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IDup Date Author Type Category Subject Text Attachments
  152   Fri Aug 16 16:36:19 2013 KojiOpticsGeneralOptics ListLink
to the "Mirror/PZT Characterization
links"
  
  153   Fri Aug 16 17:21:38 2013 KojiGeneralGeneral[OMC002] Build started[Jeff Koji]

The breadboard (SN2) was loaded
on the transportation fixture.
  
  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
  
  155   Thu Aug 22 15:34:03 2013 KojiOpticsGeneralOMC Cavity side gluing[Koji Jeff]
o BS1, FM1, FM2 prisms were glued
=> This fixed the unstability of
  
  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 
  158   Tue Aug 27 17:02:31 2013 KojiMechanicsCharacterizationSpot position measurement on the diode mountsAfter the PZT test, the curved mirrors
were aligned to the cavity again.
In order to check the height of the
 DCPD1.png 
  159   Thu Aug 29 02:52:50 2013 KojiOpticsCharacterizationH1OMC Curved Mirror AlignmentCavity
parameter was measured with 50V bias on PZT1
(CM1)
 Cav_scan_response_130828_Pitch.pdfCav_scan_response_130828_Yaw.pdf 
  160   Thu Aug 29 18:55:36 2013 KojiMechanicsGeneralI1 OMC top side gluing (UV)The glass components for the I1 OMC top
side were glued by the UV glue.
Breadboard SN#4
  
  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 
  162   Fri Aug 30 12:22:56 2013 KojiOpticsGeneralH1 OMC Cavity side UV gluingH1 OMC Cavity side optics was glued
on the breadboard
  
  163   Fri Aug 30 12:24:28 2013 KojiOpticsCharacterizationH1OMC Spot positionsBeam heights on the diodes

DCPD1: 14.459mm -> With 1.5mm
 DCPD1.pngDCPD2.pngQPD1.pngQPD2.png 
  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 
  165   Tue Sep 3 17:03:25 2013 KojiGeneralGeneralH1 OMC gluing completed[Koji Jeff]
H1 OMC
  
  166   Wed Sep 4 22:22:54 2013 KojiGeneralGeneralH1 OMC wrapped and moved to the bake lab.[Koji, Jeff]
We moved the H1OMC to the bake lab.
Chub set up the vacuum bake oven
  
  167   Sat Sep 7 17:20:56 2013 KojiGeneralGeneralOMC/PD lab optical table wrapping[Koji Jeff]
In order to prepare for the splinkler
installation on the HEPA enclosure, the table
 P9064377.JPG 
  168   Fri Sep 13 15:09:20 2013 KojiGeneralGeneralSprinkler installation: doneA sprinkler head was installed on the HEPA
enclosure. The head is covered with a plastic
cap.
 P9134379.jpgP9134378.jpg 
  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.
  
  170   Mon Oct 14 15:50:55 2013 KojiOpticsCharacterizationH1 OMC Power budgetLHO OMC power budget

    
 OMC_power_budget.pdf 
  171   Tue Oct 15 18:50:08 2013 KojiOpticsCharacterizationQPD alignment1) Deburr the bottom surfaces of the QPD
housings
2) Aligned the QPDs
  
  172   Wed Oct 16 19:16:29 2013 KojiOpticsCharacterizationPD alignment 
 shim 1.5mm 001/002
  
  173   Tue Oct 22 17:17:59 2013 KojiGeneralGeneralH1OMC cabling[Chub, Jeff, Koji]
We worked on the wiring and routing
of the cables.
  
  174   Wed Oct 23 02:45:07 2013 KojiGeneralGeneralPD realignmentDCPD2 got misaligned during the cable installation.
The PD alignment procedure have been gone
through again.
  
  175   Mon Nov 4 19:43:56 2013 KojiGeneralGeneralH1OMC PackedH1OMC PZT connector was replaced with the
correct one. This was the final step for
H1OMC.
  
  176   Thu Nov 21 00:05:35 2013 KojiGeneralGeneralH1OMC electronics arrangementChecked the PZT arrangement: Mighty Mouse
Pin1&2 -> PZT2 (DCPD side), Mighty
Mouse Pin3&4 -> PZT1 (QPD side)
 H1OMC_cable_arrangement.pdf 
  177   Tue Dec 10 16:41:51 2013 KojiGeneralGeneralTo BuyMasks / Wipes => done   
  178   Tue Feb 18 18:58:38 2014 KojiGeneralGeneralLHO H1 OMC installation photosLHO OMC installation photos
  
  179   Fri Feb 28 19:50:11 2014 KojiGeneralGeneralMisalignment ABCD matrix for the aLIGO OMCRelationship between mirror misalignment
and cavity mode shift was calculated.
The technique described in T0900647
 misalignment.pdf 
  180   Mon Mar 3 02:46:21 2014 KojiGeneralCharacterizationSpot positions scannedSpot positions on CM1 and CM2 scanned according
to the recipes provided by the previous entry.
The best result obtained was:
  
  181   Tue Mar 25 17:10:10 2014 KojiOpticsCharacterizationOMC spot position estimationSpot positions were inferred from the photos  OMC_spot.pdf 
  182   Thu Apr 17 21:39:25 2014 KojiOpticsGeneralMore alignmentSTORY:
- The cavity mirrors have scattering
spots. The cavity alignment should have been
  
  183   Mon May 12 22:43:02 2014 KojiOpticsCharacterizationMeasured FSR/TSM of the OMC cavityData analysis of the FSR/TSM measruement
last week.
1. FSR was measured with "the
 Cav_scan_response_Pitch.pdfCav_scan_response_Yaw.pdf 
  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 
  185   Fri May 16 00:13:36 2014 KojiOpticsCharacterizationCavity mirror gluing part 1BS1/FM1/FM2 for I1OMC were glued.
FM1 had to be intentionally rotated.
FM1 had to be intentionally shifted
  
  186   Sat May 17 07:40:14 2014 KojiOpticsCharacterizationI1OMC cavity mirrors gluedI1OMC cavity mirrors were glued.
FSR = 264.82MHz => Lcav = 1.132m
(nominal 1.132m)
 Cav_scan_response_140516_Pitch.pdfCav_scan_response_140516_Yaw.pdf 
  187   Thu Jun 19 23:16:50 2014 KojiOpticsGeneralAll of the prisms have been glued- All of the PRISM mirrors have been glued
- 4 out of 5 beam dumps have been
glued
 P6196525.JPG 
  188   Fri Jun 20 18:59:12 2014 KojiOpticsGeneralAll of the invar blocks have been gluedAll of the INVAR blocks have been glued.
I found thinner shims in the stock.
On Monday, the template will be removed.
  
  189   Mon Jun 23 21:54:16 2014 KojiOpticsGeneralAll of the gluing completedThe bottom-side templates were removed.
The last beam dump was removed
TODO
  
  190   Tue Jun 24 18:43:15 2014 KojiGeneralGeneralICS entries for the OMC baking/assemblyFor baking:

    Assembly Name aLIGO Output
Mode Cleaner
  
  191   Fri Jun 27 12:29:50 2014 KojiGeneralGeneralOMC bakingThe OMC went into the oven at around 2PM
on Thursday. It will be baked at 80degC for
48 hours.
 P6266536.jpg 
  192   Fri Jun 27 18:51:33 2014 KojiGeneralGeneralSupplyPTOUCH TAPE (12mm white) x 2
9V batteries
  
  193   Wed Jul 2 16:41:43 2014 KojiGeneralGeneralOMC bakingOMC is back from the oven today.
To Do:
Optical tests
  
  194   Wed Jul 2 18:58:42 2014 KojiGeneralGeneralBeam dump delaminationWhile the OMC breadboard was being inspected,
it was found that two out of five black-glass
beam dumps showed sign of delamination.
 beamdump_delamination.png 
  195   Thu Jul 3 17:45:18 2014 KojiGeneralGeneralBeam dump delaminationHere is the resolution.
I'll apply fillets of EP30-2 along
the edges of the black glass (See figure).
 beamdump_delamination_solution.png 
  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 
  197   Sun Jul 6 02:46:20 2014 KojiOpticsCharacterizationOMC power budget3rd OMC power budget (2014/7/2)
Input power: 34.8mW
  
  198   Sun Jul 6 03:56:40 2014 KojiOpticsCharacterizationHOM measurement with PZT vol sweptCavity FSR/TMS measurement (2014/7/5) with
PZT voltages swept from 0V to 200V (50V step)
 Cav_scan_response_PZT1.pdfCav_scan_response_PZT2.pdfOMC_HOM_140705.pdf 
  199   Sun Jul 6 08:31:14 2014 KojiOpticsCharacterizationHOM measurement with PZT vol swept3rd OMC, HOM diagram at PZT1=0V and PZT2=50V.
First coincidence with the carrier
is the 32nd-order carrier mode. Very good.
 HOM_plot.pdf 
  200   Mon Jul 7 01:36:03 2014 KojiGeneralGeneralTo DoOptical tests

    Cleaning

   Power Budget
  
  201   Tue Jul 8 04:08:06 2014 KojiGeneralGeneralExpoxy reapplication for beam dumpsFirstly, the excess epoxy was removed using
a cleaned razor balde
  
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