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ID Date Author Type Category Subject Text Attachments
  78   Sat Mar 23 16:36:15 2013 KojiElectronicsCharacterizationDiode QE measurementQuantum efficiencies of the C30665GH
diodes were measured. 
- The diode was biased by the FEMTO		  P3213308.JPGP3213310.JPG 
  77   Sat Mar 23 13:34:14 2013 KojiOpticsGeneralPZT assembly prototype glued 
Prototype
PZT assembly		  P3223322.jpgP3223323.jpgP3233336.jpgP3233348.jpg 
  76   Sat Mar 23 02:41:00 2013 KojiOpticsGeneralBlack glass beam dumps for the first OMCReceived black glass beam dumps from
MIT
- gluing by EP30-2 looks pretty fine.		  P3223314.JPGP3223319.jpgP3223320.jpg 
  75   Sat Mar 23 02:32:23 2013 KojiFacilityGeneralN2 cylinder deliveredPreparation for ionized N2 blow
- 99.9998% N2 cylinder delivered
(ALPHAGAZ 2 grade by AIR LIQUIDE) ALPHAGAZ		  P3233349.jpg 
  74   Wed Mar 20 09:38:02 2013 ZachOpticsCharacterization[LLO] OMC test bench modified For various reasons, I had to switch
NPROs (from the LightWave 126 to the Innolight
Prometheus).		  new_setup_traced.jpg 
  73   Sun Mar 17 21:59:47 2013 KojiElectronicsCharacterizationDiode testing ~ DCPD- For the dark noise measurement, the lid
of the die-cast case should also contact
to the box for better shielding. This made		  OMCPD_TEST_130317.pdf 
  72   Fri Mar 15 02:15:45 2013 KojiElectronicsCharacterizationDiode testingDiode testing
o Purpose of the measurement
- Test Si QPDs (C30845EH) for ISC		  QPD_GR_TEST_130316.pdf 
  71   Thu Mar 14 22:18:23 2013 KojiGeneralGeneralNew loans for the diode testALL
returned

Loan
from ATF:		   
  70   Thu Mar 14 17:06:21 2013 KojiMechanicsGeneralOMC SUS work @LLOEDIT (ZK): All photos on
Picasa. Also, I discovered that		  2013-03-14_16.03.40.jpg2013-03-14_16.04.07.jpg 
  69   Thu Mar 7 15:53:47 2013 KojiMechanicsGeneralOMC Transportation fixture, OMC PD/QPD mounts   P3073218.JPGP3073219.JPGP3073223.JPGP3073225.JPGP3073227.JPG 
  68   Wed Mar 6 23:24:58 2013 ZachOpticsCharacterizationeLIGO OMC visibility vs. power measurement detailsI found that, in fact, I had lowered
the modulation depth since when I measured
it to be 0.45 rads --> Psb = 0.1.		  TEK00005.PNGTEK00007.PNGeOMC_visibility_3_4_13.pngeOMC_AMTF_vs_power_3_6_13.png 
  67   Tue Mar 5 19:37:00 2013 ZachOpticsCharacterizationeLIGO OMC visibility vs. power measurement detailsEDIT (ZK): Koji points out that (1 -
Ti) should really be the non-resonant reflectivity
of the aligned cavity, which is much closer		  eOMC_visibility_3_4_13.png 
  66   Fri Mar 1 23:52:18 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMeasurement:

    E1:   α = 
0.672 deg, β = +0.0  arcmin (0 div up)
  
  65   Fri Mar 1 23:06:15 2013 KojiOpticsConfigurationMore perpendicularity test finalPerpendicularity of the "E" mirror
was measured.

Mounting Prisms:		   
  64   Wed Feb 27 18:18:48 2013 KojiOpticsConfigurationMore perpendicularity testMounting Prisms:
(criteria: 30arcsec = 145urad =>
0.36mm spot shift)		   
  63   Thu Feb 21 18:44:18 2013 KojiOpticsConfigurationPerpendicularity testPerpendicularity test of the mounting
prisms:
The perpendicularity of the prism		  perpendicularity_test.pdfP2203206.JPG 
  62   Thu Feb 7 23:01:45 2013 KojiOpticsCharacterizationUV epoxy gluing test [Jeff, Yuta, Koji]
Gluing test with UV-cure epoxy
Optocast 3553-LV-UTF-HM		   
  61   Thu Feb 7 21:35:46 2013 KojiGeneralGeneralDmass's loan of LB1005 / A2&C2 sent to Fullerton / First Contact @40mDmass
borrowed the LB1005 servo amp from the OMC
lab.		  P2053119.jpgP2053120.JPG 
  60   Wed Feb 6 02:34:10 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMeasurement:

    A6:   α
= 0.665 deg, β = +3.0 arcmin (1.5 div		   
  59   Mon Feb 4 00:39:08 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMethod:

    Mount the tombstone prism
on the prism mount. The mount is fixed on		  autocollimator_wedge_measurement.pdf 
  58   Tue Jan 22 17:56:32 2013 KojiMechanicsGeneralRotary stage selectionNewport UTR80

    Sensitivity: 4 arcsec
  
  57   Tue Jan 22 11:10:25 2013 KojiFacilityGeneralEyeware storage and hooks for the face shields are installedA carpenter has come to install the eyeware
storage and hooks for the face shields.		  P1223116.JPG 
  56   Sat Jan 19 20:47:41 2013 KojiOpticsCharacterizationWedge measurement with the autocollimatorThe wedge angle of the prism "A1"
was measured with the autocollimator (AC).
The range of the AC is 40 arcmin.		  autocollimator_wedge_measurement.pdf 
  55   Fri Jan 18 13:25:17 2013 KojiOpticsConfigurationAutocollimator calibrationAn autocollimator (AC) should show (0,0)
if a retroreflector is placed in front of
the AC.		  autocollimator_calibration.pdf 
  54   Wed Jan 16 14:10:50 2013 KojiOpticsCharacterizationAutocollimator tests of optics perpendicularity/parallelismThe
items:
- Autocollimator (AC) borrowed from		   
  53   Thu Jan 10 18:37:50 2013 KojiOpticsCharacterizationWedging of the PZTsYesterday I measured the thickness of the
PZTs in order to get an idea how much the
PZTs are wedged.		  PZT_wedging.pdf 
  52   Sun Jan 6 23:22:21 2013 KojiMechanicsGeneralSolidWorks model of the OMC suspension    D0900295_AdvLIGO_SUS_Output_Mode_Cleaner_Overall_Assembly.pngD0900295_AdvLIGO_SUS_Output_Mode_Cleaner_Overall_Assembly.easm 
  51   Wed Jan 2 07:45:39 2013 KojiOpticsCharacterizationFirst Contact testConclusion:
Good. First contact did not damage the coating
surface, and reduced the loss		  Cav_scan_response_zoom_20121125_C2_before.pdfCav_scan_response_zoom_20121125_C2_after.pdf 
  50   Wed Jan 2 07:35:55 2013 KojiOpticsCharacterizationThickness of a curved mirrorMeasured the thickness of a curved mirror:
Took three points separated by 120
degree.		   
  49   Mon Dec 31 03:11:45 2012 KojiOpticsCharacterizationFurther more RoC measurementTotal (excluding C2, C7, C8): 2.575 +/-
0.005 [m]
New results		  Cav_scan_response_zoom_20121125_C6_9.pdf 
  48   Mon Dec 31 03:10:09 2012 KojiOpticsGeneralSolidWorks model of the OMC breadboard   D1201439_aLIGO_Breadboard_layout_assy_121224.pngD1201439_aLIGO_Breadboard_layout_assy_130105.easm 
  47   Mon Dec 31 01:45:04 2012 KojiGeneralGeneralWork completed in Nov and Dec [!]Completed work of the previous months:
[Jul]
[Aug]		   
  46   Wed Dec 26 14:33:33 2012 KojiFacilityGeneralLase Interlock wiredTwo switches are connected in series.  PC263073.jpgPC263074.jpgPC263075.jpg 
  45   Wed Dec 19 18:47:03 2012 KojiCleanGeneralFirst Contact Training with MargotSteve and I visited Margot to have a training
session for application of First Contact
on optics.		   
  44   Tue Dec 18 20:04:40 2012 KojiOpticsCharacterizationPrism Thickness MeasurementThe thicknesses of the prism mirrors (A1-A5)
were measured with micrometer thickness gauge.
Since the thickness of the thinner		  prism.png 
  43   Thu Nov 29 21:18:23 2012 KojiOpticsGeneralOMC Mounting Prisms have come   PB293030.JPGPB293032.JPG 
  42   Mon Nov 26 01:40:00 2012 KojiOpticsCharacterizationMore RoC measurementC1: RoC: 2.57845 +/− 4.2e−05m
 RoC_measurement.pdf 
  41   Mon Nov 19 13:33:14 2012 KojiOpticsCharacterizationResuming testing mirror RoCsIn order to resume testing the curvatures
of the mirrors, the same mirror as the previous
one was tested.		  Cav_scan_response_zoom_20121016.pdf 
  40   Sat Nov 17 02:31:34 2012 KojiOpticsCharacterizationMirror T testMirror T test
The mirror was misaligned to have
~2deg incident (mistakenly...) angle.		   
  39   Fri Nov 9 00:43:32 2012 KojiOpticsCharacterizationFurther more wedge measurementNow it's enough for the first OMC (or even
second one too).
Today's measurements all distributed		  wedge_measurement_overall.pdf121108a_A1.pdf 
  38   Thu Nov 8 20:12:10 2012 KojiOpticsConfigurationHow many glass components we need for a plateOptical prisms 50pcs (A14+B12+C6+E18)
Curved Mirrors 25pcs (C13+D12)
  
  37   Thu Nov 8 19:52:57 2012 KojiOpticsGeneralHow to apply UV epoxyKA's question:
Do		  UVepoxy.jpg 
  36   Thu Nov 8 19:47:55 2012 KojiElectronicsConfigurationSolder for PZTsRich saids:
I		   
  35   Thu Nov 8 13:24:53 2012 KojiOpticsCharacterizationMore wedge measurementA1
Horiz Wedge    0.497   
+/-    0.004 deg		  wedge_measurement_overall.pdf 
  34   Wed Nov 7 20:44:11 2012 KojiGeneralGeneralPlan Update: November [!]Completed work of the previous months:
[Jul]
[Aug]		  OMC_Project_Schedule.pdf 
  33   Wed Nov 7 20:21:42 2012 KojiGeneralGeneralWork completed in October [!]Completed work of the previous months:
[Jul]
[Aug]		   
  32   Wed Nov 7 01:28:20 2012 KojiOpticsCharacterizationWedge angle test (A1)Wedge
angle test
Result: Wedge angle of Prism A1:		  wedge_measurement.pngwedge_measurement_setup.png 
  31   Thu Oct 18 20:23:33 2012 KojiOpticsCharacterizationImproved measurementSignificant
improvement has been achieved in the RoC		  Cav_scan_response_zoom_20121017.pdfdetailed_RoC_setup.pdf 
  30   Wed Oct 17 20:36:04 2012 KojiOpticsGeneralRoC test cavity lockedThe RoC test setup has been built on
the optical table at ATF.
 detailed_RoC_setup.pdfomc_cav_lock_SCRN_SHOT.pngCav_scan_response_20121016.pdf 
  29   Tue Oct 16 15:51:01 2012 KojiGeneralGeneralPlan Update: October [!]Completed work of the previous months:
[Jul]
[Aug]		   
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