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ID Date Author Type Categoryup Subject
  449   Tue Sep 20 08:54:33 2022 KojiGeneralGeneralPD cage arrangement

Upon the LLO work, the current PD arrangement in the cages are:
CAGE B
B1 OMC1 PDT (A1-23)
B2 OMC1 PDR (A1-25)
B3 original (C1-03)
B4 OMC2 PDT (B1-22)

CAGE C
C1 OMC2 PDR (B1-23)
C2 original (C1-08)
C3 original (C1-09)
C4 original (C1-10)

  450   Mon Sep 26 14:27:49 2022 KojiGeneralGeneralLLO OMC ICS work

OMC #001

OMC #002

  453   Fri Nov 11 19:07:48 2022 KojiSupplyGeneralSupply Order

Clean Supply Ordered

  • TexWipe TX8410 AlphaSat Vectra Alpha 10 50 sheets x 12 pk  (VWR TWTX8410)
  • Mask KIMTECH PURE® M3 Pleat-Style Face Masks 50 masks x 10 pk (VWR 15628-213)
  • Stainless Pan x3 (VWR 10193-562)
  • Ansell Accutech Latex Gloves 6.5 25*8pk (Fisher 19162026)
  • Ansell Accutech Latex Gloves 7.0 25*8pk (Fisher 19162027)
  456   Tue Nov 15 07:46:58 2022 Camille MakaremOpticsGeneralcleaning OMC #1

Monday, November 14, 2022

Camille and Koji did a "deep cleaning" of OMC#1:
1) Applied First Contact to the mirror surfaces. Removed first contact after ~10 minutes.
2) Acetone scrub of the mirror surfaces with a cotton swab.
3) Applied First Contact again. Removed after ~10 minutes. We left the FC paint on for the work on Thu.

The foggy spot on the input mirror was unchanged after the first round of First Contact. But the foggy spot came off during the acetone scrub.

  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 base.
The black glass pieces were bonded very tightly on the FS base with EP30-2. The apparent amount of the bond was not so much but it was such hard that removal by hand was not possible.
We decided to give drips of Acetone on the base hoping the gradual dissolving of EP30-2. Using a knife edge, the "filets" of the bonds were removed, but the BD was still tight.

By wedging the black glass-black glass bonding with the nife edge, the left side (the directly damaged one) was taken off from the structure leaving a tiny fragment of the glass on the base.

The remaining one was even stronger. We patiently kept dripping Acetone on the base and finally, the black glass piece was knocked off and removed from the base.

Attachment 1: The base right after the black glass removal.

Attachment 2: The black glass pieces were stored in a container with Al foil + clean cloth bed. The damaged and fogged surfaces faced up.

Attachment 3: The zoom-in shot of the black glass pieces.

Attachment 4: The base was wiped with Acetone and cleaned with FC. We will bond another BD assembly on the base, presumably using the UV epoxy.

Attachment 1: PXL_20221114_222641455.jpg
PXL_20221114_222641455.jpg
Attachment 2: PXL_20221114_222544330.jpg
PXL_20221114_222544330.jpg
Attachment 3: PXL_20221114_222555849.jpg
PXL_20221114_222555849.jpg
Attachment 4: PXL_20221114_233748631.jpg
PXL_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. Foggy surface is visible.

Attachment 2: After FC cleaning. The structure of the deposited material is still quite visible.

Attachment 3: Acetone scrubbing. Cotton Q-tip was used so that the stick does not melt with acetone.

Attachment 4: After acetone scrubbing. Nicely clean!

Acetone scrubbing was applied to HR/AR of BS1, FM1, FM2, BS2, and HR of CM1 and CM2. (total 10 surfaces)
Then final FC paint was applied to these 10 surfaces.

We'll come back to the setup on Thu for FC peeling and loss measurement.

Attachment 1: PXL_20221114_225338114.jpg
PXL_20221114_225338114.jpg
Attachment 2: PXL_20221114_232824245.jpg
PXL_20221114_232824245.jpg
Attachment 3: PXL_20221114_233714774.jpg
PXL_20221114_233714774.jpg
Attachment 4: PXL_20221114_233748631.jpg
PXL_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.

- Measured transmission (Set1) Very high loss! Total optical loss of 18.5%! Observation with the IR viewer indicated that CM1 has bright scattering. We suspencted a remnant of FC.

- Applied the second FC on the four cavity mirrors. This made the CM1 sport darker.

- Measured the transmission (Set1~Set3). We had consistent loss of 4.2~5.0%. We concluded that this is the limitation of this OMC even with the cleaning.

Attachment 1: PXL_20221117_232145418.jpg
PXL_20221117_232145418.jpg
Attachment 2: Screen_Shot_2022-11-17_at_19.02.31.png
Screen_Shot_2022-11-17_at_19.02.31.png
  461   Fri Nov 18 18:41:05 2022 Camille MakaremGeneralGeneral2nd deep cleaning of OMC #1

The four cavity mirrors in OMC #1 were each scrubbed using acetone and a cotton swab.
Then, the four mirrors were painted with First Contact (picture attached). The First Contact was allowed to dry for 20 minutes, then removed while using the top gun.

Attachment 1: PXL_20221118_213955948.jpg
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 improve the transmission. (See Attachment 2)
The measured loss was 0.044+/-0.002

 

Attachment 1: PXL_20221122_030736513.jpg
PXL_20221122_030736513.jpg
Attachment 2: OMC_loss.pdf
OMC_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.

  • Removed OMC #1 from the optical setup and placed it at a safe side on the optical table/
  • Fixed OMC #4 in the optical setup
  • Cleaned the OMC cavity mirrors
  • Placed the OMC cavity mirrors
    • FM1: A1
    • FM2: A3
    • CM1: PZT #11
    • CM2: PZT #12
  • Aligned the beam to the cavity
  • Locked the cavity on TEM00
  • Finely aligned the beam to the cavity
Attachment 1: PXL_20221205_233712211.jpg
PXL_20221205_233712211.jpg
  248   Fri Dec 18 15:33:24 2015 KojiGeneralLoan / LendingLoan from Rich

Loan Record: I borrowed a PD can opener from Rich => Antonio Returned Sep 9, 2016

Tungsten Carbide Engraver (permanently given to the OMC lab)

KEITHLEY SOURCE METER + Laptop

  250   Thu Feb 18 21:08:32 2016 KojiGeneralLoan / Lending(all returned) Antonio loan

Antonio borrowed: Rich's PD cutter (returned), Ohir power meter(returned), Thorlabs power meter head, Chopper

  258   Tue Apr 5 18:14:55 2016 KojiGeneralLoan / LendingQPD Lending Crackle

Xiaoyue

QPD head
X-Z stage
Mounting brackets
DB15 cable
QPD matrix circuit
+/-18V power supply cable

  293   Thu May 3 21:45:58 2018 awadeGeneralLoan / LendingBorrowed toaster oven

I’ve borrowed the black and decker toaster oven to dry some sonicated parts. It is temporarly located in the QIL lab. 

Attachment 1: 9CE80545-7A58-4236-B7E3-1EE6C4042DAA.jpeg
9CE80545-7A58-4236-B7E3-1EE6C4042DAA.jpeg
  385   Tue Oct 22 15:54:59 2019 KojiElectronicsLoan / LendingBorrowed LB1005 from Cryo Cav

From Cryo Cav setup

Borrowed LB1005 Servo box -> OMC

 

  391   Mon Aug 10 15:34:04 2020 KojiFacilityLoan / LendingGlue bake oven

Black 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.

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