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ID Date Authordown Type Category Subject Text Attachments
  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 
  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 
  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 
  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 
  4   Tue Dec 29 16:05:09 2009 FrankComputingDAQbooting VME crates from fb1 http://nodus.ligo.caltech.edu:8080/AdhikariLab/514   
  232   Mon Jul 22 18:44:53 2019 Edita BytyqiThings to BuyGeneralNeed to Order GlovesSmall/Medium size gloves need to be ordered
in order to handle the optics carefully.
  
  233   Mon Jul 22 18:46:23 2019 Edita BytyqiLab Infrastructure Laser-Lens-HWS SetupToday, I set up a system consisting of
the 520 nm laser, a 2'' mirror and
two lenses of focal lengths f1 = 40 cm and
 20190722_183933.jpg20190722_183928.jpg 
  234   Wed Jul 24 16:25:13 2019 Edita BytyqiLab InfrastructureOpticsUpdated 2-lens setupThe previous 2-lens setup focused the beam
to a tight spot, however due to the divergence
angle of the laser beam, a significant amount
 20190724_161926.jpg 
  236   Mon Jul 29 18:53:16 2019 Edita BytyqiLab InfrastructureOpticsMounted Reflector and HeaterSince we set up the 2-lens system focusing
the laser beam to the CCD, the next step
was to mount the spherical reflector (31
 20190729_185214.jpg20190729_185156.jpg20190729_185153.jpg20190729_185139.jpg20190729_185112.jpg 
  237   Thu Aug 1 15:20:39 2019 Edita BytyqiLab InfrastructureOpticsReflector Mount and DC SupplyYesterday, we were able to take some data
using the 120 V DC power supply. The reflectors
cut at the focal point and radius were both
 20190731_170920.jpg20190801_145836.xcf20190801_145836.jpg20190801_150635.jpg20190801_145842.jpg 
  240   Mon Aug 12 21:15:12 2019 Edita BytyqiElectronics Determining heater/reflector focusI took images of the heat pattern projected
on a piece of paper produced by the semi-circle
reflector. I used 108V to drive current throught
 20190812_151316.jpg20190812_151258.jpg 
  241   Fri Aug 16 17:05:14 2019 Edita BytyqiElectronics FLIR Images of new reflector focusing heatWe got 11 new semi-circle cut reflectors
of radius ~3.6 cm. I glued a screw to the
back of one reflector using the same epoxy
  
  110   Thu Feb 24 10:23:31 2011 Christopher GuidoLaserLaserLTG initial noiseCheryl Vorvick, Chris Guido, Phil Willems
Attached is a PDF with some initial
noise testing. There are 5 spectrum plots
 LTG_InitialTest.pdf 
  215   Tue Jul 10 17:49:13 2018 Aria ChaderjianLaserGeneralJuly 10, 2018Went down to the lab and showed Rana the
setup. He's fine with me being down there
as long as I let someone know. He also recommended
 IMG_4518.jpgIMG_4517.jpg 
  216   Thu Jul 12 18:48:21 2018 Aria ChaderjianLaserGeneralJuly 12, 2018The beam reflecting off the test mirror
was clipping the lens between gold mirror
and test mirror, so I reconfigured some of
  
  217   Fri Jul 13 16:42:50 2018 Aria ChaderjianLaserGeneralJuly 13, 2018The table is set up. The HWS and SLED were
moved slightly, and a minimal angle between
the test mirror and HWS was achieved.
  
  218   Mon Jul 23 10:04:19 2018 Aria ChaderjianLaserGeneralJuly 20, 2018With Jon's help, I changed the setup
to include a mode-matching telescope built
from the f=60mm (1 inch diameter) lens and
 37767216_2077953269190954_5080703241788850176_n.jpg 
  219   Tue Jul 24 16:52:44 2018 Aria ChaderjianLaserGeneralJuly 23, 2018 and July 24, 2018Attached the grid array of the HWS.

Applied voltage (5V, 7V, 9.9V,
14V) to the heater pad and took measurements
  
  220   Fri Aug 3 15:46:12 2018 Aria ChaderjianLaserGeneralAugust 3, 2018To the best of my ability, calculated the
magnification of the plane of the test optic
relative to the HWS (2.3) and input this
  
  157   Tue Jun 5 17:25:43 2012 Alex MauneyMiscaLIGO Modeling6/5/12 Daily Summary- Had a meeting to talk about the basics
of LIGO (esp. TCS) and discuss the project
- Created COMSOL model for the test
  
  158   Wed Jun 6 16:54:09 2012 Alex MauneyMiscaLIGO Modeling6/6/12 Daily Summary- Got access to and started working with
SIS on Rigel1
- Fixed SVN issues
  
  160   Thu Jun 7 16:50:16 2012 Alex MauneyMiscaLIGO Modeling6/7/12 Daily Summary- Created a COMSOL model with thermal deformations
- Added non-symmetrical heating to
cause astigmatism
  
  162   Fri Jun 8 16:36:47 2012 Alex MauneyMiscaLIGO Modeling6/8/12 Daily Summary- Tried to fix COMSOL error using the (ts)
module, ended up emailing support as the
issue is new in 4.3
  
  164   Mon Jun 11 17:11:01 2012 Alex MauneyMiscaLIGO Modeling6/11/12 Daily Summary- Fixed the (ts) model, got strange results
that indicate that the antisymmetric heating
mode is much more prominent than previously
  
  166   Wed Jun 13 16:36:14 2012 Alex MauneyMiscaLIGO Modeling6/12 and 6/13 Daily Summary- Realized that the strange deformations
that we were seeing only occur on the face
nearest the ring heater, and not on the face
  
  168   Thu Jun 14 16:51:03 2012 Alex MauneyMiscaLIGO Modeling6/14/12 Daily Summary- Plugged the output of the model with
uniform heating into SIS using both modification
of the radius of curvature, and direct importation
 SIS_Outputs.txtAssymetric_Heating_Line_Graph.png 
  169   Mon Jun 18 16:30:36 2012 Alex MauneyMiscaLIGO Modeling6/18/12 Daily Summary- Verified that the SIS output does match
satisfy the equations for Gaussian beam propagation
- Investigated how changing the amount
  
  171   Tue Jun 19 16:24:52 2012 Alex MauneyMiscaLIGO Modeling6/19/12 Daily Summary- Did more modeling for different levels
of heating and different mesh densities for
the SIS input.
  
  172   Wed Jun 20 16:44:58 2012 Alex MauneyMiscaLIGO Modeling6/20/12 Daily Summary- Attended a lot of meetings (Safety, LIGO
Orientation)
- Finished draft of week 3 report
 TS_model_deformation_line_graph_2W_10%.pngTS_model_deformation_line_graph_2W_10%_sym.pngTS_model_deformation_line_graph_2W_10%_antisym.pngTS_model_deformation_contour_graph_2W_10%.pngHTSM_model_deformation_contour_graph_2W_10%.png 
  174   Thu Jun 21 16:54:45 2012 Alex MauneyMiscaLIGO Modeling6/21/12 Daily Summary- Paper edits and more data generation
for the paper (lower resolution grid data)
- Attended a talk on LIGO
  
  177   Wed Jun 27 16:43:56 2012 Alex MauneyMiscaLIGO Modeling6/27/12 Daily SummaryPlan for building the model
- Find the fields that would be incident
on the beam splitter from each arm (This
  
  178   Thu Jun 28 16:27:37 2012 Alex MauneyMiscaLIGO Modeling6/28/12 Daily Summary- Finished the MatLab code that both combines
two fields and simulates the adjustment of
the beamsplitter to minimize the power out
  
  180   Mon Jul 9 16:54:17 2012 Alex MauneyMiscaLIGO Modeling7/9/12 SummaryMade a COMSOL model that can include CO2
laser heating, self heating, and ring heating
Figured out how to run SIS out of
  
  142   Mon Apr 25 16:28:27 2011 Aidan, JoeComputingNetwork architectureFixed problem network drive fb1:/cvs on Ubuntu & CentOS machinesWith Joe's help we fixed the failure of
princess_sparkle to mount the
fb1:/cvs directory when relying
  
  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 
  1   Fri Nov 6 20:09:47 2009 AidanLaserLaserTest Does this work?   
  3   Mon Dec 28 14:48:29 2009 AidanComputingDAQVME crate has a "new" CPU - needs to be configured I installed a recycled VME crate in the
electronics rack. It currently has a Baja
4700E CPU card in it - and this needs to
 VME_boot_02.jpgVME_boot_01.JPGVME_boot_03.jpg 
  5   Tue Dec 29 17:50:57 2009 AidanComputingDAQVME crate has proper boot settingsWe fixed the start-up settings on the VME
crate to look for a TCS startup file on fb0.
The settings on the Baja 4700 are now:
 VME_tcs_boot_settings.jpg 
  6   Fri Jan 29 10:02:15 2010 AidanComputingDAQNew DAQ ordered On the advice of Ben Abbott, I've
ordered the Diamond Systems Athena II computer
w/DAQ, as well as an I/O board, solid state
  
  7   Thu Feb 4 14:05:59 2010 AidanElectronicsRing HeaterRing heater transfer function measurement 240mHz-5HzI've been trying to measure the ring heater
transfer function (current to emitted power)
by sweeping the supply voltage and measuring
  
  8   Thu Feb 4 15:26:37 2010 AidanElectronicsRing HeaterRing heater transfer function measurement 240mHz-5Hz

    
        
  
  9   Thu Feb 4 19:45:56 2010 AidanMiscRing HeaterRing heater transfer function - increasing collection areaI mounted the thinner Aluminium Watlow
heater inside a 14" long, 1" inner
diameter cylinder. The inner surface was
 low-emissivity-tube.jpg 
  12   Mon Feb 8 17:44:38 2010 AidanElectronicsPre-amplifierreplace Pot with fixed Resistor

    

       
            
  
  13   Thu Feb 11 18:04:08 2010 AidanLaserRing HeaterRing heater time constantI've been looking to see what the time
constant of the ring heater is. The attached
plot shows the voltage measured by the photodiode
  
  14   Thu Feb 11 21:46:23 2010 AidanElectronicsRing HeaterRing heater time constant measurement - start timeAfter leaving the ring heater off for several
hours I turned on a 40V, 0.2A supply at a
gps time of 949 988 700
  
  15   Fri Feb 12 11:39:28 2010 AidanElectronicsRing HeaterRing heater transfer functionI applied a step function to the silver
WATLOW heater and measured the response with
the photodiode. The power spectrum of the
 watlow_heater_transfer_fn.jpg 
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