ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
405
|
Tue Nov 24 10:45:07 2020 |
gautam | Electronics | Characterization | The dark noise of the Q3000 QPDs | I 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 |
|
|
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. |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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.
https://nodus.ligo.caltech.edu:8081/SUS_Lab/1856 |
|
|
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 |
|
|
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. |
|
|
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. |
|
|
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 |
|
|
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), |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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
|
|
|
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
|
|
|
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 |
|
|
387
|
Fri Dec 13 14:59:18 2019 |
Stephen | General | General | OMC Beam Dump Production Cure Bake | [Koji, Jordan, Stephen]
The beam dumps, bonded on Fri 06
Dec 2019, were placed in the newly tuned |
|
|
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 |
|
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 |
|
|
384
|
Tue Oct 22 11:56:09 2019 |
Stephen | Supply | General | Epoxy Status update as of 22 October 2019 | The following is the current status of
the epoxies used in assembly of the OMC (excerpt
from C1900052) |
|
|
383
|
Tue Oct 22 11:52:53 2019 |
Stephen | General | General | Epoxy Curing Timeline of OMC PZT Assy #9 and #10 | This post captures the curing timeline
followed by OMC PZT Assys #9 and #10.
Source file posted in case any |
|
|
382
|
Tue Oct 22 10:25:01 2019 |
Stephen | General | General | OMC PZT Assy #9 and #10 Production Cure Bake | OMC PZT Assy Production Cure Bake (ref.
OMC
elog 381) for PZT Assy #9 and #10 started |
|
|
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 |
|
|
380
|
Thu Sep 26 17:33:52 2019 |
Stephen | General | General | Dirty ABO test run prior to PZT Subassembly Bonding - ABO is Ready! | Follow up on OMC
elog 379
I was able to obtain the following |
|
|
379
|
Tue Sep 24 12:19:20 2019 |
Stephen | General | General | Dirty ABO test run prior to PZT Subassembly Bonding | The 40m Bake Lab's
Dirty ABO's OMEGA PID controller was
borrowed for another oven in the Bake Lab |
|
|
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 |
|
|
377
|
Wed Sep 18 23:38:52 2019 |
Stephen | General | General | Dirty ABO ready for PZT Subassembly Bonding | The 40m Bake Lab's
Dirty ABO's OMEGA PID controller was
borrowed for another oven in the Bake Lab, |
|
|
376
|
Wed Sep 18 23:16:06 2019 |
Stephen | Supply | General | Items staged at 40m Bake Lab for PZT Subassembly Bonding | The following items are presently staged
at the 40m Bake Lab (see photo indicating
current location) (noting items broght by |
|
|
375
|
Wed Sep 18 22:30:11 2019 |
Stephen | Supply | General | EP30-2 Location and Status | Here is a summary of the events of the
last week, as they relate to EP30-2.
1) I lost the EP30-2 syringes that |
|
|
374
|
Thu Sep 5 15:40:42 2019 |
shruti | Optics | Configuration | PZT Sub-Assembly | Aim: To find the combinations
of mounting prism+PZT+curved mirror to build
two PZT sub-assemblies that best minimises |
|
|
373
|
Thu Aug 29 11:51:49 2019 |
shruti | Optics | Characterization | Wedging of the debonded PZTs - Calculation | Using the measurements of PZTs 12,13 taken
by Stephen, I estimated the wedging angle
and orientation following Section 2.3.1 of |
|
|
372
|
Fri Aug 23 11:11:44 2019 |
shruti | Optics | Characterization | Finding the curvature bottom | I attempted to fit the data taken
by Koji of the beam spot precession at the
CCD in order to find the location of the |
|
|
371
|
Thu Aug 22 12:35:53 2019 |
Stephen | Optics | Characterization | Wedging of the debonded PZTs 2019 August | Wedge and thickness measurements of PZTs
12 and 13 took place after debonding and
cleaning - results are shown in the first |
|
|
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. |
|
|
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 |
|
368
|
Mon Jun 24 12:54:58 2019 |
Koji | Clean | General | HEPA BOOTH | https://www.airscience.com/purair-flow-laminar-flow-cabinets |
|
|
367
|
Tue May 28 12:14:20 2019 |
Stephen | Optics | General | CM PZT Assembly Debonding of EP30-2 in Acetone | [LiyuanZ, StephenA]
Downs B119
Summary: |
8x |
|
366
|
Thu May 23 23:27:38 2019 |
Koji | Optics | Characterization | IGHQEX3000 high power test | LaserComponents IGHQEX3000 (Cage
B2: Serial# B1-23) was exposed to the beam
with the optical power from 1.6mW to 332mW. |
|
|
365
|
Thu May 23 01:42:46 2019 |
Koji | Optics | Characterization | C30665 high power test | An Excelitas C30665 PD with the
cap removed (SN07 in Case H slot #2) was
exposed to the beam with the optical power |
|
|
364
|
Wed May 22 07:31:37 2019 |
Koji | Optics | Configuration | Camera test (DCPD high power test) | C30665 (3mm) camera test. The camera was
Canon PowerShot G7X MkII. Exposure 1/15s,
F 5.6, ISO 125, MF (~the closest), no zoom. |
|
|
363
|
Mon May 20 19:53:17 2019 |
Koji | Optics | Configuration | DCPD high power test | We want to perform a damage test of OMC
DCPDs with high power beam. The OMC DCPD
is the 3mm InGaAs photodiodes with high quantum |
|