| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
388
|
Wed Aug 2 13:47:47 2017 |
Zach | Electronics | Modeling | Arm width Sweep | 2017-08-02
I ran a
sweep of the width of the ESD arms. There
appears to be a linear relationship across |
|
|
389
|
Wed Aug 2 15:40:00 2017 |
Zach | Electronics | Modeling | Parameter diagram | I am posting a diagram of the geometric
parameters that I swept. The only one not
included is the vertical space between the |
|
|
394
|
Mon Aug 7 13:19:48 2017 |
Zach | Electronics | Modeling | Normalized data | 2017-08-07
I included
the modal mass factors in the code and renormalized
my data. The normalization has a noticeable |
|
|
398
|
Tue Aug 8 16:20:24 2017 |
Zach | Electronics | Modeling | Rotated ESD | 2017-08-08
I rotated
the ESD and calculated it's modal projections
by rotating the data array that MATLAB extracts |
|
|
399
|
Wed Aug 9 12:10:47 2017 |
Zach | Electronics | Modeling | Preliminary improvement from ESD optimization | 2017-08-09
I created
a plot of the ratio of the force in the optimized
design to the force in the original design. |
|
|
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 |
|
|
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 |
|
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 |
|
409
|
Tue Aug 15 16:43:58 2017 |
Zach | Electronics | Modeling | Unchanged Mode Insight | 2017-08-15
It appears
to me that the major factor limiting the
improvement of the modes that either remain |
|
|
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 |
|
|
456
|
Tue Jan 30 15:56:36 2018 |
Gabriele, Craig | Electronics | Configuration | Temporary data acqusition for PSL lab beat note and accelerometers | We set up the model x3tst to acquire at
65kHz four signals coming from the PSL lab:
X3:TST-BEAT_OUT_DQ: beat |
|
|
9
|
Mon May 2 11:46:45 2016 |
Gabriele | Facility | Daily Progress | Table and vacuum chambers in the lab | Elogs for the new Coatin
RIng-down
MEasurement |
|
|
10
|
Tue May 3 11:57:47 2016 |
Gabriele | Facility | Daily Progress | Table and vacuum chambers in the lab | We discovered a couple of days ago that
the table was sitting on three legs only
and the fourth one was dangling. I managed |
|
|
21
|
Tue Jun 7 14:07:55 2016 |
Gabriele | Facility | General | Rack and workstation | I moved the unused rack from the Crackling
Noise lab to the C.Ri.Me lab. It will be
used for the new cymac. I also started putting |
|
|
31
|
Thu Jul 7 17:44:11 2016 |
Gabriele | Facility | Daily Progress | Vacuum chamber tests | [Alena, Gabriele]
This afternoon we opened the tall
belljar vacuum chamber, and took everything |
|
|
33
|
Fri Jul 8 15:26:37 2016 |
Alena | Facility | Daily Progress | Vacuum chamber tests | Fixed the 307 gauge controller (a missing
contact on the rair panel). The low pressure
gauge was connected to 1G port and has measured |
|
|
36
|
Mon Jul 11 14:56:45 2016 |
Alena | Facility | Daily Progress | Vacuum chamber tests | Installed a gate valve between the roughing
and tubbo pump. See below a pump down curve.
The convection gauge is not calibrated. the |
|
|
38
|
Mon Jul 11 17:04:06 2016 |
Alena | Facility | Daily Progress | Vacuum chamber tests | At 5pm the pressure was 6.5e-6 torr.
Checked again at:
9am, pressure was 2e-6 |
|
|
41
|
Thu Jul 14 16:56:00 2016 |
Alena | Facility | Daily Progress | test vacuum system | Please see prosidures for pumping down
and venting with air for the test vacuum
chamber here |
|
|
45
|
Sat Jul 16 14:15:44 2016 |
Gabriele | Facility | Daily Progress | Pump down started | Following Alena's
procedure, at about 1:30pm LT I started
the chamber pump down. At 14:15pm LT the |
|
|
46
|
Mon Jul 18 13:39:45 2016 |
Gabriele | Facility | Daily Progress | Pump down started | Today at 1:40pm pressure is 8.5e-7 Torr
|
|
|
52
|
Tue Jul 19 17:15:37 2016 |
Gabriele | Facility | Daily Progress | Vacuum pressure acquired | [Alena, Gabriele]
We connected the analog output
of the vacuum gauge controller to one of |
|
|
65
|
Wed Jul 27 11:27:11 2016 |
Gabriele | Facility | General | Pumps stopped and venting | 11:25am LT: closed valve between roughing
and turbo pumps, switched off both pumps.
Turbo pump is slowing down |
|
|
66
|
Wed Jul 27 15:43:02 2016 |
Gabriele | Facility | Daily Progress | Vacuum chamber dismantled and ready for cleaning | [Alena, Gabriele]
As decided at out Red Door meeting,
we're going to clean the vacuum chamber |
|
|
81
|
Sat Aug 13 11:17:17 2016 |
Gabriele | Facility | Daily Progress | Spot the differences | |
|
|
90
|
Fri Aug 19 13:46:55 2016 |
Alena, Calum, Jon, Liz, Steve, Gabriele | Facility | Daily Progress | Clean room and vacuum complete | This morning we installed the clean room
curtains and washed them. It turns out that
the air filters are supposed to be powered |
|
|
113
|
Thu Sep 15 11:23:13 2016 |
Gabriele | Facility | General | Chamber open | Turbo pump off and spinning down at 9:37am
LT. Pumo completely stopped at 11:15am LT
Openend the chamber and removed |
|
|
126
|
Mon Sep 26 15:54:01 2016 |
Gabriele | Facility | Configuration | Moved vacuum controllers | I moved the turbo pump controller out of
the clean room. Also, I installed the gauge
controller on the Cymac rack. |
|
|
216
|
Tue Nov 29 17:02:06 2016 |
Gabriele | Facility | Noise hunting | Suspending the roughing pump | I suspended the roughing pump with four
springs. The reduction of the 58 Hz peak
is similar to what I got when the pump was |
|
|
265
|
Thu Jan 19 12:49:17 2017 |
Gabriele | Facility | Vacuum | Skyhook installed | The SkyHook has been put in place and bolted
down to the floor.
|
|
|
430
|
Thu Sep 14 15:59:10 2017 |
Gabriele | Facility | | All wrapped up for Saturday plumbing work | |
|
|
26
|
Wed Jun 29 16:44:17 2016 |
Gabriele | General | Configuration | First disk eigenfrequency | The following table shows the lowest eigenfrequency
(Hz) for different sizes of disks
|
|
|
37
|
Mon Jul 11 15:21:12 2016 |
Gabriele | General | Daily Progress | One disk installed into the chamber | [Alena, Gabriele]
We attached one of the silicon
lenses to a 1" optical post using some |
|
|
44
|
Fri Jul 15 17:56:50 2016 |
Gabriele | General | Daily Progress | QPD connected to digital system | I connected the QPD to the ADC interface
with a temporary cable running on the floor.
I could get signals. I still have |
|
|
48
|
Mon Jul 18 14:29:07 2016 |
Gabriele | General | Daily Progress | Status of the test setup | I checked that the QPD electronics works
as expected, and that I can acquire the signals
using the ADCs. A new model (x3cr1) is up |
|
|
49
|
Mon Jul 18 17:46:04 2016 |
Gabriele | General | Daily Progress | First look at QPD signals | Here's the first spectrum of the QPD
X and Y signals, acquired with the digital
system. Roughing and turbo pumps are still |
|
|
53
|
Tue Jul 19 17:21:48 2016 |
Gabriele | General | Daily Progress | First modes excited! | We can't generate any arbitary signal
with the real time model, since awg is not
working properly yet. For the moment being |
|
|
56
|
Thu Jul 21 12:10:14 2016 |
Gabriele | General | Daily Progress | Glitch hunting | Yesterday I could clearly see the glitches
as jumps in the time domain plot of X and
Y signals, and trace them to somewhat harder |
|
|
68
|
Thu Jul 28 14:01:27 2016 |
Alena | General | Daily Progress | Clean room | Ordered the clean room (hardware+hepa filters)
and vacuum gauges |
|
|
70
|
Fri Jul 29 14:08:31 2016 |
Gabriele | General | Daily Progress | Peak tracking code for real time model | Summary
I wrote a C function
to reconstruct the amlplitude and frequency
of a line. It can be added as a block into |
|
|
74
|
Mon Aug 8 10:42:46 2016 |
Gabriele | General | General | Dependency of eigenmode frequencies on thickness and diameter | I ran a set of COMSOL simulations to determine
the dependency of the frequency of each eigenmode
on the disk thickness and diameter, within |
26x |