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ID Date Author Typedown Category Subject Text Attachments
  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
  
  113   Thu Feb 24 14:23:58 2011 AidanLab InfrastructureHartmann sensorHartmann Sensor box cut down to size I reduced the height of the Hartmann
sensor box. This is what it looks like now:
 
 P1000109.jpgP1000110.jpgP1000111.jpgP1000113.jpg 
  126   Fri Mar 11 13:11:33 2011 AidanLab InfrastructureDelivery NoteMore Bosch connectors have arrived See attached delivery note ...  Packing_List_05.pdf 
  127   Wed Mar 16 15:05:47 2011 AidanLab InfrastructureDelivery NoteMore Bosch equipment has arrived30mm T-junctions, grounding straps and
T-slot covers have arrived

 Packing_List_06.pdf 
  143   Thu Apr 28 22:48:47 2011 AidanLab InfrastructureElectronicsBNC Cables from HWS table to rack I labelled and strung 8 of the 16
custom 40' BNC cables from L-Com between
the HWS table and the BNC feed-through on
  
  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 
  191   Fri Oct 13 15:52:41 2017 AidanLab InfrastructureGeneralBroadband mirror BB2-E03 reflectivity at 532nmI measured the reflectivity of a possible
HWS replacement mirror at 532nm. Thorlabs
BB2-EO3
 IMG_1223.JPGIMG_1213.JPG 
  225   Fri Feb 8 10:48:33 2019 AidanLab InfrastructureGeneralWater damage repair work in the TCS LabCaltech Facilities has determined that
the walls in the SE corner of the TCS Lab
in West Bridge were water damaged during
  
  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.
  
  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 
  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 
  242   Tue Sep 3 10:49:57 2019 AidanLab InfrastructureGeneralExhaust duct added for new bake area in TCS labFacilities came in on Friday and teed off
a new duct to provide exhaust for the proposed
new vacuum bake area in the TCS Lab. Photos
 IMG_1627.jpgIMG_1629.jpgIMG_1628.jpgIMG_1626.jpg 
  244   Tue Jun 15 08:47:27 2021 AidanLab InfrastructureGeneralCleaned up HWS table in preparation for lab moveI cleaned up the HWS table in preparation
for replacement with the 4x10 table. We still
need to move the cabinet and get the enclosure
 IMG_3056.jpg 
  247   Thu Aug 12 16:13:44 2021 AidanLab InfrastructureFloodCarpentry shop removed wet plaster sections from the wall - it's drying for a few daysThe carpentry shop removed wet plaster
sections from the wall following the flood
(process was gentle scraping of wet plaster
 IMG_4139.jpg 
  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

    
        
  
  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 
  
  12   Mon Feb 8 17:44:38 2010 AidanElectronicsPre-amplifierreplace Pot with fixed Resistor

    

       
            
  
  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 
  16   Fri Feb 12 21:00:06 2010 AidanElectronicsRing HeaterRing heater step function response - time seriesHideously slow internet at airport is making
me write a brief entry. This is the times
series of the hesilver watlow heater radiative
 silver_watlow_heater_step_function_response_2010-02-12.pdf 
  18   Mon Apr 12 17:25:01 2010 AidanElectronicsHartmann sensorFiber-Camera Link demonstration I installed the EDT PCIe4 DV C-Link
frame grabber in a spare Windows XP PC and
connected the Dalsa 1M60 camera directly
 hartmann_sensor.JPGFiber_Camera_Link_1.jpgFiber_Camera_Link_3.jpg 
  40   Thu May 20 10:44:13 2010 AidanElectronicsSLEDQPhotonics 980nm source powerdV = 0.385V
Responsivity= 0.65A/W
Transimpedance = 1.5E4 V/A
  
  41   Thu May 20 17:08:36 2010 AidanElectronicsSLEDSLED module - and driver - LIGO D1000892 - and Hartmann sensorVerified that the test-point for the current
limit pot on the driver (Wavelength Electronics
- LDTC 0520) was at 0.5V. Driver is set to
 2010-05-20_hartmann_image_and_located_spot.jpg 
  45   Thu May 27 08:25:37 2010 AidanElectronicsHartmann sensorHartmann sensor cooling fins added - base piece removed 8:10AM - I removed the base plate
from the Hartmann sensor. I want to know
what steady-state temperature the HWS achieves
 HWS_CONFIG2.jpg 
  46   Thu May 27 13:18:51 2010 AidanElectronicsHartmann sensorRemoved Cooling fins from Hartmann sensorI removed the cooling fins from the Hartmann
sensor to see what steady-state temperature
it reached without any passive cooling elements.
 HWS_CONFIG3.jpg 
  47   Thu May 27 15:42:06 2010 AidanElectronicsHartmann sensorHartmann sensor with just the base pieceI switched in just the base piece of the
Hartmann sensor. The cooling fins are removed.
I bolted the camera securely to the base
 HWS_CONFIG4.jpg 
  48   Thu May 27 17:49:02 2010 AidanElectronicsHartmann sensorHartmann sensor cooling fins added - base piece added Back to Configuration 1 again - this
time the fins were bolted very securely to
the camera.
 HWS_CONFIG1-tight.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:
  
  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 
  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 
  104   Tue Jan 25 16:38:16 2011 AidanElectronicsPre-amplifierL1 TCSY ISS Board transfer function I measured the AC and DC channel
transfer functions of the eLIGO L1 TCSY ISS
board for PD1 and PD2. The gain is quite
 L1TCS_ISS_boards_transfer_functions.pdfSRS003.78DSRS004.78DSRS005.78DSRS006.78D 
  105   Tue Feb 8 13:02:26 2011 AidanElectronicsDelivery NoteThorlabs S322C 200W power head arrived The 200W Thermopile power head from
Thorlabs arrive today. The scanned delivery
note and calibration info are attached.
 Co2_200W_power_meter_delviery_note.pdfCo2_200W_power_meter_calibration_info.pdf 
  109   Wed Feb 23 20:18:30 2011 AidanElectronicsHartmann sensorSuccessfully re-started the Hartmann sensor I reattached the Hartmann Sensor
to the LENOVO machine that is running Ubuntu
and turned it on (it's been disconnected
  
  119   Tue Mar 1 17:05:45 2011 AidanElectronicsHartmann sensorDalsa 1M60 current drawSteve and I measured the current drawn
by the Dalsa 1M60 by connecting it to the
BK Precision 1735 lab power supply that display
  
  150   Thu May 26 11:56:46 2011 AidanElectronicsLaserGreen Laser Pointer beam profileThis measurement was made with the Thorlabs
DCC1545M-GL camera with an RG850 3mm long-pass
filter over the CCD.
 green_laser_pointer.bmpgreen_laser_pointer.pdfScreen_shot_2011-05-26_at_12.28.20_PM.png 
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