| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
160
|
Thu Aug 29 18:55:36 2013 |
Koji | Mechanics | General | I1 OMC top side gluing (UV) | The glass components for the I1 OMC top
side were glued by the UV glue.
Breadboard SN#4 |
|
|
202
|
Tue Jul 8 18:54:54 2014 |
Koji | Mechanics | Characterization | PZT characterization | Each PZT was swept with 0-150V 11Hz triangular
wave.
Time series data for 0.2sec was recorded |
|
|
210
|
Thu Jul 17 02:19:20 2014 |
Koji | Mechanics | Characterization | I1OMC vibration test | Summary
- The breadboard has a resonance
at 1.2kHz. The resonant freq may be chagned |
6x |
|
211
|
Sun Jul 20 17:19:50 2014 |
Koji | Mechanics | Characterization | I1OMC vibration test ~ 2nd round | Improved
vibration measurement of the OMC
Improvement |
9x |
|
213
|
Mon Jul 21 01:02:43 2014 |
Koji | Mechanics | Characterization | Some structual mode analysis | Prisms
Fundamental: 12.3kHz Secondary: 16.9kHz
|
6x |
|
218
|
Tue Sep 9 20:59:19 2014 |
Koji | Mechanics | Characterization | Structural mode analysis for the PZT mirror | Structural analysis of the PZT mirror with
COMSOL.
Inline figures: Eigenmodes |
6x |
|
296
|
Wed May 30 16:40:38 2018 |
Koji | Mechanics | Characterization | EOM mount stability test | https://awiki.ligo-wa.caltech.edu/wiki/EOM_Mount_Stability |
|
|
314
|
Fri Feb 1 12:52:12 2019 |
Koji | Mechanics | General | PZT deformation simulation | A simple COMSOL simulation was run to see
how the PZT deforms as the voltage applied.
Use the geometry of the ring PZT |
|
|
320
|
Thu Mar 28 16:36:52 2019 |
Koji | Mechanics | Characterization | OMC(002) PZT characterization | As
performed in the ELOG 202, the PZTs of
the OMC 002 were tested. |
|
|
328
|
Thu Apr 11 12:15:31 2019 |
Koji | Mechanics | Configuration | PZT sub assy mirror orientations | |
|
|
329
|
Thu Apr 11 21:22:26 2019 |
Koji | Mechanics | General | OMC(004): PZT sub-assembly gluing | [Koji Stephen]
The four PZT sub-assemblies were
glued in the gluing fixtures. There were |
|
|
358
|
Thu May 9 16:07:18 2019 |
Stephen | Mechanics | General | Improvements to OMC Bonding Fixture | [Stephen, Koji]
As mentioned in eLOG
331, either increased thermal cycling |
|
|
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 |
|
|
478
|
Sat Jan 28 00:38:56 2023 |
Koji | Mechanics | General | OMC #1 cable bracket replacement / OMC #1 repair completed | The AL metal bracket was replaced with
a PEEK version.
Attachments 1/2: Before the replacement. |
|
|
479
|
Sat Jan 28 00:46:21 2023 |
Koji | Mechanics | General | OMC #4: Replaced the locks of the transport fixture | Yesterday, we noticed that we could not
close the transport fixture for OMC #4. We
could not fully rotate the knobs of the locks. |
|
|
480
|
Wed Feb 1 01:33:03 2023 |
Koji | Mechanics | General | 5th OMC Transport Fixture | The transport fixture was brought to the
40m clean room to use as an assembly reference. |
|
|
481
|
Wed Feb 1 01:39:41 2023 |
Koji | Mechanics | General | DCPD housing / QPD housing | Inserted 4-40 and 2-56 helicoils into the
DCPD/QPD housings for the 4th OMC. The retainer
caps were also fastened to the housings. |
|
|
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 |
|
|
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. |
|
|
22
|
Fri Oct 5 03:39:58 2012 |
Koji | Optics | General | RoC Test setup | Based on Zach's experiment design, I wrote
up a bit more detailed optical layout for
the mirror test. |
|
|
23
|
Mon Oct 8 11:30:47 2012 |
Koji | Optics | General | EG&G 2mm photodiode angle response | EGE&G 2mm photodiode angle response
measured by Sam T1100564-v1 |
|
|
24
|
Tue Oct 9 04:59:24 2012 |
Koji | Optics | General | OMC Test Optical Setup | |
|
|
26
|
Fri Oct 12 17:15:19 2012 |
Koji | Optics | General | Loan from the 40m / ATF |
HWP set
|
|
|
30
|
Wed Oct 17 20:36:04 2012 |
Koji | Optics | General | RoC test cavity locked | The RoC test setup has been built on
the optical table at ATF.
|
|
|
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 |
|
|
37
|
Thu Nov 8 19:52:57 2012 |
Koji | Optics | General | How to apply UV epoxy | KA's question:
Do |
|
|
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)
|
|
|
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
|
|
|
43
|
Thu Nov 29 21:18:23 2012 |
Koji | Optics | General | OMC Mounting Prisms have come | |
|
|
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 |
|
|
48
|
Mon Dec 31 03:10:09 2012 |
Koji | Optics | General | SolidWorks model of the OMC breadboard | |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
63
|
Thu Feb 21 18:44:18 2013 |
Koji | Optics | Configuration | Perpendicularity test | Perpendicularity test of the mounting
prisms:
The perpendicularity of the prism |
|