40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 172 of 341  Not logged in ELOG logo
ID Date Authorup Type Category Subject Text Attachments
  6117   Wed Dec 14 12:22:00 2011 VladimirHowToComputersligo_viewer installed on pianosaI made a test installation of ligo_viewer
in
/users/volodya/ligo_viewer-0.5.0c
 ligo_viewer_40m2.png 
  6061   Thu Dec 1 18:30:39 2011 Vladimir, DenUpdatedigital noiseFoton errorFoton Matlab Error 
   
We investigated
some more the discrepancy between Matlab
  
  6083   Wed Dec 7 20:55:44 2011 Vladimir, DenUpdatedigital noiseMatlab error

    

       
            
 gain_cmp.png 
  16942   Thu Jun 23 15:05:01 2022 Water MonitorUpdateUpgradeWater Bottle Refill22:05:02 UTC Jordan refilled his water
bottle at the water dispenser in the control
room.
  
  6869   Mon Jun 25 15:19:07 2012 YaakovUpdatePEMAdded microphone channels, moved accelorometer channelsJenne and I renamed the mic channels Den
created (elog
6664) to MIC_1, MIC_2, etc from the original
 channels.png 
  6905   Mon Jul 2 23:08:38 2012 YaakovUpdateSTACISTurning on STACISThis past Friday I swapped out a burnt
resistor on the spare STACIS unit I'm working
with and powered it up. Here's the setup:
 geo_open.GIFgeo_closed.GIFgeo_closed.GIFSCRN0005.GIFstacy1.JPG 
  6908   Tue Jul 3 18:58:14 2012 YaakovUpdateSTACISMore transfer functions and netGPIB statusI'm still having issues with the STACIS
oscillating uncontrollably with the slightest
extra vibration, but with some more added
 geo_open_y.pnggeo_open_x.pngaccel_open_x.png 
  6963   Wed Jul 11 14:27:29 2012 YaakovSummarySTACISCurrent STACIS StatusThe X and Y directions in the STACIS still
both oscillate uncontrollably in closed loop,
so I'll be doing my testing in Z for now.
 geo_open_z.pnggeo_open_z2.pngambient_open_z.pngambient_closed_z_geoFeed.pngopenVclosed.GIF 
  6969   Thu Jul 12 15:43:07 2012 YaakovUpdateSTACISNew input point, using accelerometers for feedback Here's a picture of where I am now
inputting signals into the STACIS with the
accelerometers (the orange and blue wires): 
 new_input.JPGcBoard_tFunction.png 
  6988   Wed Jul 18 13:53:34 2012 YaakovUpdateSTACISWeekly updateI have been working on substituting the
internal geophones in the STACIS with accelerometers,
and this week specifically I have been trying
 flange.JPGreally_accelFeed.GIF 
  7020   Tue Jul 24 18:33:12 2012 YaakovUpdateVIDEOCentering the MCR cameraJenne and I centered the MCR camera   
  7026   Wed Jul 25 11:41:00 2012 YaakovUpdateVIDEOCentering the MCR camera

    

       
            
  
  7027   Wed Jul 25 12:00:21 2012 YaakovUpdateSTACISWeekly updateThe past few days I've been working on
making a noise budget for the
  
  7040   Thu Jul 26 16:08:59 2012 YaakovUpdateSTACISNoise plot updateI have a tentative noise plot for the STACIS
that includes accelerometer noise, geophone
noise, and platform motion with the STACIS
 stacy_noise.bmpstacy_noise.figfeedbacks.bmpfeedbacks.fig 
  7053   Mon Jul 30 17:24:45 2012 YaakovUpdateSTACISRevised sensor noise plot; dead PZTThe geophone noise in my last eLog was
taken before
any amplification of the signal, but
 sensor_noise.bmpsensor_noise.bmpsensor_noise.fig 
  7054   Mon Jul 30 22:52:51 2012 YaakovUpdateSTACISGeophone calibrationTonight I looked at the signal from a geophone
and accelerometer side by side, in order
to see if they show the same ground motion
 7x 
  7058   Tue Jul 31 15:24:53 2012 YaakovUpdateSTACISOpen loop gains and block diagramFirst, a quick note on the PZT I thought
I killed- it was most likely something in
the high voltage amplifier that broke, since
 z_OL.figz_OL.bmpx_OL.bmpstacis_block.bmpx_OL.fig 
  7068   Wed Aug 1 11:54:59 2012 YaakovSummarySTACISGeophone calibration and open loop gainsThis week I've looked into finding an accurate
sensitivity for the geophones in the STACIS.
I found that when placing a geophone and
 08011201.pdf 
  7109   Tue Aug 7 21:34:50 2012 YaakovUpdateSTACISMore noise dataYesterday I plugged the geophone and
accelerometer output into the ADC, rather
than the SR785, so I could collect for longer
 budget.bmpbudget.fig 
  7118   Wed Aug 8 11:47:52 2012 YaakovSummarySTACISWeekly summaryAs Rana pointed out (http://nodus.ligo.caltech.edu:8080/40m/7112),
the geophone/accelerometer noise lines from
my last eLog (http://nodus.ligo.caltech.edu:8080/40m/7109)
 budget_with_adc.pngbudget_with_adc.figpower_diagram.png 
  7148   Fri Aug 10 18:11:55 2012 YaakovUpdateSTACISCorrected noise budget, plan for external actuationI hope you're not all tired of the STACIs
noise budgets, because I have another one!
Here, the main difference is my modeling
 6x 
  7166   Mon Aug 13 21:47:30 2012 YaakovUpdateSTACISTwo changes to STACIS noise budgetIn eLog 7148 (http://nodus.ligo.caltech.edu:8080/40m/7148),
Koji pointed out that the op-amp and SR560 noise values
 noise_budget_8-13.bmpnoise_budget_8-13.bmpnoise_budget_8-13.fig 
  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 
  7190   Wed Aug 15 11:40:15 2012 YaakovSummarySTACISWeekly Summary This week I've been focusing mainly on
two things: 1) Designing a port for the STACIS
that will allow external actuation and/or
  
  7204   Thu Aug 16 13:49:33 2012 YaakovUpdatePEMTransfer functions of seismic stacks, differential motion of test massI estimated the transfer function of the
seismic stacks using a rough model I made
based on the LIGO document LIGO
 8x 
  7209   Thu Aug 16 20:04:46 2012 YaakovUpdatePEMTransfer functions of seismic stacks, differential motion of test mass 
 I made the plots a little nicer
and added new sensor noises (from Brian Lantz's
 6x 
  7210   Thu Aug 16 20:18:39 2012 YaakovUpdateSTACISInput for feedforward/feedback in the STACISBelow is the bottom view of the geophone
preamplifier and controller for the STACIS.
It slides into the upper part of the STACIS,
 6x 
  7231   Sun Aug 19 19:56:20 2012 YaakovUpdateSTACISSTACIS signal box madeI made the signal box as described in eLog
7210. It adds the geophone signal and
 SAM_0275.JPGSAM_0277.JPGSAM_0276.JPG 
  7262   Thu Aug 23 21:53:18 2012 YaakovUpdatePEMAccelerometer locationThe MC1 accelerometer cube (3 accelerometers
arranged in x,y,z) is under the PSL table,
as I found it at the beginning of the summer.
  
  6882   Wed Jun 27 14:18:30 2012 Yaakov SummarySTACISFirst week summaryThe beginning of my first week was spent
at various orientations and safety meetings,
some for general SURF and some more specific
  
  14568   Wed Apr 24 17:39:15 2019 YehonathanSummaryLoss MeasurementBasic analysis of loss measurementMotivation


Getting myself familiar
with Python.
Characterize statistical
 LossMeasurementAnalysis.zipLossMeasurement_RawData.pdfLossMeasurement_Hist.pdfLossMeasurement_PSD.pdf 
  15005   Sat Nov 2 16:36:55 2019 YehonathanUpdatePSLUp to date sketch of the 1x1 and 1x2 EurocratesI reproduced Gautam's sketch of the
1x1 and 1x2 Eurocrates into a pdf image
that contains links to the appropriate DCCs
 1x1_1X2_Eurocrates_with_links.pdf 
  15006   Sat Nov 2 17:08:34 2019 YehonathanUpdatePSLUp to date sketch of the 1x1 and 1x2 EurocratesThanks. Please update this wiki page too.

https://wiki-40m.ligo.caltech.edu/Electronics/ElectronicsRacks#A1X1
  
  15008   Mon Nov 4 13:26:04 2019 YehonathanUpdatePSLUp to date sketch of the 1x1 and 1x2 EurocratesDone.




  
  15011   Mon Nov 4 19:02:25 2019 YehonathanUpdatePSLMapping the PSL electronicsI created a spreadsheet (Attached) by taking Koji's
c1psl sheet from slow_channel_list and filtering
out the channels that do not need an Acromag.
 PSL_Wirings_-_Sheet1_(1).pdf 
  15039   Wed Nov 20 17:20:24 2019 YehonathanUpdateLSCQPD Investigation{Gautam, Yehonathan}

In search of the source of discrepancy
between the QPD readings in the X and Y arms,
  
  15048   Tue Nov 26 13:33:33 2019 YehonathanUpdateCamerasMC2 Camera rotated by 90 degreesMC2 analog camera was rotated by 90 degrees.
Orientation correctness was verified by exciting
the MC2 Yaw degree of freedom.
 MC2AnalogCameraAfter.jpgMC2AnalogCameraBefore.jpg 
  15070   Wed Dec 4 08:54:07 2019 YehonathanUpdateIMCMirror analog shaking{Yehonathan, Gavin}

Yesterday we tried to shake ITMX
with a function generator in order to observe
  
  15071   Wed Dec 4 09:11:42 2019 YehonathanUpdateCDSReboot scriptAfter the CDSs crashed we run the rebootC1LSC.sh script.

The script is a bit annoying in
that it requires entering the CDSs' passwords
 medmScreen11.ps 
  15086   Mon Dec 9 13:08:24 2019 YehonathanSummaryPEMJump test of seismometers: EX needs recenteringI check the seismometers in the last 14
hours (Attached). Seems like the coherenece
is restored in the x direction.
 seis_191208.pdf 
  15087   Mon Dec 9 19:19:04 2019 YehonathanUpdatePSLAOM first order beam alignment{Yehonathan, Rana}

In order to setup a ringdown measurement
with perfect extinction we need to align
 20191209_193112.jpg20191209_193203_HDR.jpgimageedit_2_7551928142.gifimageedit_3_5863650538.gif 
  15089   Tue Dec 10 01:24:17 2019 YehonathanUpdatePSLAOM first order beam alignment 




  
  15090   Tue Dec 10 13:26:46 2019 YehonathanUpdatePSLAOM first order beam alignmentnvm the PZT can scan over many GHz.




  
  15091   Tue Dec 10 15:17:17 2019 YehonathanUpdatePSLPMC is locked{Jon, Yehonathan}

We burt-restored the PSL and the
PMC locked immediately.
  
  15092   Tue Dec 10 18:27:22 2019 YehonathanUpdatePSLPMC is locked{Yehonathan, Jon}

We are able to lock the PMC on
the TEM00 mode of the deflected beam.
  
  15094   Wed Dec 11 15:29:17 2019 YehonathanUpdatePSLPMC is lockedMake sure
to measure the power drop of the beam downstream
  
  15096   Thu Dec 12 19:20:43 2019 YehonathanUpdatePSLPMC cavity ringdown measurement{Yehonathan, Rana, Jon}

To check whether we laser is being
shut fast enough for the ringdown measurement
 IMG_0105.jpegTEK00001.PNG20191212_151642.jpg 
  15097   Fri Dec 13 12:28:43 2019 YehonathanUpdatePSLPMC cavity ringdown measurementI grab the data we recorded yesterday from
the scope and plot it in normalized units (remove
noise level and divide by maximum). See attachment.
 Ringdown_InitialProcess.pdf 
  15099   Tue Dec 17 00:23:28 2019 YehonathanUpdatePSLMapping the PSL electronicsI added to the PSL wiring list the
ioo channels and the laser shutter (See attached
pdf for an updated list).
 PSL_Wirings_-_Sheet1_(2).pdf 
  15100   Tue Dec 17 18:05:06 2019 YehonathanUpdatePSLMapping the PSL electronicsUpdated the channel list (Attached):

1. Removed the MC steering mirror
PZT channels
 PSL_Wirings_-_Sheet1_(3).pdf 
ELOG V3.1.3-