 18:07:28 2014 manasaUpdateGeneralDiode laser test preparationI ran 3 BNC cables from the SP table to
1X7 rack so that we can have 16 bit channels
for the Ontrak PD that will be used to test
  
  8332   Fri Mar 22 19:46:29 2013 KojiSummaryLSCDiode impedance test resultI've tested Perkin-Elmer InGaAs PDs at
OMC Lab.
- The diode impedances were measured
  
  9353   Wed Nov 6 14:47:41 2013 SteveFrogsLSCDin connectors added at 1Y2 The north side of the LSC rack is
full. I installed more DIN connectors with
fuses on the south side of the rack 1Y2
 1Y2moreDinFuses.jpg 
  4213   Thu Jan 27 17:12:02 2011 Aidan, JoeSummaryGreen LockingDigital Frequency to Amplitude converterJoe and I built a very simple digital frequency
to amplitude converter using the RCG. The
input from an ADC channel goes through a
 Screenshot.pngSwept_sine_F_to_A.png 
  4227   Sun Jan 30 17:15:09 2011 AidanSummaryGreen LockingDigital Frequency discriminator - frequency noiseI've had a go at trying to estimate the
frequency noise of the digital frequency
discriminator (DFD). I input a 234.5Hz (0.5Vpp)
 _Untitled_(modified).png 
  4259   Tue Feb 8 10:23:02 2011 AidanSummaryGreen LockingDigital Frequency Discriminator - reference 
Here's the reference for the self-reference
frequency detection idea. See Figure 2.
  
  4218   Fri Jan 28 10:27:46 2011 Aidan, JoeSummaryGreen LockingDigital Frequency Discriminator - calibration One more thing ... we can calibrate
the output of the LP filter to give a result
in Hz with the following calibration:
  
  4216   Thu Jan 27 23:21:50 2011 ranaSummaryGreen LockingDigital Frequency DiscriminatorThat's some pretty fast work! I
thought we would be taking up to a week to
get that happening. I wonder what's the right
  
  4217   Fri Jan 28 09:03:38 2011 AidanSummaryGreen LockingDigital Frequency Discriminator

    

       
            
  
  7186   Wed Aug 15 01:14:19 2012 YaakovUpdatePEMDifferential Motion of X and Y ArmDen and I measured the differential motion
of the x and y arms using Guralp 1 at the
end of the y arm, Guralp 2 at the beamsplitter,
 diff_motion_x_arm.pngdiff_motion_y_arm.pngdiff_motion_x_arm.pngdiff_motion_y_arm.png 
  10716   Fri Nov 14 15:26:45 2014 SteveUpdatesafetyDiego gets safety traningDiego Bersanetti received 40m specific
safety training today.
  
  6108   Mon Dec 12 16:30:17 2011 JenneUpdateComputersDid someone just do something to fb??Dataviewer couldn't connect to the framebuilder,
so I checked the CDS status screen, and all
the fb-related things on each model went
  
  6112   Tue Dec 13 11:51:33 2011 JamieUpdateComputersDid someone just do something to fb??

    

       
            
  
  671   Tue Jul 15 10:09:42 2008 EricDAQCamerasDid anyone kill the picture taking process on Mafalda?Did anyone kill the process on Mafalda that
was taking pictures of the end mirror of
the x-arm last Friday?  I need to know whether
  
  3964   Mon Nov 22 16:16:04 2010 josephbUpdateCDSDid an SVN update on the CDS codeProblem:
The CDS oscillator part doesn't
work inside subsystems.
  
  3353   Tue Aug 3 11:17:10 2010 kiwamuUpdateCDSDiagrams for Cables needed for CDS testCurrent Wiring Setup for the Suspension
Controls
 sus_wiring.pngsus_new_wiring.pngsus_missing_stuff.png 
  16931   Tue Jun 21 08:36:50 2022 AnchalUpdateSUSDiagonalized input matrices for LO1, freeSwing on ITMY and ITMXOver the weekend, I ran freeSwing test
with sequential kicks in specific DOFs for
LO1, ITMY, ITMX. LO1 results were successfully
 SUSInpMatDiag_LO1.pdf 
  851   Tue Aug 19 13:12:55 2008 JenneUpdateSUSDiagonalized PRM Input Matrix[SIZE=2][COLOR=blue]NOTE:  Use the values
in elog #860 instead (20Aug2008)[/COLOR][/SIZE]
  
  12484   Mon Sep 12 20:15:22 2016 LydiaUpdateSUSDiagonalization in air[Lydia, Teng]

We ran the scripts to diagonalize
the damping matrices using the free swinging
 ITMY_fit.jpgBS_diag.jpg 
  12490   Tue Sep 13 19:18:43 2016 LydiaUpdateSUSDiagonalization in air[Lydia, Teng]

We continued to work on the diagonalization
scripts today and devised a way of choosing
 ITMY_diag.jpg38.png 
  12495   Wed Sep 14 20:27:03 2016 LydiaUpdateSUSDiagonalizationToday the main optics were free swinging
for several hours, so I attempted diagonalization
in vacuum.
 ETMY_diag.png 
  12497   Thu Sep 15 18:37:20 2016 LydiaUpdateSUSDiagonalization[Teng, Lydia]


We fixed the 60Hz filter
on ITMY. This improved the phase problems
 ETMY_osemspec.pngITMY_osemspec.png 
  12499   Fri Sep 16 19:14:27 2016 LydiaUpdateSUSDiagonalization[Lydia, Teng]

We built matrices for ITMY
and ETMY by driving one degree of freedom
 ETMY_yawdrivedefault.pngETMY_yawdrivenew.pngETMY_yawdriveold.png57.png 
  5349   Tue Sep 6 21:33:21 2011 JenneUpdateSUSDiagonalizability of ITMX and ITMY is acceptable[Rana and Kiwamu on ITMX, Jenne and Suresh
on ITMY, Zombie/brains meeting on accepting
the matricies]
 ITMX.pngITMY.png 
  15047   Mon Nov 25 22:10:26 2019 shrutiUpdateNoiseBudgetDiagnostics This is to help troubleshoot the excess
noise measured earlier.

The following channels were measured
 LSC.pdfITMY.pdfITMX_L.pdf 
  15191   Thu Feb 6 01:16:58 2020 gautamUpdateLSCDiagnosis resultsSummary:

I did some more detailed tests
to see if I could isolate where the excess
 IMCspec_ALS.pdfIMCspec_ALS_smallSpan.pdf 
  15188   Wed Feb 5 16:35:12 2020 gautamUpdateLSCDiagnosis planThe goal is to try and identify the source
of the excess ALS noise as the CARM offset
is reduced. The idea is to look at the MC_F
 ALSnoise.pdf 
  4712   Fri May 13 14:54:20 2011 Leo SingerUpdateComputersDiaggui fixed on pianosaI fixed diaggui on pianosa.  Previously,
it was not able to start because it depended
on libreadline5, whereas Ubuntu distributed
  
  14097   Sun Jul 22 14:01:07 2018 poojaUpdateCamerasDeveloping neural networks on simulated videoAim: To develop a neural
network that resolves mirror motion from
 nn_simulation_2_normalized_mult_sin_nodes8_128epochs_lr0p00001_beta1_0p8_beta2_0p85_0p4train_0p1valid_marked.pdfnn_simulation_normalizedtarget_128epochs_mult_sin_load_wt_varyingtest_nodes8_lr0p00001_beta1_0p8_beta2_0p85_0p4train_0p1valid_marked.pdfnn_simulation_2_normalized_varying_mult_sin_nodes8_128epochs_lr0p00001_beta1_0p8_beta2_0p85_0p4train_0p1valid_marked.pdf 
  14100   Tue Jul 24 06:11:50 2018 ranaUpdateCamerasDeveloping neural networks on simulated videoThis looks like good progress. Instead
of fixed sines or random noise, you should
generate now a time series for the motion
  
  14101   Tue Jul 24 09:47:51 2018 gautamUpdateCamerasDeveloping neural networks on simulated videoI was thinking a little more about the
way we are training the network for the current
topology - because the network has no recurrent
  
  14005   Fri Jun 22 10:42:52 2018 poojaUpdate Developing neural networksAim: To find a model that trains the simulated
data of Gaussian beam spot moving in a vertical
direction by the application of a sinusoidal
 NN_fig.zip 
  14021   Tue Jun 26 17:54:59 2018 poojaUpdateCamerasDeveloping neural networksAim:  To find a model that trains
the simulated data of Gaussian beam spot
moving in a vertical direction by the application
 NN_noise_diag.zip 
  13937   Sun Jun 10 15:04:33 2018 poojaUpdateCamerasDeveloping neural networkAim: To develop a neural network in order
to correlate the intensity fluctuations in
the scattered light to the angular motion
 nn_block_diag_2.pdf 
  13972   Fri Jun 15 09:51:55 2018 poojaUpdateCamerasDeveloping neural networkAim : To develop a neural network on simulated
data.

I developed a python code that
 nn_1.pdfnn_2.pdf 
  14114   Sun Jul 29 23:15:34 2018 poojaUpdateCamerasDeveloping CNNAim: To develop a convolutional
neural network that resolves mirror motion
 conv_nn_varying_freq_amp_1.pdfconv_nn_varying_freq_amp_2.pdf 
  13109   Mon Jul 10 21:31:15 2017 KaustubhHowToComputer Scripts / ProgramsDetails on Cavity Scan AnalysisSummary:

The
following elog describes the procedure followed
 Attachments.zip 
  7271   Fri Aug 24 14:46:08 2012 JenneSummaryGeneralDetailed alignment planFriday / pre-vent:
[done]
Align the MC mirrors for the incident
  
  5530   Fri Sep 23 16:56:07 2011 MirkoUpdateLSCDesired MC modulation frequency measurement, tuning of modulation frequency[ Mirko, Koji, Suresh ]
Looked into the modulation frequency
that should pass the input MC. With a locked
  
  4441   Thu Mar 24 19:48:13 2011 Aidan, KiwamuUpdateGreen LockingDesigns for permanent electronics for ALSKiwamu and I looked at all the electronics
that are currently in place for the green
locking on the X-arm and have made a set
 GreenLockingElectronics.pdfGreenEndPDHsupportboxandLO.pdfVertexBeatnoteAmplifierandComparator.pdfMixerFrequencyDiscriminator.pdf 
  5773   Mon Oct 31 21:46:32 2011 kiwamuUpdateLSCDependence of Recycling gain on incident beam pointingI
horizontally swept the translation of the
incident beam in order to investigate a possible
 beam_scan_PRCL.png 
  1806   Wed Jul 29 13:15:35 2009 ClaraUpdatePEMDents = Bad??I was in the lab last night accelerometerizing
and noticed some dents on the tubes that
stick out horizontally from the MC2 optical
 small_dent.pngbig_dent1.pngbig_dent2.png 
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