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New entries since:Wed Dec 31 16:00:00 1969
IDup Date Author Type Category Subject Text Attachments
  452   Mon Nov 7 22:00:33 2022 KojiOpticsConfigurationSetting up the fiber couplersFiber matching: 43.2/56.7 = 76%
S/P-pol ratio 0.7/43.2 = 1.6%

 
  
  453   Fri Nov 11 19:07:48 2022 KojiSupplyGeneralSupply OrderClean Supply Ordered


TexWipe TX8410 AlphaSat
Vectra Alpha 10 50 sheets x 12 pk  (VWR
  
  454   Mon Nov 14 08:34:45 2022 CamilleOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)[Camille, Koji]

Friday, Nov 11th, 2022

Setting up OMC #1 for transmission
 PXL_20221111_200942943.jpgPXL_20221111_200957951.jpg 
  455   Mon Nov 14 09:27:13 2022 KojiOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)The measured total optical loss of the
OMC was

1st:   0.015 +/- 0.003
 OMC_Powerbudget.xlsx 
  456   Tue Nov 15 07:46:58 2022 Camille MakaremOpticsGeneralcleaning OMC #1Monday, November 14, 2022

Camille and Koji did a "deep
cleaning" of OMC#1:
  
  457   Tue Nov 15 10:58:53 2022 KojiOpticsGeneralOMC #1 damaged black glass removal[Camille, Koji]

The damaged black glass was removed
from the OMC breadboard leaving the glass
 PXL_20221114_222641455.jpgPXL_20221114_222544330.jpgPXL_20221114_222555849.jpgPXL_20221114_233748631.jpg 
  458   Tue Nov 15 11:12:24 2022 KojiOpticsGeneralOMC #1 fogging on the AR side of BS1 cleaned[Camille, Koji]

Photo of the BS1 AR cleaning process

Attachment 1: Before cleaning.
 PXL_20221114_225338114.jpgPXL_20221114_232824245.jpgPXL_20221114_233714774.jpgPXL_20221114_233748631.jpg 
  459   Thu Nov 17 18:56:22 2022 KojiOpticsGeneral Transmission measurements of OMC #1 after deep cleaning[Camille, Koji]

- Removed the first contact we
left on Monday.
 PXL_20221117_232145418.jpgScreen_Shot_2022-11-17_at_19.02.31.png 
  460   Thu Nov 17 19:50:00 2022 KojiOpticsCharacterizationConclusion on the cleaning of OMC #001Conclusion on the cleaning of OMC
#001

- After a couple of first contact
 OMC_loss.pdf 
  461   Fri Nov 18 18:41:05 2022 Camille MakaremGeneralGeneral2nd deep cleaning of OMC #1The four cavity mirrors in OMC #1 were
each scrubbed using acetone and a cotton
swab.
 PXL_20221118_213955948.jpg 
  462   Mon Nov 21 19:13:35 2022 KojiGeneralGeneralTransmission measurement (2nd deep cleaning of OMC #1)OMC Transmission measurement after
the 2nd deep cleaning

The 2nd deep cleaning didn't
 PXL_20221122_030736513.jpgOMC_loss.pdf 
  463   Tue Nov 29 15:54:47 2022 KojiGeneralConfigurationWindows laptop for WincamD Beam'R2 recoveryAaron took the set to Cryo lab

 
  
  464   Fri Dec 2 11:42:03 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminants[Camille, Koji] Log of the work
on Nov 30, 2022

 


The
following is the notes from GariLynn




 PXL_20221130_234101575.jpgPXL_20221130_234013958.jpgPXL_20221201_021727724.jpgScreen_Shot_2022-12-02_at_12.43.02.png 
  465   Fri Dec 2 12:38:15 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminantsAnother set of FC cleaning was applied
to FM1/FM2/CM1/CM2 and SM2. Some FC strings
are visible on SM2. So I decided to clean
 PXL_20221202_034932211.jpgOMC_loss.pdf 
  466   Fri Dec 2 23:58:33 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminantsThe second trial of the water scrub

A bright scatter is visible on
FM1, so I tried water scrub on FM1. This
 PXL_20221203_063327268.jpgOMC_loss.pdf 
  467   Mon Dec 5 20:09:39 2022 KojiOpticsGeneral(re)starting the OMC #4 build[Camille Koji]

We started buikding the
OMC #4. 
 PXL_20221205_233712211.jpg 
  468   Fri Dec 9 13:13:13 2022 KojiOpticsCharacterizationFSR/TMS/Spot Positions/Transmission[Camille Koji]

We quickly measured the basic parameters
of the OMC as is.
 HOM_plot_PZT.pdfOMC4_spot.pngPXL_20221208_233706115.jpg 
  469   Mon Dec 12 19:04:40 2022 KojiOpticsCharacterizationFSR/TMS/Spot Positions/Transmission 2nd trial[Camille Koji]

We replaced CM2 with a PZT mirror
subassembly serialized by PZT "13"
 PXL_20221212_235351320.jpgOMC4_spot.pngHOM_plot_PZT.pdfPXL_20221213_000406843.jpgScreen_Shot_2022-12-12_at_19.36.10.png 
  470   Mon Dec 19 18:51:50 2022 KojiOpticsCharacterizationTMS measurement with the PZT voltages altered[Camille, Koji] Log of
the work on Dec 15, 2023

The vertical and horizontal
 Cav_scan_response_PZT1_0_Pitch.pdfCav_scan_response_PZT1_0_Yaw.pdfOMC_20221215.pdfHOM_plot_PZT0_0.pdfHOM_PZTV_PZT1_0V.pdf 
  471   Thu Jan 19 23:45:44 2023 KojiOpticsGeneralOMC #4: cavity mirror bonding[Koji, Camille]

We worked on the bonding of the
flat mirrors for the OMC cavity with UV epoxy.
  
  472   Mon Jan 23 19:51:20 2023 KojiOpticsGeneralOMC #4: cavity mirror bonding[Camille, Koji]

We continued to bond two CM mirrors
and the other two steering mirrors for QPD2.
 HOM_plot_PZT0_0.pdfPXL_20230124_032358482.MP.jpgPXL_20230124_032452805.MP.jpgPXL_20230124_032425638.jpg 
  473   Wed Jan 25 23:51:04 2023 KojiGeneralGeneralThe items packed for DownsQty1 1/2 mounts
Qty2 prism mounts
Qty6 gluing fixures
 PXL_20230127_055920944.jpg 
  474   Thu Jan 26 22:57:19 2023 KojiOpticsGeneralOMC #4: One Invar block bonded with tilt[Camille, Koji]

The bottom side template was separated
into two pieces and successfully removed
 PXL_20230126_221425695.jpgPXL_20230126_221522416.jpg 
  475   Thu Jan 26 23:07:14 2023 KojiOpticsGeneralOMC #4: Input beam dump bonding[Camille, Koji]

During the second UV epoxy session,
we did not bond the input beam dump. This
 PXL_20230126_221556977.jpg 
  476   Thu Jan 26 23:16:35 2023 KojiOpticsConfigurationOMC #4: Top side bonding.[Camille, Koji]
 PXL_20230126_235309334.jpgPXL_20230127_053008237.jpgPXL_20230127_053020709_2.jpgPXL_20230127_053042809.MP_2.jpgPXL_20230127_053058275_2.jpg 
  477   Thu Jan 26 23:46:13 2023 KojiOpticsGeneralOMC #1 input beam dump bondingA beam dump was stacked on the base of
the previous beam dump. The angle was determined
so that the main transmission goes through
 PXL_20230127_052955482.jpgPXL_20230127_052949869.jpg 
  478   Sat Jan 28 00:38:56 2023 KojiMechanicsGeneralOMC #1 cable bracket replacement / OMC #1 repair completedThe AL metal bracket was replaced with
a PEEK version.

Attachments 1/2: Before the replacement.
 PXL_20230128_011405446.jpgPXL_20230128_011401778.jpgPXL_20230128_013509885.jpgPXL_20230128_014001006.jpgPXL_20230128_014035044.jpg 
  479   Sat Jan 28 00:46:21 2023 KojiMechanicsGeneralOMC #4: Replaced the locks of the transport fixture Yesterday, we noticed that we could not
close the transport fixture for OMC #4. We
could not fully rotate the knobs of the locks.
 PXL_20230128_022952669.jpg 
  480   Wed Feb 1 01:33:03 2023 KojiMechanicsGeneral5th OMC Transport FixtureThe transport fixture was brought to the
40m clean room to use as an assembly reference.
 PXL_20230201_005912224.jpg 
  481   Wed Feb 1 01:39:41 2023 KojiMechanicsGeneralDCPD housing / QPD housingInserted 4-40 and 2-56 helicoils into the
DCPD/QPD housings for the 4th OMC. The retainer
caps were also fastened to the housings.
 PXL_20230201_021505299.jpgPXL_20230201_021455728.jpg 
  482   Wed Feb 1 01:44:14 2023 KojiGeneralGeneralOMC (004) plan2/1 2:30PM~ Bonding reinforcement (Last
EP30-2 gluing)

2/2 1:00PM~ Peripheral attachment
  
  483   Thu Feb 2 03:09:41 2023 KojiOpticsGeneralOMC #4: One Invar block bonded with tilt[Camille, Thejas, Koji]

We added a reinforcement bar at
the back of the invar block which had the
 PXL_20230202_003156761.jpgPXL_20230202_003204058.jpg 
  484   Sat Feb 4 03:16:10 2023 KojiOpticsGeneralOMC #4: One Invar block bonded with tiltThe attached photo shows the resulting
bond spread.

 
 PXL_20230202_213114009.jpg 
  485   Sat Feb 4 03:22:46 2023 KojiFacilityGeneralReady for the HEPA enclosure expansionHEPA is quite low for a tall person and
also the curtain on the back of us is always
heavy. It's very tough for anyone to
 PXL_20230202_002014960.MP.jpgPXL_20230203_011618168.MP.jpgPXL_20230203_011633873.jpg 
  486   Sat Feb 4 03:30:02 2023 KojiElectronicsGeneralOMC cables #4 arrived The OMC cables #4 arrived on Feb 3rd. (See
Attachment)

This shipment included two DCPD
 PXL_20230202_210750100.jpg 
  487   Sat Feb 4 03:33:22 2023 KojiGeneralGeneralOMC Lab InventoryAttachment 1: North Cabinet 2nd from the
left

Attachment 2: North Cabinet 3rd
 PXL_20230204_072749311.jpgPXL_20230204_072744686.MP.jpgPXL_20230204_073603041.MP.jpg 
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