| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
400
|
Wed Aug 9 15:57:28 2017 |
Zach | Electronics | Modeling | Triangular Geometry | 2017-08-09
I compared
the triangular geometry to the original geometry
and the excitation was only improved |
|
|
402
|
Thu Aug 10 10:47:54 2017 |
Zach | Electronics | Modeling | Geometry Ratios | 2017-08-10
The attached
plots compare the new and old geometries
with .5 mm and 1 mm sample gaps. They are |
|
|
407
|
Tue Aug 15 00:09:01 2017 |
Zach | Electronics | Modeling | ESD Improvements | 2017-08-14
I did my
best to increase the excitation in the higher
order modes. By making the ESD narrower (a |
10x |
|
411
|
Wed Aug 16 10:04:24 2017 |
Zach | Electronics | Modeling | ESD along edge | 2017-08-16
I placed
created a very narrow ESD placed along the
edge of the sample. The thought behind this |
|
|
412
|
Wed Aug 16 11:36:13 2017 |
Zach | Electronics | Modeling | Middle ESD | 2017-08-16
I created
a model with a drive offset in the middle.
It improved one of the modes by a factor |
|
|
414
|
Wed Aug 16 16:05:09 2017 |
Zach | Electronics | Modeling | Two ESD First test | 2017-08-16
I created
a model with two ESD's, essentially a
combination of my previous two attempts with |
|
|
415
|
Thu Aug 17 14:19:04 2017 |
Zach | Electronics | Modeling | Two ESD Optimization | 2017-08-17
I ran a
sweep of the position of the middle ESD to
determine the optimal arrangement. From the |
17x |
|
416
|
Thu Aug 17 23:34:51 2017 |
Zach | Electronics | Modeling | Optimized ESD Drawing | 2017-08-17
I made a
drawing of the Optimal ESD design. The bottom
combs (right hand in the rotated image) are |
|
|
417
|
Fri Aug 18 10:50:53 2017 |
Zach | Electronics | Modeling | ESD's with positive voltage | 2017-08-18
With both
electrodes driven at a positive voltage,
the results are still an improvement over |
|
|
419
|
Fri Aug 18 14:15:47 2017 |
Zach | Electronics | Modeling | Same Voltage ESD Sweep | 2017-08-18
I ran a
sweep of the central position in the two
ESD setup with both set at the same voltage. |
|
|
420
|
Fri Aug 18 15:10:23 2017 |
Zach, Gabriele | Electronics | Modeling | ESD prototype | 2017-08-18
We created
a prototype of PCB for the ESD design. Unfortunately
the orientation of the two combs was flipped, |
|
|
421
|
Wed Aug 23 14:11:13 2017 |
Zach, Gabriele | Electronics | Measurements | Installing ESD Prototype | 2017-08-23
Installed
ESD Prototype design by taping it to the
older design, we then lowered the mount until |
|
|
401
|
Wed Aug 9 17:07:57 2017 |
Zachary | Electronics | Modeling | Optimization Summary | 2017-08-09
p.p1 {margin: 0.0px 0.0px
0.0px 0.0px; font: 11.0px 'Helvetica Neue'; |
6x |
|
689
|
Mon May 13 18:37:47 2019 |
aaron | Clean | General | Clean room gear | Mon May 13 18:37:37 2019
Entered CRIME lab to borrow 4x
hair nets and face masks. Can you |
|
|
696
|
Mon May 20 10:35:45 2019 |
aaron | Clean | General | Clean room gear | Aaron,
There is a buy list of approved
clean room supplies posted here https://dcc.ligo.org/LIGO-E1300399. |
|
|
702
|
Fri May 24 15:08:19 2019 |
alena | General | Measurements | S1600713 S1600714 S1600715 S1600716 | 2019-05-24
15:00 in
chamber
S1600713 in CR1
S1600714
in CR2
S1600715in CR3
S1600716 |
|
|
40
|
Thu Jul 14 15:30:48 2016 |
ericq | Electronics | Configuration | Cymac RTS configuration | We played around a bit with the cymac,
in efforts to make things better.
We disabled some more fancy-sounding |
|
|
173
|
Thu Nov 10 14:13:34 2016 |
gabriele | Electronics | Configuration | MATLAB code to control Thorlabs stages | To be used to automate the laser polishing. |
|
|
1
|
Wed Jul 11 23:01:01 2012 |
janosch | Optics | Characterization | starting the multi-color scatter experiment | Steve Maloney, a visiting highschool teacher,
and I have started to set up a new scattering
experiment in the Richter lab. The idea is |
|
|
2
|
Fri Jul 13 10:34:35 2012 |
janosch | Optics | Characterization | camera image | We were confused a bit about how the camera
image changes when you move the arm that
holds the camera and lens around the |
|
|
3
|
Fri Jul 13 20:53:35 2012 |
janosch | Optics | Characterization | two images | The following two pictures were taken from
the same angle with green (left) and red
(right) incident laser at an angle of 15deg |
|
|
4
|
Tue Jul 17 18:32:11 2012 |
janosch | Optics | Characterization | purple images | We have the new 405nm laser pointer.
The image to the left shows the scattered
light from the red laser, the image to the |
|
|
5
|
Wed Jul 18 18:43:34 2012 |
janosch | Optics | Characterization | gone with the wind | Here a little purple video. It starts with
scattering angle around 15deg and stops at
about 80deg. |
|
|
6
|
Fri Jul 20 18:35:42 2012 |
janosch | Optics | Characterization | purple improvements and first uncalibrated BSDF curves | Today we improved alignment of the lens-camera
arm. We discovered earlier that this alignment
affects the amount of "snowfall" |
|
|
7
|
Tue Jul 24 10:59:59 2012 |
janosch | Optics | Characterization | sum of purple and red | We played around with Matlab today. The
first step was to convert light wavelengths
into RGB colors. In this way we can combine |
|
|
8
|
Fri Oct 12 16:23:20 2012 |
janosch | Optics | Daily Progress | reassembled setup | Nothing has happened since Steve, the visiting
highschool teacher, has left. Meanwhile,
some parts of the multi-color BRDF setup |
|
|
12
|
Sun May 8 13:35:04 2016 |
rana | Electronics | Design | Design of optical lever electronics | Koji, Rich, and I recently came up with
a new QPD design which is better for general
lab use than the aLIGO ones (which have a |
|
|
131
|
Wed Sep 28 10:26:58 2016 |
rana | General | General | references on ideal glasses | Some easy to read reviews on
thin films and ideal glass for people getting
started in this Q measuring game.
|
|
|
244
|
Sat Dec 17 06:29:15 2016 |
rana | Electronics | Configuration | Timing issue: is it a DAC issue? | I find sometimes that the probe configuration
can give these distorted signals. For the
Tektronix probes, its best to use a 500 MHz |
|
|
137
|
Wed Oct 19 16:40:24 2016 |
sults: | General | Measurements | S1600349 | S1600439, not annealed, as received
from Mark Optics
Installation
installed
and balanced, pump down started at 4:38pm |
10x |