| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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
|
|
|
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 |
|
|
393
|
Mon Sep 28 16:03:13 2020 |
rana | General | General | OMC Beam Dump Production Cure Bake |
are there any measurements of the BRDF
of these things? I'm curious how much
light is backscattered into the incoming |
|
|
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), |
|
|
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 |
|
|
407
|
Fri Feb 5 07:40:37 2021 |
Stephen | Supply | General | OMC Unit 4 Build Machined Parts | OMC Unit 4 Build Machined Parts are currently
located in Stephen's office. See image
of large blue box from office, below. |
|
|
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 |
|
|
411
|
Wed Jul 7 14:21:50 2021 |
Stephen | Supply | General | OMC Unit 4 Build Machined Parts | More explicit insights into the inventory
for the Unit 4 build. Image of inventory
included below. |
|
|
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) |
|
|
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 |
|
|
435
|
Thu Aug 11 15:24:57 2022 |
Koji | General | General | OMC #002 Cable bracket replacement (4) | - The hole size extension
is going forwared now. |
|
|
4
|
Wed Jun 20 20:37:45 2012 |
Zach | Optics | Configuration | Topology / parameter selection | EDIT (ZK): All the plots here were generated |
8x |
|
5
|
Thu Jun 21 03:07:27 2012 |
Zach | Optics | Configuration | Parameter selection / mode definition | EDIT 2 (ZK): As with the |
|
|
36
|
Thu Nov 8 19:47:55 2012 |
Koji | Electronics | Configuration | Solder for PZTs | Rich saids:
I |
|
|
38
|
Thu Nov 8 20:12:10 2012 |
Koji | Optics | Configuration | How many glass components we need for a plate | Optical prisms 50pcs (A14+B12+C6+E18)
Curved Mirrors 25pcs (C13+D12)
|
|
|
55
|
Fri Jan 18 13:25:17 2013 |
Koji | Optics | Configuration | Autocollimator calibration | An autocollimator (AC) should show (0,0)
if a retroreflector is placed in front of
the AC. |
|
|
63
|
Thu Feb 21 18:44:18 2013 |
Koji | Optics | Configuration | Perpendicularity test | Perpendicularity test of the mounting
prisms:
The perpendicularity of the prism |
|
|
64
|
Wed Feb 27 18:18:48 2013 |
Koji | Optics | Configuration | More perpendicularity test | Mounting Prisms:
(criteria: 30arcsec = 145urad =>
0.36mm spot shift) |
|
|
65
|
Fri Mar 1 23:06:15 2013 |
Koji | Optics | Configuration | More perpendicularity test final | Perpendicularity of the "E" mirror
was measured.
Mounting Prisms: |
|
|
86
|
Thu Mar 28 03:37:07 2013 |
Zach | Optics | Configuration | Test setup input optics progress | [Lisa, Zach]
Last night (Tuesday), I finished
setting up and aligning most of the input |
|
|
87
|
Fri Mar 29 08:55:00 2013 |
Zach | Optics | Configuration | Beam launched into fiber |
|
|
|
94
|
Thu Apr 4 00:35:42 2013 |
Zach | Optics | Configuration | MMT installed on breadboard, periscope built | [Koji, Zach]
|
|