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ID Dateup Author Type Category Subject Text Attachments
  51   Thu Jun 17 07:40:07 2010 James KMiscHartmann sensorSURF Log -- Day 1, Getting Started For Wednesday, June 16:   
  52   Thu Jun 17 22:03:51 2010 James KMiscHartmann sensorSURF Log -- Day 2, Getting StartedFor Thursday, June 17:
Today I attended a basic laser safety
training orientation, the second Introduction
  
  53   Sat Jun 19 17:31:46 2010 James KMiscHartmann sensorSURF Log -- Day 3, Initial Image Analysis   7x 
  54   Tue Jun 22 00:21:47 2010 James KMiscHartmann sensorSurf Log -- Day 4, Hartmann Spot Flickering Investigation I started out
the day by taking some images from the CCD
 7x 
  55   Tue Jun 22 22:30:24 2010 James KMiscHartmann sensorSURF Log -- Day 5, more Hartmann image preliminary analysis Today I spoke with Dr. Brooks and
got a rough outline of what my experiment
for the next few weeks will entail. I'll
 13x 
  56   Wed Jun 23 06:49:48 2010 AidanMiscHartmann sensorSURF Log -- Day 5, more Hartmann image preliminary analysisNice work!
 

  
  57   Wed Jun 23 22:57:22 2010 James KMiscHartmann sensorSURF Log -- Day 6, Centroiding So in addition to taking steps towards
starting to set stuff up for the experiment
in the lab, I spent a good deal of the day
 10x 
  58   Fri Jun 25 00:11:13 2010 James KMiscHartmann sensorSURF Log -- Day 7, SLED Beam Characterization 
 BeamData.xlsxbeam_pdfs.zipbeamdata.mgsbeam.m 
  59   Fri Jun 25 10:47:08 2010 AidanMiscaLIGO ModelingUploaded aLIGO axicon+ITM COMSOL model to the 40m SVNI added a COMSOL model of the aLIGO ITM
being heated by an axicon-formed annulus
to the 40m SVN. The model assumes a fixed
 aLIGO_axicon_spacing_post-magnification_optimization.jpg 
  60   Fri Jun 25 10:59:43 2010 AidanMiscaLIGO ModelingUploaded aLIGO axicon+ITM COMSOL model to the 40m SVNHere are the results in the annulus thickness
vs annulus diameter space ...

 Screen_shot_2010-06-25_at_11.01.38_AM.png 
  61   Wed Jun 30 00:00:13 2010 Kathryn and WonComputingHartmann sensorrms of centroid position changesGiven
below is a brief overview of calculating
rms of spot position changes to test the
 rms_plot_shuffle.jpgrms_plot_shuffle.jpgrms_plot_noshuffle.jpgeLOG.zip 
  62   Thu Jul 1 09:40:13 2010 James KunertMiscHartmann sensorSURF Log 8 -- more SLED characterizationAs I started setting up my next experiment,
I noticed that the beam size from the SLED
appeared to be larger than expected from
 8x 
  63   Sun Jul 4 06:45:50 2010 Kathryn and WonComputingHartmann sensoranalyzing the wavefront aberrationHappy
Fourth of July!
 eLOG.zipwf_aberration_plot_hightemp_byintegration.jpgwf_aberration_plot_hightemp_fitted.jpg 
  64   Tue Jul 6 21:57:19 2010 James KunertMiscHartmann sensorSURF Log -- SLED fiber output temporal analysisIn the previous log, I describe the direct
measurement of the fiber output beam using
the Hartmann sensor with the plate removed.
 6x 
  65   Thu Jul 15 20:06:37 2010 James KMiscHartmann sensorSURF Log: Thermally Induced Defocus ExperimentsA quick write-up on recent work can be
found at: Google
Docs
 pydefoc.mpyanalyze.mpyimportsingle.mpyimportM.mframesumexport2.py 
  66   Tue Jul 20 15:45:51 2010 AidanComputingGeneralAdd fixed IP addresses to local machines in TCS labhttp://nodus.ligo.caltech.edu:8080/AdhikariLab/859   
  67   Tue Jul 20 18:13:06 2010 AidanComputingGeneralAdded TCS channels to frame builder http://nodus.ligo.caltech.edu:8080/AdhikariLab/860
 contents of tcs_daq: /target/TCS_westbridge.db
  
  68   Thu Jul 22 11:02:59 2010 AidanComputingGeneralRestarted hartmann machinehartmann had started responding
to requests to log-in with the a request
to change the password. Attempts to change
  
  69   Thu Jul 22 21:46:55 2010 James KunertMiscHartmann sensorHartmann Sensor Thermal Defocus Measurement Noise & Ambient Light EffectsAs discussed during the teleconference,
a series of experiments have been conducted
which attempt to measure the thermally induced
 72210b_ambient.png 
  70   Fri Jul 23 10:33:08 2010 AidanComputingHartmann sensorDalsa camera ADC 8th digitizer error I plotted a histogram of the total intensity
of the Hartmann sensor when illuminated and
found that the 128 count problem extends
 histogram_of_dalsa_intensity.pdf 
  71   Fri Jul 23 12:33:51 2010 AidanComputingHartmann sensorInvar clamp scatterI illuminated the Hartmann sensor with
the output of a fiber placed ~1m away.
I noticed that the illumination was
  
  72   Fri Jul 23 12:38:58 2010 AidanComputingHartmann sensorImages for DalsaAttached are the background and 80% illumination
(~uniform spatially uniform) images that
Dalsa requested. 
 dark_0000.jpgbright_0000.jpg 
  73   Fri Jul 23 19:52:49 2010 AidanComputingHartmann sensorDalsa camera ADC 8th digitizer error I've attached an image that shows the locations
of those pixels that record a number of counts
= (2*n-1)*128. 
 image-location-of-excess_pixel_count_pixels.jpg 
  74   Sat Jul 24 10:50:14 2010 AidanElectronicsHartmann sensorLab Temperature and HWS temperature: pre-indium Hour-long trend puts the lab temperature
at 19.51C
Dalsa temperature:
  
  75   Sun Jul 25 16:24:56 2010 AidanComputingSLEDSuperlum SLED test integrated with DAQ - new channel names I added some new channels to the
Athena DAQ that record the diagnostic channels
from the Superlum SLED.
  
  76   Mon Jul 26 09:42:30 2010 AidanComputingSLEDLong term test on SLED started - Day 0 I set up the SLED to test its long
term performance. The test began, after a
couple of false starts, around 9:15AM this
 SLED_superlum_long_term_test_0001A.pdfSLED_superlum_long_term_test_0001B.pdf 
  77   Mon Jul 26 12:17:25 2010 AidanElectronicsHartmann sensorAdded Indium to HWS I added some 0.004" thick indium
sheet to the copper heat spreaders and and
the heat sinks on the side of the HWS to
 indium-01.jpgindium-03.jpgindium-05.jpgindium-02.jpgindium-04.jpg 
  78   Mon Jul 26 18:47:12 2010 James KMiscHartmann sensorHex Grid Analysis Errors and Thermal Defocus NoiseMy previous eLog details how the noise
in Hartmann Sensor defocus measurements appears
to vary with ambient light. New troubleshooting
 centerror.PNGcentinit.pnghexgrid.png72010a.png72010a_nohex.PNG 
  79   Tue Jul 27 08:31:10 2010 AidanElectronicsSLEDLong term SLED test - Day 1 The measurement from the on-board
PD of the Superlum SLED seems to be falling.
This effect started around 5PM last night
 SLED_superlum_long_term_test_0002A.pdf 
  80   Wed Jul 28 18:32:12 2010 AidanElectronicsSLEDSLED long term test - Day 2Here's the data from the last 2 1/2 days
of running the SLED. The decrease in photo-current
measured by the on-board photo-detector is
 SLED_superlum_long_term_test_0003A.pdf 
  81   Thu Jul 29 10:09:19 2010 AidanElectronicsSLEDSLED long term test - Day 2I've attached the Acceptance Test Report
data from SUPERLUM for this SLED. I've also
determined the expected percentage decrease
 superlum_SLED_ATR.pdf 
  82   Fri Jul 30 10:04:54 2010 AidanComputingHartmann sensorRestarted the HWS EPICS channels Restarted the HWS EPICS channels
on hartmann with the following
command:
  
  83   Fri Jul 30 11:01:31 2010 AidanComputingHartmann sensorEPICS softIoc alias I added an alias HWSIoc to
controls which can be used to
start the HWS EPICS softIoc.
  
  84   Fri Jul 30 13:38:39 2010 James KunertComputingHartmann sensorSummary of Thermal Defocus Data AnalysisBelow is a table summarizing the results
of recent thermal defocus experiments. The
values are the calculated change in measured
 ThermDefocMasterFunctions.pngThermDefoc--py4plot.png 
  85   Fri Jul 30 19:22:24 2010 AidanComputingEPICSWaveform Channel Access for storing centroids A waveform channel was added to the
HWS softIoc on hartmann. This allows arrays
of data to be stored in a single channel.
  
  86   Fri Jul 30 21:19:05 2010 AidanComputingEPICSWaveform Channel Access for storing centroidsAfter some discussion with Frank we figured
out how to edit the record type in HWS.db
so that the waveform/array channel actually
  
  87   Sat Jul 31 11:54:20 2010 AidanComputingSLEDSLED Test Day 5 - Re-tuned current set-point control voltageMain Points

    Re-set SLED current set-point
control voltage to 0.111V
    SLED
  
  88   Wed Aug 4 09:57:38 2010 Aidan, JamesComputingHartmann sensorRMS measurements with Hartmann sensor[INCOMPLETE
ENTRY]
We set up the Hartmann sensor and
 rms_analyze_centroids_aidan.pdfRMS_WonCode.pngRMS_WonCodeLessPrism.png 
  89   Mon Aug 9 10:58:37 2010 AidanLaserSLEDSLED 15-day trend Here's a plot of the 15-day output
of the SLED.
Currently there is an 980nm FC/APC
 SLED_superlum_long_term_test_0005A_annotated_15-day_result.pdf 
  90   Tue Aug 17 16:31:55 2010 AidanThings to BuyLaserBought a laser diode from Thorlabs for HWShttp://www.thorlabs.com/thorProduct.cfm?partNumber=CPS180
I bought this laser diode from Thorlabs
today to try the current modulation trick
  
  91   Tue Aug 17 22:34:14 2010 ranaMiscGeneralETM temperature after a 1W stepThis attachment is a Shockwave Flash animation
of the iLIGO ETM getting a 1 W beam with
a 3.5 cm radius getting fully absorbed onto
 etmt.swf 
  92   Wed Aug 18 18:38:11 2010 AidanComputingHartmann sensorHartmann sensor code I downloaded and tested revision
47 of the Adelaide Hartmann sensor code from
the SVN (https://trac.ligo.caltech.edu/Hartmann_Sensor/browser/users/won/HS_OO?rev=47).
 test_HS_Classes.mHS_Image.mHS_Centroids.mHWS_code_output.pngHWS_input_image.png 
  93   Mon Aug 23 08:43:16 2010 AidanThings to BuyLaserBought a laser diode from Thorlabs for HWSIt arrived on Friday.


  
  94   Mon Sep 13 18:24:52 2010 AidanLaserHartmann sensorEnclosure for the HWSI've assembled the box Mindy ordered from
Newport that will house the Hartmann sensor.
It's mainly to reduce ambient light, air
 00001.jpg00002.jpg00003.jpg00005.jpg 
  95   Tue Sep 28 10:41:32 2010 AidanLaserHartmann sensorAligning HWS cross-sample experiment - polarization issuesI'm in the process of aligning the cross-sampling
experiment for the HWS. I've put the 1"
PBS cube into the beam from the fiber-coupled
  
  96   Tue Sep 28 17:53:40 2010 AidanLaserHartmann sensorCrude alignment of cross-sampling measurementI've set up a crude alignment of the cross-sampling
system (optical layout to come). This was
just a sanity check to make sure that the
 2010_09_28-HWS_cross_sample_expt_crude_alignment_01.pdf 
  97   Wed Sep 29 16:49:36 2010 AidanLaserHartmann sensorCross-sampling experiment power budgetI've been setting up the cross-sampling
test of the Hartmann sensor, Right now I'm
waiting on a 50/50 BS so I'm improvising
 00001.jpg 
  98   Mon Oct 4 19:44:03 2010 AidanLaserHartmann sensorCross-sampling experiment - two beams on HWSI've set up the HWS with the probe beam
sampling two optics in a Michelson configuration
(source = SLED, beamsplitter = PBS cube).
 test001_two_beams_on_HWS.pdf 
  99   Tue Oct 5 12:51:16 2010 AidanLaserHartmann sensorVariable power in two beams of cross-sampling experimentThe SLED in the cross-sampling experiment
produces unpolarized light at 980nm. So I
added a PBS after the output and then a HWP
 test002_two_beams_on_HWS_analyze.pdfHartmann_Enclosure_Diagram__x-sampling.png 
  100   Thu Nov 4 13:31:19 2010 Won KimComputingHartmann sensorFrame Grabber SDK installation Appended
below is the step by step procedure that
  
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