40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  OMC elog, Page 6 of 9  Not logged in ELOG logo
ID Date Author Type Category Subjectup Text Attachments
  273   Thu Dec 8 21:17:09 2016 KojiGeneralGeneralOMC placed on the table / the beam roughly alignedThe OMC cavity was locked. The alignment
was precisely adjusted. The mode matching
was optimized by the lens positions. The
  
  197   Sun Jul 6 02:46:20 2014 KojiOpticsCharacterizationOMC power budget3rd OMC power budget (2014/7/2)
Input power: 34.8mW
  
  354   Wed Apr 24 13:58:51 2019 JoeOpticsCharacterizationOMC power budget and UV Epoxy Bonding of BS1[koji,philip,joe,liyuan,stephen]

need to add spot positions.

Mirrors: PZT11,PZT22, A14, A5
  
  181   Tue Mar 25 17:10:10 2014 KojiOpticsCharacterizationOMC spot position estimationSpot positions were inferred from the photos  OMC_spot.pdf 
  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 
  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 
  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 
  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 
  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 
  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 
  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 
  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 
  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.
  
  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 
  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 
  336   Mon Apr 15 21:11:49 2019 PhilipOpticsCharacterizationOMC(004): PZT testing for spare OMC[Koji, Philip]

Today we tested the functionality
of the four remaining PZTs (11,12,13 and
  
  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 
  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.
  
  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 
  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 
  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 
  352   Mon Apr 22 19:54:28 2019 KojiGeneral OMC(004): Spot positions at the end of Apr 22nd   misalignment4.pdf 
  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 
  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:


  
  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 
  152   Fri Aug 16 16:36:19 2013 KojiOpticsGeneralOptics ListLink
to the "Mirror/PZT Characterization
links"
  
  420   Thu Jul 21 14:55:48 2022 KojiGeneralGeneralOptics bonding for the backscatter measurementThe backscatter beam is supposed to appear
in the backpropagation path. The transmission
of the OMC has a couple of optics, it's
 IMG_1098.JPG 
  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
  
  172   Wed Oct 16 19:16:29 2013 KojiOpticsCharacterizationPD alignment 
 shim 1.5mm 001/002
  
  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 
  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.
  
  111   Tue Apr 16 00:40:45 2013 KojiOpticsGeneralPD/QPD path gluing ~ preparation[Jeff Koji]
- Placed the optics on the PD/QPD
path
  
  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.
  
  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 
  103   Mon Apr 8 20:56:52 2013 KojiOpticsConfigurationPZT & Curverd Mirror arrangementAssembly #1:
Mounting Prism #16
PZT #26
 PZT_assembly.pdf 
  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 
  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
  
  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 
  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 
ELOG V3.1.3-