40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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New entries since:Wed Dec 31 16:00:00 1969
Entry  Thu May 20 17:03:50 2021, Koji, General, General, SRS LCR meter SRS720 borrowed from Downs P_20210520_154841.jpg
Item loan: SRS LCR meter SRS720 borrowed from Downs. The unit is at the 40m right now for testing with an excelitas PD. Once it is done, the setup will
be moved to the OMC lab for testing the high QE PDs
    Reply  Sun May 30 15:17:16 2021, Koji, General, General, DCPD AF capacitance measirement PD_cap_meas.pdf20210529013015_IMG_0577.jpeg20210529013114_IMG_0580_2.jpeg20210529013200_IMG_0584.jpeg20210529013229_IMG_0586.jpeg
Attachment 1: System diagram. The reverse bias voltage is controlled by DS335. This can produce a voltage offset up to 10V. A G=+2 opamp
circuit was inserted so that a bias of up to +15V can be produced. The capacitances of the photodiodes were measured with SR720 LCR meter with a probe.
DS335 and SR720 were controlled from PC/Mac via serial connections.
    Reply  Sun May 30 15:32:56 2021, Koji, General, General, DCPD AF capacitance measirement highQEPD_capacitance.pdfC30665_capacitance.pdf
Measurement result:

The capacitance at no bias was 460~500pF. This goes down to below 300pF at 1.0~1.5V reverse bias. At maximum +15V, the capacitance goes down
to 200~220pF.
    Reply  Wed Jul 7 14:21:50 2021, Stephen, Supply, General, OMC Unit 4 Build Machined Parts IMG_9238.JPGIMG_9236.JPG
More explicit insights into the inventory for the Unit 4 build. Image of inventory included below.

Machined Parts:


New fabrication = Contents of Storage-11112 are consistent with
Entry  Thu Jun 23 21:03:33 2022, Koji, Facility, General, Moving the small optical table to CAML (TCS Lab) PXL_20220624_035628602.jpg
I've cleared the small optical table and wondered how to move it out of the room. Fortunately, the north side of the big table had wide enough clearance
and let the 36" wide table go through. This was easy without moving other heavy stuff.

From here to the door, a bit of work is required. A possibility is to roll the laser blocking wall to the south side of the big table. This will
Entry  Fri Dec 18 15:33:24 2015, Koji, General, Loan / Lending, Loan 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
Entry  Thu Feb 18 21:08:32 2016, Koji, General, Loan / Lending, (all returned) Antonio loan 
Antonio borrowed: Rich's PD cutter (returned), Ohir power meter(returned), Thorlabs power meter head, Chopper
Entry  Tue Apr 5 18:14:55 2016, Koji, General, Loan / Lending, QPD Lending Crackle 
Xiaoyue

QPD head
X-Z stage
Entry  Thu May 3 21:45:58 2018, awade, General, Loan / Lending, Borrowed toaster oven 9CE80545-7A58-4236-B7E3-1EE6C4042DAA.jpeg
I’ve borrowed the black and decker toaster oven to dry some sonicated parts. It is temporarly located in the QIL lab. 
Entry  Tue Oct 22 15:54:59 2019, Koji, Electronics, Loan / Lending, Borrowed LB1005 from Cryo Cav 
From Cryo Cav setup

Borrowed LB1005 Servo box -> OMC

 
Entry  Mon Aug 10 15:34:04 2020, Koji, Facility, Loan / Lending, Glue 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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