| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
368
|
Mon Jun 24 12:54:58 2019 |
Koji | Clean | General | HEPA BOOTH | https://www.airscience.com/purair-flow-laminar-flow-cabinets |
|
|
369
|
Mon Jul 1 12:38:49 2019 |
Koji | Optics | Characterization | A and M prisms perpendicularity measurement | [Stephen, Koji]
The perpendicularity of
some of the A and M prisms were tested. |
6x |
|
370
|
Mon Jul 1 12:49:42 2019 |
Koji | Optics | Characterization | Scattering measurement of A and C mirrors | Liyuan's scattering measurement for
the A and C mirrors. |
|
|
378
|
Mon Sep 23 21:29:51 2019 |
Koji | Optics | General | OMC(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 |
|
|
381
|
Mon Sep 30 23:16:53 2019 |
Koji | Optics | General | OMC(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 |
|
|
385
|
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 |
|
|
386
|
Fri Dec 6 00:55:25 2019 |
Koji | Optics | General | Beamdump gluing | [Stephen, Koji]
20 glass beamdumps were
bonded at the 40m cleanroom. |
6x |
|
388
|
Wed Dec 18 21:54:53 2019 |
Koji | General | General | OMC Beam Dump Production Cure Bake | The beamdumps were taken out from the oven
and packed in bags.
The bottom of the V are completely |
|
|
389
|
Thu Feb 27 14:31:13 2020 |
Koji | General | General | Item lending | Item lending as per Ian's request:
Particle Counter from OMC Lab to QIL
|
|
|
390
|
Mon Aug 10 15:29:54 2020 |
Koji | General | General | Item lending | The particle counter came back to the OMC
lab on Aug 10, 2020
|
|
|
391
|
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. |
|
|
392
|
Mon Aug 10 15:53:46 2020 |
Koji | General | General | Lab status check | Check-in to the OMC lab to see the status.
Nothing seemed changed. No bug. The HEPA
is running normal. The particle level was |
|
|
394
|
Mon Sep 28 16:13:08 2020 |
Koji | General | General | OMC Beam Dump Production Cure Bake | According to the past backscatter test
of the OMC (and the black glass beamdump:
not V type but triangular type on a hexagonal-mount), |
|
|
395
|
Thu Oct 8 19:55:22 2020 |
Koji | General | Characterization | Power Measurement of Mephisto 800NE 1166A | The output of Mephisto 800NE (former TNI
laser) was measured.
The output power was measured with |
|
|
396
|
Fri Oct 9 01:01:01 2020 |
Koji | General | General | TFT Monitor mounting | To spare some room on the optical table,
I wanted to mount the two TFT monitor units
on the HEPA enclosure frame. |
|
|
397
|
Fri Oct 16 00:53:29 2020 |
Koji | General | General | TFT Monitor mounting | The image flipping of the display unit
was fixed. The vendor told me how to fix
it. |
|
|
398
|
Fri Oct 23 19:09:54 2020 |
Koji | General | General | Particle counter transfered to Radhika | See this entry: https://nodus.ligo.caltech.edu:8081/40m/15642 |
|
|
399
|
Fri Nov 6 18:38:00 2020 |
Koji | General | General | Powermeter lent from OMC Lab to 2um ECDL | Thorlabs' powermeter controler +
S401C head was lent from OMC Lab. Returned
to OMC Jul 15, 2022 KA |
|
|
400
|
Mon Nov 9 22:06:18 2020 |
Koji | Mechanics | General | 5th OMC Transport Fixture | I helped to complete the 5th OMC Transport
Fixture. It was built at the 40m clean room
and brought to the OMC lab. The fixture hardware |
|
|
401
|
Fri Nov 20 18:51:23 2020 |
Koji | General | General | Instrument loan | FEMTO DLPCA200 low noise preamp (brand
new)
Keithley Source Meter 2450 (brand |
|
|
402
|
Sat Nov 21 13:58:30 2020 |
Koji | Electronics | Characterization | Dark Current Measurement for InGaAs QPDs | Dark current measurement for InGaAs QPDs
(OSI FCI-InGaAs-Q3000) has been done using
Keithley 2450 and Frank's diode test |
|
|
403
|
Sun Nov 22 13:49:12 2020 |
Koji | Electronics | Characterization | Impedance Measurement for InGaAs QPDs | To know any anomaly to the junction
capacitance of the QPD segments, the RF impedances
were tested with a hand-made impedance measurement. |
|
|
404
|
Mon Nov 23 23:17:19 2020 |
Koji | Electronics | Characterization | The dark noise of the Q3000 QPDs | The dark noise levels of the four Q3000
QPDs were measured with FEMTO DLPCA200 low
noise transimpedance amp. |
|
|
406
|
Tue Nov 24 12:27:18 2020 |
Koji | Electronics | Characterization | The dark noise of the Q3000 QPDs | The 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 |
|
|
408
|
Thu May 20 17:03:50 2021 |
Koji | General | General | SRS LCR meter SRS720 borrowed from Downs | Item loan: SRS LCR meter SRS720 borrowed
from Downs. The unit is at the 40m right
now for testing with an excelitas PD. Once |
|
|
409
|
Sun May 30 15:17:16 2021 |
Koji | General | General | DCPD AF capacitance measirement | Attachment 1: System diagram.
The reverse bias voltage is controlled by
DS335. This can produce a voltage offset |
|
|
410
|
Sun May 30 15:32:56 2021 |
Koji | General | General | DCPD AF capacitance measirement | Measurement result:
The capacitance at no bias was
460~500pF. This goes down to below 300pF |
|
|
412
|
Thu Jun 23 21:03:33 2022 |
Koji | Facility | General | Moving 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 |
|
|
413
|
Tue Jun 28 16:13:34 2022 |
Koji | General | General | The small optical table not small enough to get out | The 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 |
|
|
414
|
Fri Jul 15 22:14:14 2022 |
Koji | General | General | OMC 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 |
|
|
415
|
Mon Jul 18 14:20:09 2022 |
Koji | General | General | OMC #002 Plan Portal | ==
Initial Preparation ==
[Done] OMC #002 |
|
|
416
|
Tue Jul 19 03:17:56 2022 |
Koji | General | General | OMC #002 Power Budget before mirror cleaning | o Power Budget (2022/07/18)
NPRO ADJ -50 (min)
Fiber incident 62.8mW |
|
|
417
|
Thu Jul 21 02:55:06 2022 |
Koji | General | General | OMC #002 Power Budget after mirror cleaning | o Power Budget after FirstContact
cleaning (2022/07/20)
NPRO ADJ -50 (min) |
|
|
418
|
Thu Jul 21 13:21:27 2022 |
Koji | General | Configuration | Windows laptop for WincamD Beam'R2 recovery | The Windows laptop for WincamD/Beam'R2
(DELL Vostro3300) was not functional.
- Windows 7 got stuck in the starting |
|
|
419
|
Thu Jul 21 14:35:35 2022 |
Koji | General | General | Bond reinforcement blocks for the invar brackets | Bond reinforcement blocks for the
invar brackets:
Attachment 1: |
|
|
420
|
Thu Jul 21 14:55:48 2022 |
Koji | General | General | Optics bonding for the backscatter measurement | The backscatter beam is supposed to appear
in the backpropagation path. The transmission
of the OMC has a couple of optics, it's |
|
|
421
|
Thu Jul 21 17:47:00 2022 |
Koji | General | General | The profile of the beam incident on the fiber input coupler | The profile of the beam incident on the
fiber input
The fiber input was deflected by |
|
|
422
|
Fri Jul 22 00:31:17 2022 |
Koji | General | General | OMC #002 backscatter measurement | Measure the power ratio between the forward-propagating
and reverse-propagating beams.
Place a small deflecting |
|
|
423
|
Fri Jul 22 17:41:01 2022 |
Koji | General | General | SRS LCR meter SRS720 returned to Downs | SRS LCR meter SRS720 was returned to Downs
as before.
|
|
|
424
|
Fri Jul 22 17:47:38 2022 |
Koji | General | General | C&B request for the reinforcement blocks | OMC Reinforcement blocks
1. P/N D1600316; Version v4; Type
01; Qty 30; Source Chemistry Machine Shop |
|
|
425
|
Mon Jul 25 18:25:04 2022 |
Koji | General | General | A/C Filter was replaced |
New filter PN
Grainger
TK70457312T Mini-Pleat Air Filter, |
|
|
426
|
Tue Jul 26 00:01:59 2022 |
Koji | General | General | OMC #002 delamination check 2 | More epoxy delamination check:
DCPD R (Attachment 1):
Found half delaminated |
|
|
427
|
Tue Jul 26 00:12:58 2022 |
Koji | General | General | High 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 |
|
|
428
|
Wed Jul 27 10:09:51 2022 |
Koji | General | General | 4+4 wire clamp in hand | Regarding: D1200971
- 4 CLASS A wire clamp obtained |
|
|
429
|
Wed Jul 27 10:34:09 2022 |
Koji | General | General | High QE PD: QE measurements 2 | - DLPCA-200 trans-impedance amplifier was
calibrated.
Keithley source meter 2450 |
|
|
430
|
Wed Jul 27 10:34:30 2022 |
Koji | General | General | OMC #002 Protective FirstContact Paint | The optical surfaces were coated with FirstContact
to keep them clean / somewhat protected during
the transportation. |
|
|
431
|
Wed Jul 27 23:52:18 2022 |
Koji | General | General | OMC #002 Cable bracket replacement (1) | Parts
check
- D1300052-V3 SN001 is going to |
|
|
432
|
Thu Jul 28 00:28:15 2022 |
Koji | General | General | OMC #002 Cable bracket replacement (2) | Connector
unmounting
- (Attachment 1) |
|
|
433
|
Thu Jul 28 00:46:47 2022 |
Koji | General | General | Subject: OMC #002 Cable bracket replacement (3) | Checking the spare parts
- Conclusion for OMC#2:
need PEEK cable |
|
|
434
|
Wed Aug 10 18:42:27 2022 |
Koji | General | General | OMC #002 Cable bracket replacement (4) | [Stephen Koji]
Now we got the C&Bed parts
to continue to work on the cable bracket |
|