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New entries since:Wed Dec 31 16:00:00 1969
ID Date Authorup Type Category Subject Text Attachments
  316   Sat Feb 2 20:03:19 2019 KojiOpticsCharacterizationSummary: OMC(002) HOM structure recalculation (before mirror replacement)OMC (002)
History: Measurement date
2013/10/11, Installed to L1 2013/XX
 OMC_HOM_131011.pdfHOM_PZTV.pdfHOM_plot_PZT0_0.pdfCav_scan_response_PZT_HOM.pdf 
  317   Sat Feb 2 20:28:21 2019 KojiOpticsCharacterizationSummary: OMC(003) HOM structure recalculationOMC (003)
History: Measurement date
2014/7/5, Stored for I1, Installed to H1
 OMC_HOM_140705.pdfHOM_PZTV_PZT1_0V.pdfHOM_plot_PZT0_0.pdfCav_scan_response_PZT_HOM.pdf 
  318   Sat Feb 2 20:35:02 2019 KojiOpticsCharacterization Summary: OMC(002) HOM structure recalculation (after mirror replacement) OMC (002) after repair
History:Mirror replacement
after the damage at H1. Measurement date
 OMC_HOM_190110.pdfHOM_PZTV.pdfHOM_plot_PZT0_0.pdfCav_scan_response_PZT.pdf 
  319   Tue Mar 19 17:30:25 2019 KojiGeneralCharacterizationOMC (002) Test itemsOMC #002 Optical tests


FSR
measurement (done, 2019/1/8-9, 2019/4/1)
  
  320   Thu Mar 28 16:36:52 2019 KojiMechanicsCharacterizationOMC(002) PZT characterization As
performed in the ELOG 202, the PZTs of
the OMC 002 were tested.
 PZT_Scan.pdfOMC_PZT_Response.pdf 
  321   Thu Apr 4 20:07:39 2019 KojiSupplyGeneralPurchase== Office Depot ==
Really
Useful Box 9L x 6 (delivered)
  
  322   Fri Apr 5 01:07:18 2019 KojiOpticsCharacterizationOMC(002): transmitted beam imagesThere was a concern that the transmission
from CM1 has additional fringes. The shape
of the transmitted beams from CM1, CM2, and
 CM1trasns.pngCM2trasns.pngFM2trans2.png 
  323   Fri Apr 5 01:08:17 2019 KojiOpticsCharacterizationOMC(002): DCPD / QPD alignmentThe beam height in the cavity became totally
different from the previous one and the shims
needed to be much thicker than before. This
 IMG_7521.JPGIMG_7529.JPGIMG_7539.JPGIMG_7541.JPG 
  324   Fri Apr 5 20:50:54 2019 KojiOpticsCharacterizationOMC(002): QPD alignmentQPD#             
QPD1      
QPD2
 P_20190405_215906.jpgP_20190405_215927.jpg 
  325   Fri Apr 5 23:30:20 2019 KojiGeneralGeneralOMC (002) repair completedOMC(002)
repair completed

When the cable harness of OMC(004)
 P_20190405_222401.jpgP_20190405_222509.jpgP_20190405_222529.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)
  
  328   Thu Apr 11 12:15:31 2019 KojiMechanicsConfigurationPZT sub assy mirror orientations   PZT_subassy.pngPZT_subassy.pdf 
  329   Thu Apr 11 21:22:26 2019 KojiMechanicsGeneralOMC(004): PZT sub-assembly gluing[Koji Stephen]

The four PZT sub-assemblies were
glued in the gluing fixtures. There were
 IMG_7561.jpgIMG_7567.jpg 
  330   Thu Apr 11 21:22:58 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly air baking[Stephen Koji]

The baking of the PZT subassemblies
was more complicated than we initially thought.
 temp_profile.pdfbake.xlsx 
  331   Sun Apr 14 23:58:49 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection[Koji Stephen]

(Friday afternoon) We retrieved
the PZT sub-assemblies to the clean room.
  
  332   Mon Apr 15 00:08:32 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #7)Sub-ASSY
#7

Probably the best glued unit among
 6x 
  333   Mon Apr 15 00:39:04 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #8)Sub-ASSY
#8

Probably the best glued unit among
 8x 
  334   Mon Apr 15 01:07:30 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #9)Sub-ASSY
#9

The most fractured unit among four.
 7x 
  335   Mon Apr 15 01:23:45 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #10) Sub-ASSY
#10

Attachment #1: Mounting
 IMG_7589.jpgIMG_7590.jpgIMG_7591.jpgIMG_7592.jpg 
  337   Tue Apr 16 11:36:36 2019 KojiOpticsCharacterizationOMC(004): PZT testing for spare OMCAttachment 1: Shadow sensor
setup for the PZT displacement test

Attachment 2:
 9x 
  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 
  342   Tue Apr 16 21:16:11 2019 KojiOpticsCharacterizationOMC(004): PZT testing for spare OMCAfter having dug into the past email, it
turned out that these wires were the ones
already replaced from the original teflonwires.
  
  343   Tue Apr 16 23:11:43 2019 KojiGeneralGeneralBorrowed items from the other labsApr 16, 2019
Borrowed
two laser goggles from the 40m. (Returned
  
  349   Fri Apr 19 11:34:19 2019 KojiOptics OMC initial alignment and lockingThe spot on CM1 was found displaced by
3.4mm (horiz.) and 3.0mm (vert.)
in the upper right direction looking from
 misalignment1.pdf 
  350   Sat Apr 20 00:50:12 2019 KojiOpticsCharacterizationOMC(004): Spot positionsSimilarly to OMC
ELOG 349 the spot positions after the
replacement of CM2 were measured (Attachment
 misalignment2.pdfmisalignment3.pdf 
  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 
  357   Fri May 3 11:06:28 2019 KojiOpticsCharacterizationOMC(004): Spot positions and the scatteringExperiment on 5/1
- CM1 right knob was moved 1div (10um)
backward such that the spots were better
 misalignment.pdf 
  359   Thu May 9 17:35:07 2019 KojiOpticsGeneralAlignment strategyNotes
on the OMC cavity alignment strategy

- x3=1.17 γ + 1.40 δ, x4=1.40
 T1500060_OMC_Optical_Testing_Procedure.pdf 
  360   Thu May 9 18:10:24 2019 KojiOpticsCharacterizationOMC(004): Spot position scan / power budget(Now the CCD image is captured as a movie
and the screen capture is easier!)

Various spot positions
 190508.pngscattering_spots_CM1.png 
  361   Wed May 15 19:07:53 2019 KojiCleanGeneralWhat is this???Suddenly something dirty emerged in the
lab. What is this? It looks like an insulation
foam or similar, but is quite degraded and
 P_20190515_185602.jpgP_20190515_185844.jpg 
  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 
  364   Wed May 22 07:31:37 2019 KojiOpticsConfigurationCamera test (DCPD high power test)C30665 (3mm) camera test. The camera was
Canon PowerShot G7X MkII. Exposure 1/15s,
F 5.6, ISO 125, MF (~the closest), no zoom.
 20190521201838_IMG_7939_2.jpg 
  365   Thu May 23 01:42:46 2019 KojiOpticsCharacterizationC30665 high power testAn Excelitas C30665 PD with the
cap removed (SN07 in Case H slot #2) was
exposed to the beam with the optical power
 C30665_high_power_test.pdfpd_surface.jpg 
  366   Thu May 23 23:27:38 2019 KojiOpticsCharacterizationIGHQEX3000 high power testLaserComponents IGHQEX3000 (Cage
B2: Serial# B1-23) was exposed to the beam
with the optical power from 1.6mW to 332mW.
 HQEPD_high_power_test.pdfpd_images.png 
  368   Mon Jun 24 12:54:58 2019 KojiCleanGeneralHEPA BOOTHhttps://www.airscience.com/purair-flow-laminar-flow-cabinets   
  369   Mon Jul 1 12:38:49 2019 KojiOpticsCharacterizationA and M prisms perpendicularity measurement[Stephen, Koji]

The perpendicularity of
some of the A and M prisms were tested.
 6x 
  370   Mon Jul 1 12:49:42 2019 KojiOpticsCharacterizationScattering measurement of A and C mirrorsLiyuan's scattering measurement for
the A and C mirrors.
 omc_cm_tis_062419.pdfomc_prism_tis_062419.pdf 
  378   Mon Sep 23 21:29:51 2019 KojiOpticsGeneralOMC(004): PZT sub-assembly gluing (#9/#10)[Stephen, Shruti, Koji]

We worked on the gluing of the
PZT sub-assy (#9 and #10) along with the
 IMG_8933.jpgIMG_8934.jpg 
  381   Mon Sep 30 23:16:53 2019 KojiOpticsGeneralOMC(004): PZT sub-assembly gluing (#9/#10)Friday: [Stephen, Koji]

As the oven setting has qualified,
we brought the PZT assys in the air bake
 IMG_8950.jpegIMG_8953.jpegIMG_8954.jpegIMG_8955.jpeg 
  385   Tue Oct 22 15:54:59 2019 KojiElectronicsLoan / LendingBorrowed LB1005 from Cryo CavFrom Cryo Cav setup

Borrowed LB1005 Servo box ->
OMC
  
  386   Fri Dec 6 00:55:25 2019 KojiOpticsGeneralBeamdump gluing[Stephen, Koji]

20 glass beamdumps were
bonded at the 40m cleanroom.
 6x 
  388   Wed Dec 18 21:54:53 2019 KojiGeneralGeneralOMC Beam Dump Production Cure BakeThe beamdumps were taken out from the oven
and packed in bags.

The bottom of the V are completely
 P_20191218_160650_vHDR_On.jpegP_20191218_160705_vHDR_On.jpegP_20191218_160733_003.jpeg 
  389   Thu Feb 27 14:31:13 2020 KojiGeneralGeneralItem lendingItem lending as per Ian's request:
Particle Counter from OMC Lab to QIL

 
 P_20200227_134755_vHDR_On.jpg 
  390   Mon Aug 10 15:29:54 2020 KojiGeneralGeneralItem lendingThe particle counter came back to the OMC
lab on Aug 10, 2020

 
  
  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.
  
  392   Mon Aug 10 15:53:46 2020 KojiGeneralGeneralLab status checkCheck-in to the OMC lab to see the status.
Nothing seemed changed. No bug. The HEPA
is running normal. The particle level was
  
ELOG V3.1.3-