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New entries since:Wed Dec 31 16:00:00 1969
ID Date Authorup Type Category Subject Text Attachments
  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 
  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 
  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 
  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 
  229   Mon Jun 17 20:29:34 2019 JonLab InfrastructureComputingServer rack cleaned up, new workstation installedIn anticipation of the point absorber SURF
project, I cleaned up the server rack and
installed a new workstation today.
 IMG_3419.jpg 
  230   Tue Jun 18 19:05:16 2019 JonLab InfrastructureGeneralLarge optical table cleared and set up for point absorbersAidan and I continued the lab clean-up
today. There's still more to do, but
we did fully clear the large optical table
 IMG_3421.jpg 
  231   Mon Jul 22 09:44:21 2019 JonLab InfrastructureComputingInstalled Amplifying VGA SplitterThe VGA signal outputted by the multiplexer
is too weak to drive two monitors. This has
required video cables to be manually switched
 IMG_3522.jpgIMG_3421.jpg 
  235   Thu Jul 25 09:13:36 2019 JonThings to BuyGeneralNeed to Order GlovesNew gloves are ordered for the TCS and
QIL labs. They arrive tomorrow (Friday).

  
  238   Tue Aug 6 19:22:28 2019 JonElectronicsComputingQIL NFS server set upI've started building the NFS server
for the QIL cymac. It's sitting on the
workbench in the TCS lab next to the rack.
  
  239   Fri Aug 9 20:33:11 2019 JonElectronicsRing HeaterPower-regulated heater ready to useDespite some considerable time spent,
I was not able to get the Omega SCR controllers
working. The first unit definitely arrived
 IMG_3576.jpgIMG_3577.jpg 
  243   Wed Oct 30 12:13:14 2019 JonMiscDelivery NoteNew lab hardwareIan and I moved some new hardware into
the lab, shown in the below photos. It is
from the shipment of loaned
 IMG_3782.jpgIMG_3783.jpgIMG_3784.jpgIMG_3785.jpg 
  189   Wed Oct 11 19:14:16 2017 Jon RichardsonComputingElectronicsReplaced TCS MonitorI replaced the dead 24" monitor on
the work bench, which is connected to the
video multiplexer. Mike Pedraza was
  
  190   Wed Oct 11 20:19:06 2017 Jon RichardsonLab InfrastructureHartmann sensorInitial Characterization of the SRM Adaptive Wavefront ControlToday I made the first characterization
measurements of the mocked-up adaptive wavefront
control system planned for the signal recycling
 thermal_lens.png 
  192   Fri Oct 13 18:35:29 2017 Jon RichardsonComputingElectronicsInstalled Maku Ethernet CCD CameraI installed the Maku Gigabit CCD camera
driver software on the hws-ws machine. The
camera viewer can be opened from the terminal
 IMG_2287.JPG 
  193   Mon Oct 23 19:02:42 2017 Jon RichardsonLaserHartmann sensorMitigated Heating Beam LossesThere were known to be huge (65%) heating
beam power losses on the SRM AWC table, somewhere
between the CO2 laser and the test optic.
  
  194   Tue Oct 24 10:19:53 2017 Jon RichardsonComputingElectronicsInstalled Maku Ethernet CCD CameraThere is an SDK for the camera with compiled
examples. For a really quick image grab from
the command line, use the following:
  
  195   Tue Oct 24 15:05:57 2017 Jon RichardsonComputingElectronicsInstalled a Realtime Beam Profiler for the Mako CCD CameraAidan found a C demo code for acquiring
a single image from the Mako CCD camera and
saving it to disk (SynchronousGrab -- aliased
  
  196   Wed Oct 25 15:34:14 2017 Jon RichardsonComputingFrame GrabberMako CCD Camera Code is FixedI fixed a bug in how the raw Mako CCD camera
images are being read into memory. The bmp
files turn out to have a block memory layout
  
  200   Mon Oct 30 17:13:32 2017 Jon RichardsonLaserHartmann sensorWrite-Up of CO2 Projector MeasurementsFor archive purposes, attached is a write-up
of all the HWS measurements I've made
to date for the SRM CO2 projector mock-up.
 awc_srm_actuator_v1.pdf 
  203   Tue Nov 14 19:08:00 2017 Jon RichardsonComputingNetwork architectureRsync Server for Automatic LDAS BackupsI implemented an access point for LDAS
to pull data from the TCS lab EPICS frame
archive (fb4:/frames) via rsync. The setup
  
  204   Thu Jan 18 10:09:50 2018 Jon RichardsonLaserGeneralRIN Measurement of 400 mW CO2 Laser in ProgressThe 400 mW CO2 laser on the Hartmann table
is currently configured for a measurement
of its relative intensity noise. It is aligned
  
  205   Mon Jan 22 10:39:32 2018 Jon RichardsonLaserGeneralRIN Measurement of 400 mW CO2 Laser in ProgressAttached for reference is the RIN measurement
from the initial data.

 SRM_CO2_RIN_v1.pdf 
  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 
  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 
  2   Thu Dec 10 22:23:47 2009 Not AidanLaserLaserTestYes.


  
  49   Tue Jun 15 16:30:10 2010 Peter VeitchMiscHartmann sensorSpot displacement maps - temperate sensitivity testsResults of initial measurement of temperature
sensitivity of Hartmann sensor
"Cold" images were taken
 spot_displacements_same_temp_0611.jpgspot_displacements_diff_temp_0611.jpg 
  125   Wed Mar 9 01:00:12 2011 Peter Veitch, Won KimComputingHartmann sensorControl of frame rate usign external triggerWe managed to successfully apply frame
rate control via external trigger from a
pulse generator.
  
  107   Fri Feb 18 14:53:50 2011 PhilLaserLaserLTG laser delivering specified powerI got the LTG CO2 laser to deliver 50.02W
as measured by the Thorlabs 200W power head
today. This required running the Glassman
  
  10   Fri Feb 5 12:42:19 2010 SteveElectronicsPre-amplifierChanges to boardTest entry   
  11   Mon Feb 8 10:45:50 2010 Steve O'ConnorElectronicsPre-amplifierreplace Pot with fixed Resistor 
  
  101   Tue Nov 23 06:15:08 2010 WonComputingHartmann sensorImage folder structureAttached below is a diagram that describes
the organisation of image folders that I
am using at the moment with Run_initialize
 image_folders.png 
  120   Thu Mar 3 07:30:18 2011 WonComputingHartmann sensorEffect of high pixel count on rmsWe have been investigating how pixel count
is related to the centroid displacements
by taking several sets of image frames with
 11x 
  131   Fri Apr 1 02:41:55 2011 WonComputingHartmann sensorexposure time and reproducibility of centroids Here is a brief and preliminary summary
of rms of centroid displacements calculated
at a number of different exposure time values.
 9x 
  144   Tue May 10 00:55:08 2011 WonComputingHartmann sensorMatlab Compiler and Matlab Compiler Runtime 
I have spent some time with Matlab
Compiler and Matlab Compiler Runtime (MCR).
  
  19   Thu Apr 15 01:47:47 2010 Won KimComputingHartmann sensorNotes on installing EDT PCIe4 DV frame grabber* EDT PCIe4 DV frame grabber: installation
notes for linux system 
  
  22   Thu Apr 22 01:48:33 2010 Won KimComputingFrame Grabberfrom the manual install.pdf 
Regarding the installation of EDT
software, I overlooked a note from the install.pdf
  
  34   Thu May 6 21:32:26 2010 Won KimComputingHartmann sensorPeak detection and centroiding code 
 
 detect_peaks_uml.m 
  100   Thu Nov 4 13:31:19 2010 Won KimComputingHartmann sensorFrame Grabber SDK installation Appended
below is the step by step procedure that
  
  181   Mon May 13 14:09:02 2013 ZachComputingDAQC2ATF model rebuilt ATF:1812   
  226   Fri Apr 12 17:40:58 2019 aaronLab InfrastructureGeneralMeasurements for Bake StationI drew up one way we could set up the three
available bake ovens in the TCS lab on the
single oil pump. 
 BakeStation_Page_1.jpgBakeStation_Page_2.jpg 
  227   Mon Apr 15 08:12:58 2019 aaronLab InfrastructureGeneralMeasurements for Bake StationMy preference is to have tubes back towards
the wall where possible. We might be able
to drill a large diameter hole in the table
  
  228   Thu May 23 11:36:49 2019 aguptaLab InfrastructureBorrowedBorrowed Label MakerI have borrowed TCS's label maker in
CTN for few days. If you need it, you can
take it from the top of blue cabinets.
  
  187   Thu Jul 13 10:11:57 2017 awadeElectronicsBorrowedBorrowed newport TrueRMS SupermeterI lent your fancy Newport TrueRMS Supermeter
with the thermocouple plugs on the top to
the SURF student Jordon.  He has it
 2017-07-13_10.06.28.jpg2017-07-13_10.06.29.jpg 
  188   Thu Sep 21 18:56:53 2017 awadeMiscBorrowedBorrowed thorlabs power meterBorrowed thorlabs power meter on 21 Sep
2017.  It is on the south table of the
ATF lab.
  
  212   Wed May 30 18:50:05 2018 awadeComputingDAQRebooted fb4Time was still off by nine days as of yesterday. 
I tried rebooting remotely to see if time
would correct to system clock.  It didn't
  
  213   Wed May 30 18:59:49 2018 awadeComputingDAQFB4 ip address has changedMaybe you've resolved this now. I moved
the DHCP allocation to 10.0.1.160 and
above around that time because a bunch of
  
  222   Wed Oct 17 16:17:45 2018 awade, AidanComputingDAQAdded AWC thermocouple reader back to acromag1Acromag IOC process was removed from PSL
lab acromag1 computer a few months ago. 
Aidan needs them again but it would be better
 TCSIOCFILS.tar.gz 
  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 
  156   Tue Nov 29 09:13:49 2011 ranaMiscLIGO 3GSwitching from CO2 to shorter wavelength solid state laser Around a year ago, Phil and I discussed
the possibility of using an OPO to possibly
generate our own laser beam at ~2 microns
  
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