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ID Date Author Type Categoryup Subject Text Attachments
  372   Fri Aug 23 11:11:44 2019 shrutiOpticsCharacterizationFinding the curvature bottomI attempted to fit the data taken
by Koji of the beam spot precession at the
CCD in order to find the location of the
 CircleFit.pdfSineFit.pdf 
  373   Thu Aug 29 11:51:49 2019 shrutiOpticsCharacterizationWedging of the debonded PZTs - CalculationUsing the measurements of PZTs 12,13 taken
by Stephen, I estimated the wedging angle
and orientation following Section 2.3.1 of
 PZT_Wedging_Results.pdfPZT_Wedging_Calc.pdf 
  395   Thu Oct 8 19:55:22 2020 KojiGeneralCharacterizationPower Measurement of Mephisto 800NE 1166AThe output of Mephisto 800NE (former TNI
laser) was measured.
The output power was measured with
 Mephisto800NE_1166A.pdf 
  402   Sat Nov 21 13:58:30 2020 KojiElectronicsCharacterizationDark Current Measurement for InGaAs QPDsDark current measurement for InGaAs QPDs
(OSI FCI-InGaAs-Q3000) has been done using
Keithley 2450 and Frank's diode test
 Q3000_dark_current.pdf 
  403   Sun Nov 22 13:49:12 2020 KojiElectronicsCharacterizationImpedance Measurement for InGaAs QPDsTo know any anomaly to the junction
capacitance of the QPD segments, the RF impedances
were tested with a hand-made impedance measurement.
 impedance_measurement.pdfP_20201121_183830.jpgimpedance_test.pdfQ3000_impedance_test.pdf 
  404   Mon Nov 23 23:17:19 2020 KojiElectronicsCharacterizationThe dark noise of the Q3000 QPDsThe dark noise levels of the four Q3000
QPDs were measured with FEMTO DLPCA200 low
noise transimpedance amp.
 Q3000_dark_noise_81.pdfQ3000_dark_noise_82.pdfQ3000_dark_noise_83.pdfQ3000_dark_noise_84.pdf 
  405   Tue Nov 24 10:45:07 2020 gautamElectronicsCharacterizationThe dark noise of the Q3000 QPDsI see that these measurements are done
out to 100 kHz - I guess there is no reason
to suspect anything at 55 MHz which is where
  
  406   Tue Nov 24 12:27:18 2020 KojiElectronicsCharacterizationThe dark noise of the Q3000 QPDsThe amplifier BW was 400kHz at the gain
of 1e7 V/A. And the max BW is 500kHz even
at a lower gain. I have to setup something
  
  454   Mon Nov 14 08:34:45 2022 CamilleOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)[Camille, Koji]

Friday, Nov 11th, 2022

Setting up OMC #1 for transmission
 PXL_20221111_200942943.jpgPXL_20221111_200957951.jpg 
  455   Mon Nov 14 09:27:13 2022 KojiOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)The measured total optical loss of the
OMC was

1st:   0.015 +/- 0.003
 OMC_Powerbudget.xlsx 
  460   Thu Nov 17 19:50:00 2022 KojiOpticsCharacterizationConclusion on the cleaning of OMC #001Conclusion on the cleaning of OMC
#001

- After a couple of first contact
 OMC_loss.pdf 
  464   Fri Dec 2 11:42:03 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminants[Camille, Koji] Log of the work
on Nov 30, 2022

 


The
following is the notes from GariLynn




 PXL_20221130_234101575.jpgPXL_20221130_234013958.jpgPXL_20221201_021727724.jpgScreen_Shot_2022-12-02_at_12.43.02.png 
  465   Fri Dec 2 12:38:15 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminantsAnother set of FC cleaning was applied
to FM1/FM2/CM1/CM2 and SM2. Some FC strings
are visible on SM2. So I decided to clean
 PXL_20221202_034932211.jpgOMC_loss.pdf 
  466   Fri Dec 2 23:58:33 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminantsThe second trial of the water scrub

A bright scatter is visible on
FM1, so I tried water scrub on FM1. This
 PXL_20221203_063327268.jpgOMC_loss.pdf 
  468   Fri Dec 9 13:13:13 2022 KojiOpticsCharacterizationFSR/TMS/Spot Positions/Transmission[Camille Koji]

We quickly measured the basic parameters
of the OMC as is.
 HOM_plot_PZT.pdfOMC4_spot.pngPXL_20221208_233706115.jpg 
  469   Mon Dec 12 19:04:40 2022 KojiOpticsCharacterizationFSR/TMS/Spot Positions/Transmission 2nd trial[Camille Koji]

We replaced CM2 with a PZT mirror
subassembly serialized by PZT "13"
 PXL_20221212_235351320.jpgOMC4_spot.pngHOM_plot_PZT.pdfPXL_20221213_000406843.jpgScreen_Shot_2022-12-12_at_19.36.10.png 
  470   Mon Dec 19 18:51:50 2022 KojiOpticsCharacterizationTMS measurement with the PZT voltages altered[Camille, Koji] Log of
the work on Dec 15, 2023

The vertical and horizontal
 Cav_scan_response_PZT1_0_Pitch.pdfCav_scan_response_PZT1_0_Yaw.pdfOMC_20221215.pdfHOM_plot_PZT0_0.pdfHOM_PZTV_PZT1_0V.pdf 
  4   Wed Jun 20 20:37:45 2012 ZachOpticsConfigurationTopology / parameter selectionEDIT (ZK): All the plots here were generated  8x 
  5   Thu Jun 21 03:07:27 2012 ZachOpticsConfigurationParameter selection / mode definitionEDIT 2 (ZK): As with the   geom_bowtie.pnggeom_non-bowtie.png 
  36   Thu Nov 8 19:47:55 2012 KojiElectronicsConfigurationSolder for PZTsRich saids:
I
  
  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)
  
  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 
  63   Thu Feb 21 18:44:18 2013 KojiOpticsConfigurationPerpendicularity testPerpendicularity test of the mounting
prisms:
The perpendicularity of the prism
 perpendicularity_test.pdfP2203206.JPG 
  64   Wed Feb 27 18:18:48 2013 KojiOpticsConfigurationMore perpendicularity testMounting Prisms:
(criteria: 30arcsec = 145urad =>
0.36mm spot shift)
  
  65   Fri Mar 1 23:06:15 2013 KojiOpticsConfigurationMore perpendicularity test finalPerpendicularity of the "E" mirror
was measured.

Mounting Prisms:
  
  86   Thu Mar 28 03:37:07 2013 ZachOpticsConfigurationTest setup input optics progress[Lisa, Zach]
Last night (Tuesday), I finished
setting up and aligning most of the input
 OMC_test_setup_IO.jpg2013-03-27_05.48.20.jpg2013-03-28_02.29.36.jpg 
  87   Fri Mar 29 08:55:00 2013 ZachOpticsConfigurationBeam launched into fiber

    

       
            
  
  94   Thu Apr 4 00:35:42 2013 ZachOpticsConfigurationMMT installed on breadboard, periscope built[Koji, Zach]
 2013-04-03_23.43.00.jpg 
  97   Thu Apr 4 23:44:52 2013 KojiOpticsConfigurationBeam launched into fiberWe had to move our flipper mirror to share
the beam between Peter's setup and ours as
our flipper is at the place where the ISS
  
  99   Fri Apr 5 18:18:36 2013 ZachOpticsConfigurationAOM probably broken

    

       
            
 Isomet_1250C_zin_4_5_13.png 
  103   Mon Apr 8 20:56:52 2013 KojiOpticsConfigurationPZT & Curverd Mirror arrangementAssembly #1:
Mounting Prism #16
PZT #26
 PZT_assembly.pdf 
  105   Mon Apr 8 23:42:33 2013 KojiOpticsConfigurationFake OMC roughly alignedMode matching:
 
 beam_profile.pdfmode_matching.pdf 
  107   Wed Apr 10 00:40:30 2013 ZachOpticsConfigurationfauxMC locked[Koji, Zach]
 fauxMC_labeled.jpg 
  113   Tue Apr 16 09:43:58 2013 KojiOpticsConfigurationMirror list for L1OMCL1 OMC
Cavity Mirrors
FM1 (input coupler): A8
 OMC_breadboard_mirror_config.png 
  135   Mon Jun 3 18:58:08 2013 KojiOpticsConfigurationOMC final tests- QPD mount aligned, QPD output checked
  The spots are with 100um from
the center of the diodes. [ELOG
  
  151   Fri Aug 16 15:31:17 2013 KojiOpticsConfigurationMirror list for OMC(002)OMC(002)

Cavity Mirrors

FM1 (input coupler): A9
  
  156   Thu Aug 22 15:40:15 2013 KojiElectronicsConfigurationPZT endurance test[Koji, Jeff]
Background
In response to the failure of one
 P8214340.jpgP8214337.jpgIR_0457.jpgIR_0461.jpg 
  157   Fri Aug 23 19:24:32 2013 KojiElectronicsConfigurationPZT endurance test (II)The
PZT tests were finished with the conclusion
that the PZT won't be damaged with our expected
 PZT_shaking.png 
  261   Fri Jun 10 17:12:57 2016 KojiGeneralConfigurationL1 OMC DCPD replacementNew DCPD(T) = A1-23
DCPD(T) = DCPDB: extracted and accomodated
in CAGE-G SLOT1
  
  263   Fri Aug 12 14:58:17 2016 KojiGeneralConfigurationH1 OMC DCPD replacement Preparation of 3rd OMC for the
use in H1

New DCPD(T) = B1-01
  
  277   Tue May 16 19:05:18 2017 KojiOpticsConfigurationOMC SN002 fix - temporary opticsWorking on the SN002 OMC fix. Checked the
inventory. I think I am using C8 mirror as
the new temporary CM1 and PZT24 as the new
  
  278   Fri May 26 21:53:20 2017 KojiGeneralConfigurationTrans RF PD setupRecent work

- DC output of the trans RF PD
was connected to the BNC patch panel. =>
  
  279   Tue Jun 6 00:49:48 2017 KojiGeneralConfigurationTrans RF PD setupLast week, I further worked on the RF system
to install 20dB coupler on the agilent unit
and setup the R channel. This allowed me
  
  280   Tue Jun 6 22:00:36 2017 KojiGeneralConfigurationTrans RF PD setup- Replaced the PZT with the one used from
the beginning. This must be PZT #21. After
the replacement, the spot positions look
  
  328   Thu Apr 11 12:15:31 2019 KojiMechanicsConfigurationPZT sub assy mirror orientations   PZT_subassy.pngPZT_subassy.pdf 
  338   Tue Apr 16 16:35:09 2019 KojiOpticsConfigurationOMC(004): Glass breadboard selectionD1200105 SN006 was selected as
the breadboard for OMC(004).
The reason is the best parallelism
 BB_selection.pdf 
  339   Tue Apr 16 16:40:26 2019 KojiGeneralConfigurationOMC(004): A Mirror selectionWe are going to use A5 and A14
for FM1 and FM2. (The role of these
two can be swapped)
 A_Mirror_selection.pdf 
  340   Tue Apr 16 16:52:36 2019 KojiOpticsConfigurationOMC(004): B Mirror selectionWe are going to use B6 for the
DCPD BS (BS2), and B1 for the QPD BS (BS3).
Their role can not
 B_Mirror_selection.pdf 
  341   Tue Apr 16 17:24:56 2019 KojiOpticsConfigurationOMC(004): E Mirror selectionWe are going to use E6, E9, E11, and E14
for BS1, SM1, SM2, and SM3. They (and E18)
are all very similar.
 E_Mirror_selection.pdf 
  353   Tue Apr 23 10:21:12 2019 JoeOpticsConfigurationMoving the spots to the centre of the curved mirrors[Koji,Philip, Liyuan, Joe]

CM1:

We moved the curved mirrors to
 FSR_detuned_locking.pdfCM1_IMG_7702.JPGCM2_IMG_7704.JPG 
ELOG V3.1.3-