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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Category Subjectdown Text Attachments
  154   Wed Aug 21 08:31:21 2013 KojiOpticsCharacterizationH1 OMC cavity alignmentAlignment of the H1 OMC cavity mirrors
- The cavity mirrors as well as the
first steering mirror were aligned on the
  
  170   Mon Oct 14 15:50:55 2013 KojiOpticsCharacterizationH1 OMC Power budgetLHO OMC power budget

    
 OMC_power_budget.pdf 
  169   Mon Oct 14 13:40:16 2013 KojiOpticsCharacterizationH1 OMC Optical testingSince the middle of September, the optical
tests of H1 OMC were took place.
Here is summary of the progress.
  
  164   Fri Aug 30 12:25:29 2013 KojiGeneralGeneralH1 OMC Invar mount gluingThe Invar Mounting Blocks were glued on
the breadboard.
Serial number #1/2/5/6/7/8 ->
 P8304368.JPGP8304370.JPG 
  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
  
  162   Fri Aug 30 12:22:56 2013 KojiOpticsGeneralH1 OMC Cavity side UV gluingH1 OMC Cavity side optics was glued
on the breadboard
  
  161   Fri Aug 30 12:14:50 2013 KojiOpticsGeneralH1 OMC Cavity length adjustmentShort
conclusion: 
The roundtrip cavity length for
 Gouy_FSR_130827.nb.zipP8284343.jpg 
  391   Mon Aug 10 15:34:04 2020 KojiFacilityLoan / LendingGlue bake ovenBlack and Decker Glue Baking Oven came
back to the OMC lab on Aug 10, 2020, Georgia
had lent the unit for the SAMS assembly/testing.
  
  249   Tue Dec 29 12:15:46 2015 KojiGeneralGeneralGlasgow polarizer passed to KateThe Glasgow polarizer was passed to Kate
on Dec 17, 2015.
  
  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 
  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 
  112   Tue Apr 16 08:12:14 2013 KojiOpticsCharacterizationFurther More Mirror T measurementT&Rs of the B mirrors and some of the
E mirrors are measured.
I found that 
  
  114   Tue Apr 16 23:26:51 2013 KojiOpticsCharacterizationFurther More Mirror T measurementSince the previous measurement showed too
high loss, the optical setup was checked.
It seemed that a PBS right before
  
  14   Wed Aug 1 19:35:00 2012 KojiFacilityGeneralFloor cleaned / Workbench being built / Table top defect-
The floor of the room was cleaned and waxed!
-
 P8011949.JPGP8011947.JPGP8011948.JPG 
  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 
  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.
  
  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 
  105   Mon Apr 8 23:42:33 2013 KojiOpticsConfigurationFake OMC roughly alignedMode matching:
 
 beam_profile.pdfmode_matching.pdf 
  88   Mon Apr 1 03:13:41 2013 KojiOpticsGeneralFailure of PZT-glass joints[Koji, Jeff, Zach, Lisa]
We glued a test PZT-mirror assembly
last week in order to make sure the heat
  
  184   Wed May 14 02:15:15 2014 KojiOpticsCharacterizationFSR/TSM adjustment of the OMC cavity 1. FSR was adjusted and measured with "the
golden arches" technique again.
FSR = 264.8412 MHz +/- 1400Hz =>
 Cav_scan_response_140503_Pitch.pdfCav_scan_response_140503_Yaw.pdf 
  196   Sun Jul 6 02:45:56 2014 KojiOpticsGeneralFSR Measurement3rd OMC FSR / Finesse measurement
RF AM was injected by detuning a
HWP.
 finesse_measurements_log.pdf 
  311   Thu Jan 10 20:42:54 2019 KojiOpticsCharacterizationFSR / HOM Test of OMC SN002OMC SN002 = Former LHO OMC
which CM1 was destroyed by the lock loss
pulse in 2016. This OMC needs to be optically
  
  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 
  201   Tue Jul 8 04:08:06 2014 KojiGeneralGeneralExpoxy reapplication for beam dumpsFirstly, the excess epoxy was removed using
a cleaned razor balde
  
  384   Tue Oct 22 11:56:09 2019 StephenSupplyGeneralEpoxy Status update as of 22 October 2019The following is the current status of
the epoxies used in assembly of the OMC (excerpt
from C1900052)
 image_ep30-2_epoxy_kit_pcs_item_1582_location_downs_3303.JPG 
  383   Tue Oct 22 11:52:53 2019 StephenGeneralGeneralEpoxy Curing Timeline of OMC PZT Assy #9 and #10This post captures the curing timeline
followed by OMC PZT Assys #9 and #10.

Source file posted in case any
 omc_elog_383_Epoxy_Curing_Timeline_of_OMC_PZT_Assy_20191022.pngomc_elog_383_Epoxy_Curing_Timeline_of_OMC_PZT_Assy.pptx 
  93   Wed Apr 3 18:42:45 2013 KojiOpticsGeneralEP30-2 gluing testEP30-2 gluing test
  
  442   Wed Aug 24 02:57:43 2022 KojiGeneralGeneralEP30-2 bonding setupEP30-2 bonding setup  IMG_1178.JPGIMG_1179.JPGIMG_1180.JPG 
  375   Wed Sep 18 22:30:11 2019 StephenSupplyGeneralEP30-2 Location and StatusHere is a summary of the events of the
last week, as they relate to EP30-2.

1) I lost the EP30-2 syringes that
 IMG_5217.JPG 
  296   Wed May 30 16:40:38 2018 KojiMechanicsCharacterizationEOM mount stability testhttps://awiki.ligo-wa.caltech.edu/wiki/EOM_Mount_Stability   
  302   Wed Jul 4 18:30:51 2018 KojiElectronicsCharacterizationEOM circuit modelsThe circuit models for the 3IFO EOM (before
mods) were made using LISO.
Then the modification plan was made
 eom_models.pdfeom9.pdfeom24.pdfeom45.pdf180704_3IFO_EOM_model.zip 
  295   Tue May 15 19:53:45 2018 KojiOpticsGeneralEOM Q comparisonQs' were estimated with a lorentzian
function (eye fit)

  
  245   Tue Dec 15 13:38:34 2015 KojiElectronicsCharacterizationEOM Driver linearity checkLinearity of the EOM driver was
tested. This test has been done on Nov 10,
2015.
 Output_linearity.pdfCtrl_Bias.pdf 
  23   Mon Oct 8 11:30:47 2012 KojiOpticsGeneralEG&G 2mm photodiode angle responseEGE&G 2mm photodiode angle response
measured by Sam T1100564-v1
  
  224   Wed Jul 15 22:23:17 2015 KojiElectronicsAM Stabilized EOM DriverE1400445 first lookThis is not an OMC related and even not
happening in the OMC lab (happening at the
40m), but I needed somewhere to elog...
 IMG_20150714_195534852.jpgIMG_20150714_195227746_HDR.jpg 
  282   Fri Jun 23 10:55:07 2017 KojiOpticsGeneralDust layer on black glass beam dumps?I wondered why the black glass beam dumps
looked not as shiny as before. It was in
fact a layer of dusts (or contaminants) accumulated
 black_glass_dust.JPG 
  147   Fri Jun 28 12:20:49 2013 KojiGeneralGeneralDmass's loan of Thorlabs HV amphttp://nodus.ligo.caltech.edu:8080/Cryo_Lab/799
(KA: Returned upon H1OMC building)
  
  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 
  380   Thu Sep 26 17:33:52 2019 StephenGeneralGeneralDirty ABO test run prior to PZT Subassembly Bonding - ABO is Ready!Follow up on OMC
elog 379

I was able to obtain the following
 image_showing_20190924_abo_qualifying_bake.png 
  377   Wed Sep 18 23:38:52 2019 StephenGeneralGeneralDirty ABO ready for PZT Subassembly BondingThe 40m Bake Lab's
Dirty ABO's OMEGA PID controller was
borrowed for another oven in the Bake Lab,
 index.png 
  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 
  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 
  247   Tue Dec 15 13:42:37 2015 KojiOpticsCharacterizationDimensions / packaging of HQE PDsThe dimensions of a high QE PDs was measured
as well as the ones for C30665. (Attachment
4, Unit in mm)
 PC147842.jpgPC147846.jpgPC147848.jpgHQEPD_dimension.pdf 
  251   Sat Feb 20 19:11:22 2016 KojiElectronicsCharacterizationDark current measurement of the HQE PD and other PDsDark current of the HQE PD and
other PDs were measured.

- The HQE PDs were loaded on the
 P2197992.jpgPD_dark_current.pdfPD_dark_current_others.pdf 
  253   Sun Mar 13 21:22:27 2016 KojiElectronicsCharacterizationDark current measurement of the HQE PD and other PDsTransfered for RGA scan

B4 (C1-05) -> F1
C1 (C1-07) -> F2
  
  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 
  130   Thu May 23 23:41:48 2013 KojiMechanicsGeneralDCPD/QPD MountDCPD mounts and QPD mounts were attached
on the breadboard. They are not aligned yet
and loosely fastened.
  
  118   Thu Apr 18 11:59:02 2013 KojiGeneralGeneralDCPD path gluing[Jeff, Koji]
DCPD path gluing
  
  363   Mon May 20 19:53:17 2019 KojiOpticsConfigurationDCPD high power testWe want to perform a damage test of OMC
DCPDs with high power beam. The OMC DCPD
is the 3mm InGaAs photodiodes with high quantum
 BIAS.pdfP_20190520_204822.jpg 
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