40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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ID Dateup Author Type Category Subject Text Attachments
  402   Sat Nov 21 13:58:30 2020 KojiElectronicsCharacterizationDark Current Measurement for InGaAs QPDsDark current measurement for InGaAs QPDs
(OSI FCI-InGaAs-Q3000) has been done using
Keithley 2450 and Frank's diode test
 Q3000_dark_current.pdf 
  403   Sun Nov 22 13:49:12 2020 KojiElectronicsCharacterizationImpedance Measurement for InGaAs QPDsTo know any anomaly to the junction
capacitance of the QPD segments, the RF impedances
were tested with a hand-made impedance measurement.
 impedance_measurement.pdfP_20201121_183830.jpgimpedance_test.pdfQ3000_impedance_test.pdf 
  404   Mon Nov 23 23:17:19 2020 KojiElectronicsCharacterizationThe dark noise of the Q3000 QPDsThe dark noise levels of the four Q3000
QPDs were measured with FEMTO DLPCA200 low
noise transimpedance amp.
 Q3000_dark_noise_81.pdfQ3000_dark_noise_82.pdfQ3000_dark_noise_83.pdfQ3000_dark_noise_84.pdf 
  405   Tue Nov 24 10:45:07 2020 gautamElectronicsCharacterizationThe dark noise of the Q3000 QPDsI see that these measurements are done
out to 100 kHz - I guess there is no reason
to suspect anything at 55 MHz which is where
  
  406   Tue Nov 24 12:27:18 2020 KojiElectronicsCharacterizationThe dark noise of the Q3000 QPDsThe amplifier BW was 400kHz at the gain
of 1e7 V/A. And the max BW is 500kHz even
at a lower gain. I have to setup something
  
  407   Fri Feb 5 07:40:37 2021 StephenSupplyGeneralOMC Unit 4 Build Machined PartsOMC Unit 4 Build Machined Parts are currently
located in Stephen's office. See image
of large blue box from office, below.
 IMG_8117.JPG 
  408   Thu May 20 17:03:50 2021 KojiGeneralGeneralSRS LCR meter SRS720 borrowed from DownsItem loan: SRS LCR meter SRS720 borrowed
from Downs. The unit is at the 40m right
now for testing with an excelitas PD. Once
 P_20210520_154841.jpg 
  409   Sun May 30 15:17:16 2021 KojiGeneralGeneralDCPD AF capacitance measirementAttachment 1: System diagram.
The reverse bias voltage is controlled by
DS335. This can produce a voltage offset
 PD_cap_meas.pdf20210529013015_IMG_0577.jpeg20210529013114_IMG_0580_2.jpeg20210529013200_IMG_0584.jpeg20210529013229_IMG_0586.jpeg 
  410   Sun May 30 15:32:56 2021 KojiGeneralGeneralDCPD AF capacitance measirementMeasurement result:

The capacitance at no bias was
460~500pF. This goes down to below 300pF
 highQEPD_capacitance.pdfC30665_capacitance.pdf 
  411   Wed Jul 7 14:21:50 2021 StephenSupplyGeneralOMC Unit 4 Build Machined PartsMore explicit insights into the inventory
for the Unit 4 build. Image of inventory
included below.
 IMG_9238.JPGIMG_9236.JPG 
  412   Thu Jun 23 21:03:33 2022 KojiFacilityGeneralMoving the small optical table to CAML (TCS Lab)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
 PXL_20220624_035628602.jpg 
  413   Tue Jun 28 16:13:34 2022 KojiGeneralGeneralThe small optical table not small enough to get outThe table width was an inch too large compared
to the door width. We need to tilt the table
and it seemed too much for us. Let's
 IMG-5203.jpg 
  414   Fri Jul 15 22:14:14 2022 KojiGeneralGeneralOMC Lab recovery for the OMC #002 test- The lab is chilly (18degC)

- Cleaned the lab and the optical
table a bit so that the delicate work can
 PXL_20220716_035922673.jpgPXL_20220716_025319391.MP.jpgPXL_20220716_025334324.jpgPXL_20220716_035309066.jpgPXL_20220716_035411435.NIGHT.jpg 
  415   Mon Jul 18 14:20:09 2022 KojiGeneralGeneralOMC #002 Plan Portal==
Initial Preparation ==


[Done] OMC #002
  
  416   Tue Jul 19 03:17:56 2022 KojiGeneralGeneralOMC #002 Power Budget before mirror cleaningo Power Budget (2022/07/18)
NPRO ADJ -50 (min)
Fiber incident 62.8mW
  
  417   Thu Jul 21 02:55:06 2022 KojiGeneralGeneralOMC #002 Power Budget after mirror cleaningo Power Budget after FirstContact
cleaning (2022/07/20)
NPRO ADJ -50 (min)
  
  418   Thu Jul 21 13:21:27 2022 KojiGeneralConfigurationWindows laptop for WincamD Beam'R2 recoveryThe Windows laptop for WincamD/Beam'R2
(DELL Vostro3300) was not functional. 
- Windows 7 got stuck in the starting
 IMG_1102.JPG 
  419   Thu Jul 21 14:35:35 2022 KojiGeneralGeneralBond reinforcement blocks for the invar bracketsBond reinforcement blocks for the
invar brackets:


Attachment 1:
 IMG_1095.JPGIMG_1091.JPG 
  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 
  421   Thu Jul 21 17:47:00 2022 KojiGeneralGeneralThe profile of the beam incident on the fiber input couplerThe profile of the beam incident on the
fiber input

The fiber input was deflected by
 fiber_beam_profile.pdf 
  422   Fri Jul 22 00:31:17 2022 KojiGeneralGeneralOMC #002 backscatter measurementMeasure the power ratio between the forward-propagating
and reverse-propagating beams.


Place a small deflecting
 OMC_backscatter.pdf 
  423   Fri Jul 22 17:41:01 2022 KojiGeneralGeneralSRS LCR meter SRS720 returned to DownsSRS LCR meter SRS720 was returned to Downs
as before.

 
 PXL_20220723_002330805.jpg 
  424   Fri Jul 22 17:47:38 2022 KojiGeneralGeneralC&B request for the reinforcement blocksOMC Reinforcement blocks

1. P/N D1600316; Version v4; Type
01; Qty 30; Source Chemistry Machine Shop
 PXL_20220722_222013127.jpg 
  425   Mon Jul 25 18:25:04 2022 KojiGeneralGeneralA/C Filter was replaced
New filter PN
Grainger
TK70457312T Mini-Pleat Air Filter,
  
  426   Tue Jul 26 00:01:59 2022 KojiGeneralGeneralOMC #002 delamination check 2More epoxy delamination check:

DCPD R (Attachment 1):
Found half delaminated
 IMG_1106.JPGIMG_1107.JPGIMG_1110.JPG 
  427   Tue Jul 26 00:12:58 2022 KojiGeneralGeneralHigh QE PD: QE measurements- Installed the High QE PDs to OMC #002


B1-22@Cage B1 was
installed to the transmission DCPD
B1-23@Cage
 IMG_1118.JPG 
  428   Wed Jul 27 10:09:51 2022 KojiGeneralGeneral4+4 wire clamp in handRegarding: D1200971

- 4 CLASS A wire clamp obtained
 PXL_20220727_072154009.jpg 
  429   Wed Jul 27 10:34:09 2022 KojiGeneralGeneralHigh QE PD: QE measurements 2- DLPCA-200 trans-impedance amplifier was
calibrated.
  Keithley source meter 2450
 IMG_1119.JPGIMG_1120.JPG 
  430   Wed Jul 27 10:34:30 2022 KojiGeneralGeneralOMC #002 Protective FirstContact PaintThe optical surfaces were coated with FirstContact
to keep them clean / somewhat protected during
the transportation.
 IMG_1125.JPG 
  431   Wed Jul 27 23:52:18 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (1)Parts
check

- D1300052-V3 SN001 is going to
 IMG_1126.JPGIMG_1135.JPGIMG_1127.JPGIMG_1129.JPGIMG_1130.JPG 
  432   Thu Jul 28 00:28:15 2022 KojiGeneralGeneral OMC #002 Cable bracket replacement (2) Connector
unmounting

- (Attachment 1)
 IMG_1132.JPGIMG_1133.JPGIMG_1136.JPG 
  433   Thu Jul 28 00:46:47 2022 KojiGeneralGeneral Subject: OMC #002 Cable bracket replacement (3)Checking the spare parts 

- Conclusion for OMC#2:
need PEEK cable
 IMG_1137.JPGIMG_1148.JPGIMG_1138.JPG 
  434   Wed Aug 10 18:42:27 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (4)[Stephen Koji]

Now we got the C&Bed parts
to continue to work on the cable bracket
 PXL_20220809_235457354.jpgPXL_20220811_011910569.jpgPXL_20220811_013746139.jpg 
  435   Thu Aug 11 15:24:57 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (5)- The hole size extension
is going forwared now.
  
  436   Mon Aug 15 21:31:56 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (6) The cable bracket was successfully
replaced.


Looking from the QPD side
 IMG_1155.JPGIMG_1149.JPGIMG_1150.JPG 
  437   Mon Aug 15 22:06:18 2022 KojiGeneralGeneralOMC #002 new cable tie installed[Stephen Koji]

New cable ties were installed on
the cable pegs attached to the long sides
 IMG_1929.JPGIMG_1930.JPG 
  438   Mon Aug 15 22:43:35 2022 KojiGeneralGeneralOMC #002 Delamination repair Part1 (1)[Stephen Koji]

Checked the delamination
status:
 IMG_1926.JPGPXL_20220816_011346581.jpg 
  439   Mon Aug 15 22:49:03 2022 KojiGeneralGeneralOMC #002 Delamination repair Part1 (2)EP30-2
preparation


Two Al foil cups + A sheet
 7x 
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