| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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]
|
|
|
97
|
Thu Apr 4 23:44:52 2013 |
Koji | Optics | Configuration | Beam launched into fiber | We had to move our flipper mirror to share
the beam between Peter's setup and ours as
our flipper is at the place where the ISS |
|
|
99
|
Fri Apr 5 18:18:36 2013 |
Zach | Optics | Configuration | AOM probably broken |
|
|
|
103
|
Mon Apr 8 20:56:52 2013 |
Koji | Optics | Configuration | PZT & Curverd Mirror arrangement | Assembly #1:
Mounting Prism #16
PZT #26 |
|
|
105
|
Mon Apr 8 23:42:33 2013 |
Koji | Optics | Configuration | Fake OMC roughly aligned | Mode matching:
|
|
|
107
|
Wed Apr 10 00:40:30 2013 |
Zach | Optics | Configuration | fauxMC locked | [Koji, Zach]
|
|
|
113
|
Tue Apr 16 09:43:58 2013 |
Koji | Optics | Configuration | Mirror list for L1OMC | L1 OMC
Cavity Mirrors
FM1 (input coupler): A8 |
|
|
135
|
Mon Jun 3 18:58:08 2013 |
Koji | Optics | Configuration | OMC final tests | - QPD mount aligned, QPD output checked
The spots are with 100um from
the center of the diodes. [ELOG |
|
|
151
|
Fri Aug 16 15:31:17 2013 |
Koji | Optics | Configuration | Mirror list for OMC(002) | OMC(002)
Cavity Mirrors
FM1 (input coupler): A9 |
|
|
156
|
Thu Aug 22 15:40:15 2013 |
Koji | Electronics | Configuration | PZT endurance test | [Koji, Jeff]
Background
In response to the failure of one |
|
|
157
|
Fri Aug 23 19:24:32 2013 |
Koji | Electronics | Configuration | PZT endurance test (II) | The
PZT tests were finished with the conclusion
that the PZT won't be damaged with our expected |
|
|
261
|
Fri Jun 10 17:12:57 2016 |
Koji | General | Configuration | L1 OMC DCPD replacement | New DCPD(T) = A1-23
DCPD(T) = DCPDB: extracted and accomodated
in CAGE-G SLOT1 |
|
|
263
|
Fri Aug 12 14:58:17 2016 |
Koji | General | Configuration | H1 OMC DCPD replacement | Preparation of 3rd OMC for the
use in H1
New DCPD(T) = B1-01 |
|
|
277
|
Tue May 16 19:05:18 2017 |
Koji | Optics | Configuration | OMC SN002 fix - temporary optics | Working on the SN002 OMC fix. Checked the
inventory. I think I am using C8 mirror as
the new temporary CM1 and PZT24 as the new |
|
|
278
|
Fri May 26 21:53:20 2017 |
Koji | General | Configuration | Trans RF PD setup | Recent work
- DC output of the trans RF PD
was connected to the BNC patch panel. => |
|
|
279
|
Tue Jun 6 00:49:48 2017 |
Koji | General | Configuration | Trans RF PD setup | Last week, I further worked on the RF system
to install 20dB coupler on the agilent unit
and setup the R channel. This allowed me |
|
|
280
|
Tue Jun 6 22:00:36 2017 |
Koji | General | Configuration | Trans RF PD setup | - Replaced the PZT with the one used from
the beginning. This must be PZT #21. After
the replacement, the spot positions look |
|
|
328
|
Thu Apr 11 12:15:31 2019 |
Koji | Mechanics | Configuration | PZT sub assy mirror orientations | |
|
|
338
|
Tue Apr 16 16:35:09 2019 |
Koji | Optics | Configuration | OMC(004): Glass breadboard selection | D1200105 SN006 was selected as
the breadboard for OMC(004).
The reason is the best parallelism |
|
|
339
|
Tue Apr 16 16:40:26 2019 |
Koji | General | Configuration | OMC(004): A Mirror selection | We are going to use A5 and A14
for FM1 and FM2. (The role of these
two can be swapped) |
|
|
340
|
Tue Apr 16 16:52:36 2019 |
Koji | Optics | Configuration | OMC(004): B Mirror selection | We are going to use B6 for the
DCPD BS (BS2), and B1 for the QPD BS (BS3).
Their role can not |
|
|
341
|
Tue Apr 16 17:24:56 2019 |
Koji | Optics | Configuration | OMC(004): E Mirror selection | We are going to use E6, E9, E11, and E14
for BS1, SM1, SM2, and SM3. They (and E18)
are all very similar. |
|
|
353
|
Tue Apr 23 10:21:12 2019 |
Joe | Optics | Configuration | Moving the spots to the centre of the curved mirrors | [Koji,Philip, Liyuan, Joe]
CM1:
We moved the curved mirrors to |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
1
|
Fri Jun 15 15:45:49 2012 |
Koji | General | General | OMC Plan | LIGO Document G1200683-v1:
aLIGO OMC fabrication and testing |
|
|
2
|
Sat Jun 16 08:53:09 2012 |
Koji | General | General | To Do List | Facility
Work
|
|
|
3
|
Wed Jun 20 00:10:53 2012 |
Koji | Facility | General | Hole on the wall was patched | |
|
|
7
|
Sat Jul 14 02:16:07 2012 |
Koji | General | General | Plan Update: July | Facility/Supplies
Work in progress |
|
|
10
|
Mon Jul 23 17:15:14 2012 |
Koji | Clean | General | Talking with Margot | I consulted with Margot about the cleaning
of the optics
Optics are considered |
|