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ID Date Author Type Category Subjectdown Text Attachments
  288   Fri Sep 8 15:14:05 2017 KojiFacilityGeneralPreparation for the plumbing work[Steve, Aaron, Koji]

We've finished the preparation
for the forthcoming plumbing work on (nominally)
 7x 
  290   Thu Nov 30 12:18:41 2017 StephenGeneralGeneralPreparation for Modal Testing on 4 DecemberNorna Robertson, Stephen Appert || 
29 Nov 2017, 2 pm to 4 pm  || 
227 Downs, CIT
  
  399   Fri Nov 6 18:38:00 2020 KojiGeneralGeneralPowermeter lent from OMC Lab to 2um ECDLThorlabs' powermeter controler + S401C
head was lent from OMC Lab.

https://nodus.ligo.caltech.edu:8081/SUS_Lab/1856
  
  227   Wed Jul 22 09:43:01 2015 KojiElectronicsAM Stabilized EOM DriverPower supply test of the EOM/AOM DriverSerial Number of the unit: S1500117
Tester: Koji Arai
  
  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 
  136   Mon Jun 3 21:19:03 2013 KojiGeneralGeneralPlanningMonday - Evening
(Koji)
[done] - DCPD alignment
  
  29   Tue Oct 16 15:51:01 2012 KojiGeneralGeneralPlan Update: October [!]Completed work of the previous months:
[Jul]
[Aug]
  
  34   Wed Nov 7 20:44:11 2012 KojiGeneralGeneralPlan Update: November [!]Completed work of the previous months:
[Jul]
[Aug]
 OMC_Project_Schedule.pdf 
  7   Sat Jul 14 02:16:07 2012 KojiGeneralGeneralPlan Update: JulyFacility/Supplies

    Work in progress
 P7071878.jpg 
  13   Tue Jul 31 21:33:17 2012 KojiGeneralGeneralPlan Update: August [!]Completed work of the previous months:
[Jul]
[Aug] [Sep] [Oct] [Nov] [Dec]
  
  246   Tue Dec 15 13:39:13 2015 KojiElectronicsCharacterizationPhase noise measurement of aLIGO EOM driversThis measurement has been done on Dec 1st,
2015.


The phase noise added by
 phase_noise.pdfphase_noise_9MHz.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 
  398   Fri Oct 23 19:09:54 2020 KojiGeneralGeneralParticle counter transfered to RadhikaSee this entry: https://nodus.ligo.caltech.edu:8081/40m/15642   
  17   Mon Aug 13 17:01:35 2012 KojiCleanGeneralParticle CountsAug 13, 2012 / 0.5um 1000~2000/(0.1 cu
ft) / 0.7um   400-600/(0.1 cu ft)
by ATF particle counter (MET ONE 227A)
  
  20   Tue Sep 25 14:18:14 2012 KojiCleanGeneralParticle CountsParticle counts
Before the prefilter is installed:
0.5um 1191cnts, 0.7um 346cnts
  
  21   Mon Oct 1 16:06:55 2012 KojiCleanGeneralParticle Counts1. It turned out that the particle
counter MET ONE 227A at ATF shows 
(particle count)/(0.1 ft^3) 
  
  5   Thu Jun 21 03:07:27 2012 ZachOpticsConfigurationParameter selection / mode definitionEDIT 2 (ZK): As with the   geom_bowtie.pnggeom_non-bowtie.png 
  203   Thu Jul 10 01:39:38 2014 KojiElectronicsGeneralPZT wireRich came to the OMC lab. Pins for the
mighty mouse connector were crimped on the
4 PZT wires.
 P7096669.JPG 
  312   Thu Jan 10 20:45:00 2019 KojiOpticsCharacterizationPZT test cableAs OMC SN002 already has the PZTs connected
to the Mighty-Mouse connector, a test cable
with a female mighty-mouse connector was
 OMC_PZT_wiring.pdf 
  328   Thu Apr 11 12:15:31 2019 KojiMechanicsConfigurationPZT sub assy mirror orientations   PZT_subassy.pngPZT_subassy.pdf 
  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 
  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 
  314   Fri Feb 1 12:52:12 2019 KojiMechanicsGeneralPZT deformation simulationA simple COMSOL simulation was run to see
how the PZT deforms as the voltage applied.

Use the geometry of the ring PZT
 pzt.png 
  202   Tue Jul 8 18:54:54 2014 KojiMechanicsCharacterizationPZT characterizationEach PZT was swept with 0-150V 11Hz triangular
wave.
Time series data for 0.2sec was recorded
 PZT_Scan.pdfI1OMC_PZT_Response.pdf 
  77   Sat Mar 23 13:34:14 2013 KojiOpticsGeneralPZT assembly prototype glued 
Prototype
PZT assembly
 P3223322.jpgP3223323.jpgP3233336.jpgP3233348.jpg 
  106   Tue Apr 9 13:56:09 2013 KojiOpticsGeneralPZT assembly post gluing / pre baking pictures 
  
  104   Mon Apr 8 21:11:14 2013 KojiOpticsGeneralPZT assembly gluing[Jeff, Zach, Koji] 
PZT assembly gluing
Glue gun -> to be returned to
  
  102   Mon Apr 8 11:49:18 2013 KojiMechanicsCharacterizationPZT actuator tested at LLOTest result of the PZTs by Valera and Ryan
PZT  Length Angle
 #
  [nm/V] [urad/um]
 11  14.5   17.6
  
  374   Thu Sep 5 15:40:42 2019 shrutiOpticsConfigurationPZT Sub-AssemblyAim: To find the combinations
of mounting prism+PZT+curved mirror to build
two PZT sub-assemblies that best minimises
 Diagrams_SubAssembly.pdfC10_C13_Combinations.pdfPlots_Config_Tolerance.pdf 
  148   Sat Jul 6 17:10:07 2013 KojiMechanicsCharacterizationPZT Response analysisAnalysis of the PZT scan / TF data taken
on May 31st and Jun 1st.
[DC scan]
 PZT_Scan.pdfL1OMC_PZT_Response.pdf 
  150   Mon Aug 12 20:22:19 2013 KojiGeneralGeneralPZT Assembly #5/#6PZT Assembly #5/#6 were glued on Fri Aug
9th
They are removed from the fixture
  
  149   Fri Aug 9 10:09:56 2013 KojiGeneralGeneralPZT Assembly #3/#4Yesterday, Jeff and I bonded the PZT assemblies
(#3/#4).
The attached is the arrangement of
 PZT_assembly.pdf 
  103   Mon Apr 8 20:56:52 2013 KojiOpticsConfigurationPZT & Curverd Mirror arrangementAssembly #1:
Mounting Prism #16
PZT #26
 PZT_assembly.pdf 
  313   Sat Jan 12 22:49:11 2019 KojiOpticsCharacterizationPM-SM patch cable mode cleaning effectMode
cleaning capability of an optical fiber was
measured. The conclusion
 fiber_mode_cleaning.pdf 
  276   Tue Mar 28 21:04:27 2017 KojiElectronicsCharacterizationPDH ampAttachment 1: PDH amp
RF part (before the preamp was installed)

Attachment 2:
 6x 
  286   Sat Jul 29 18:44:38 2017 ranaElectronicsCharacterizationPDH ampattachment 6: DCPD preamp looks like the
opamp is wired for positive feedback?
  
  287   Sat Jul 29 21:42:51 2017 KojiElectronicsCharacterizationPDH ampThe polarities indicated in the right circuits
were opposite, obviously.
  
  111   Tue Apr 16 00:40:45 2013 KojiOpticsGeneralPD/QPD path gluing ~ preparation[Jeff Koji]
- Placed the optics on the PD/QPD
path
  
  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.
  
  252   Sun Mar 6 02:13:28 2016 KojiOpticsCharacterizationPD glass reflectionsOn friday, I removed a glass cover of a
G30655 with a PD can cutter.

When a beam shoots a Perkin Elmer/Excelitas
 P3048124.JPGP3048125.JPG 
  172   Wed Oct 16 19:16:29 2013 KojiOpticsCharacterizationPD alignment 
 shim 1.5mm 001/002
  
  241   Tue Sep 8 11:18:10 2015 KojiOpticsCharacterizationPBS Transmission measurementMotivation: Characterize
the loss of the Calcite Brewster PBS.

Setup: (Attachment
 setup.JPGCaF2Prism.jpgCaF2Prism2.JPG 
  242   Wed Sep 9 01:58:34 2015 KojiOpticsCharacterizationPBS Transmission measurementCalcite Brewster PBS Continued

The
transmission loss of the Calcite brewster
  
  152   Fri Aug 16 16:36:19 2013 KojiOpticsGeneralOptics ListLink
to the "Mirror/PZT Characterization
links"
  
  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 
  326   Wed Apr 10 19:22:24 2019 KojiGeneralGeneralOMC(004): preparation for the PZT subassembly bonding Preparation for the PZT subassembly
bonding (Section 6.2 and 7.3 of T1500060
(aLIGO OMC optical testing procedure)
  
  327   Thu Apr 11 10:54:38 2019 StephenGeneralGeneralOMC(004): preparation for the PZT subassembly bonding


Quote:


  
  344   Wed Apr 17 09:08:47 2019 StephenGeneralGeneralOMC(004): Unwrapping and preparing breadboard[Stephen, Philip, Koji, Joe]

Breadboard D1200105 SN06 was selected
as described in eLOG
 IMG_7635_packaging_of_sn06.JPGIMG_7637_engraving_of_sn06.JPGIMG_7641_particulate_before_top_gun_large_face.JPGIMG_7644_particulate_before_top_gun_small_face.JPGIMG_7646_particulate_after_top_gun.JPG 
  352   Mon Apr 22 19:54:28 2019 KojiGeneral OMC(004): Spot positions at the end of Apr 22nd   misalignment4.pdf 
  356   Wed May 1 15:40:46 2019 KojiOpticsCharacterizationOMC(004): Spot positions and the scatteringTried a few things.

1. Replaced CM1 (PZT ASSY
#10=M21+PZT#22+C12) with PZT ASSY #7 (=M1+PZT#13+C13)
 misalignment.pdf 
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