| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
451
|
Mon Nov 7 21:16:16 2022 |
Camille | Optics | Configuration | Setting up the fiber couplers | [Camille, Koji]
Began setting up fiber assembly
for OMC testing: |
|
|
452
|
Mon Nov 7 22:00:33 2022 |
Koji | Optics | Configuration | Setting up the fiber couplers | Fiber matching: 43.2/56.7 = 76%
S/P-pol ratio 0.7/43.2 = 1.6%
|
|
|
463
|
Tue Nov 29 15:54:47 2022 |
Koji | General | Configuration | Windows laptop for WincamD Beam'R2 recovery | Aaron took the set to Cryo lab
|
|
|
476
|
Thu Jan 26 23:16:35 2023 |
Koji | Optics | Configuration | OMC #4: Top side bonding. | [Camille, Koji]
|
|
|
6
|
Fri Jun 29 11:26:04 2012 |
Zach | Optics | Characterization | RoC measurement setup | Here is the proposed RoC measurement
setup. Koji tells me that this is referred
to as "Anderson's method". |
|
|
8
|
Wed Jul 18 23:20:13 2012 |
Koji | Optics | Characterization | Mode scan results of ELIGO | Nic Smith sent me a bunch of elog lists
where the results of the mode scan can be
found. |
|
|
9
|
Sun Jul 22 15:56:53 2012 |
Zach | Optics | Characterization | RoC measurement setup | Here is a more detailed version of
the setup, so that we can gather the parts
we will need. |
|
|
31
|
Thu Oct 18 20:23:33 2012 |
Koji | Optics | Characterization | Improved measurement | Significant
improvement has been achieved in the RoC |
|
|
32
|
Wed Nov 7 01:28:20 2012 |
Koji | Optics | Characterization | Wedge angle test (A1) | Wedge
angle test
Result: Wedge angle of Prism A1: |
|
|
35
|
Thu Nov 8 13:24:53 2012 |
Koji | Optics | Characterization | More wedge measurement | A1
Horiz Wedge 0.497
+/- 0.004 deg |
|
|
39
|
Fri Nov 9 00:43:32 2012 |
Koji | Optics | Characterization | Further more wedge measurement | Now it's enough for the first OMC (or even
second one too).
Today's measurements all distributed |
|
|
40
|
Sat Nov 17 02:31:34 2012 |
Koji | Optics | Characterization | Mirror T test | Mirror T test
The mirror was misaligned to have
~2deg incident (mistakenly...) angle. |
|
|
41
|
Mon Nov 19 13:33:14 2012 |
Koji | Optics | Characterization | Resuming testing mirror RoCs | In order to resume testing the curvatures
of the mirrors, the same mirror as the previous
one was tested. |
|
|
42
|
Mon Nov 26 01:40:00 2012 |
Koji | Optics | Characterization | More RoC measurement | C1: RoC: 2.57845 +/− 4.2e−05m
|
|
|
44
|
Tue Dec 18 20:04:40 2012 |
Koji | Optics | Characterization | Prism Thickness Measurement | The thicknesses of the prism mirrors (A1-A5)
were measured with micrometer thickness gauge.
Since the thickness of the thinner |
|
|
49
|
Mon Dec 31 03:11:45 2012 |
Koji | Optics | Characterization | Further more RoC measurement | Total (excluding C2, C7, C8): 2.575 +/-
0.005 [m]
New results |
|
|
50
|
Wed Jan 2 07:35:55 2013 |
Koji | Optics | Characterization | Thickness of a curved mirror | Measured the thickness of a curved mirror:
Took three points separated by 120
degree. |
|
|
51
|
Wed Jan 2 07:45:39 2013 |
Koji | Optics | Characterization | First Contact test | Conclusion:
Good. First contact did not damage the coating
surface, and reduced the loss |
|
|
53
|
Thu Jan 10 18:37:50 2013 |
Koji | Optics | Characterization | Wedging of the PZTs | Yesterday I measured the thickness of the
PZTs in order to get an idea how much the
PZTs are wedged. |
|
|
54
|
Wed Jan 16 14:10:50 2013 |
Koji | Optics | Characterization | Autocollimator tests of optics perpendicularity/parallelism | The
items:
- Autocollimator (AC) borrowed from |
|
|
56
|
Sat Jan 19 20:47:41 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator | The wedge angle of the prism "A1"
was measured with the autocollimator (AC).
The range of the AC is 40 arcmin. |
|
|
59
|
Mon Feb 4 00:39:08 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator and the rotation stage | Method:
Mount the tombstone prism
on the prism mount. The mount is fixed on |
|
|
60
|
Wed Feb 6 02:34:10 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator and the rotation stage | Measurement:
A6: α
= 0.665 deg, β = +3.0 arcmin (1.5 div |
|
|
62
|
Thu Feb 7 23:01:45 2013 |
Koji | Optics | Characterization | UV epoxy gluing test | [Jeff, Yuta, Koji]
Gluing test with UV-cure epoxy
Optocast 3553-LV-UTF-HM |
|
|
66
|
Fri Mar 1 23:52:18 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator and the rotation stage | Measurement:
E1: α =
0.672 deg, β = +0.0 arcmin (0 div up)
|
|
|
67
|
Tue Mar 5 19:37:00 2013 |
Zach | Optics | Characterization | eLIGO OMC visibility vs. power measurement details | EDIT (ZK): Koji points out that (1 -
Ti) should really be the non-resonant reflectivity
of the aligned cavity, which is much closer |
|
|
68
|
Wed Mar 6 23:24:58 2013 |
Zach | Optics | Characterization | eLIGO OMC visibility vs. power measurement details | I found that, in fact, I had lowered
the modulation depth since when I measured
it to be 0.45 rads --> Psb = 0.1. |
|
|
72
|
Fri Mar 15 02:15:45 2013 |
Koji | Electronics | Characterization | Diode testing | Diode testing
o Purpose of the measurement
- Test Si QPDs (C30845EH) for ISC |
|
|
73
|
Sun Mar 17 21:59:47 2013 |
Koji | Electronics | Characterization | Diode testing ~ DCPD | - For the dark noise measurement, the lid
of the die-cast case should also contact
to the box for better shielding. This made |
|
|
74
|
Wed Mar 20 09:38:02 2013 |
Zach | Optics | Characterization | [LLO] OMC test bench modified | For various reasons, I had to switch
NPROs (from the LightWave 126 to the Innolight
Prometheus). |
|
|
78
|
Sat Mar 23 16:36:15 2013 |
Koji | Electronics | Characterization | Diode QE measurement | Quantum efficiencies of the C30665GH
diodes were measured.
- The diode was biased by the FEMTO |
|
|
92
|
Wed Apr 3 17:39:38 2013 |
Koji | Mechanics | Characterization | Calibration of the test PZTs before the glue test | We want to make sure the responses of the
PZT actuator does not change after the EP30-2
gluing. |
|
|
95
|
Thu Apr 4 01:35:04 2013 |
Koji | Optics | Characterization | Mode matching to the OMC cavity | The fiber output was matched with the lenses
on a small bread board.
The detailed configuration is found |
|
|
96
|
Thu Apr 4 01:43:06 2013 |
Koji | Optics | Characterization | Mirror T measurement | [Zach, Koji]
The measurement setup for the transmission
measurement has been made at the output of |
|
|
98
|
Fri Apr 5 14:39:26 2013 |
Koji | Mechanics | Characterization | Calibration of the test PZTs after the heat cure | We attached fused silica windows on the
test PZTs. http://nodus.ligo.caltech.edu:8080/OMC_Lab/93
The glued assemblies were brought |
|