| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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117
|
Sat Jan 7 16:07:13 2023 |
| General | General | | The bond quality measurements can be split
into two categories: destructive and nondestructive.
For destructive, we have measuring tensile |
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11
|
Fri Apr 23 10:41:22 2021 |
Aidan | General | Design specs | 2 um photodiode requirements | MCT HgCdTe requirements: https://docs.google.com/spreadsheets/d/1lajp17yusbkacHEMSobChKepiqKYesHWIJ6L7fgr-yY/edit?usp=sharing
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35
|
Fri Oct 1 13:24:40 2021 |
Aidan | General | Design specs | TM Barrel coating emissivity | I have to question whether this passes
a sanity test. Surely in the case of Stack
2, the 10um thick Ta2O5 will absorb the majority |
|
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112
|
Wed Oct 26 21:27:23 2022 |
Jennifer | General | Optical Contacting | PWM 3.1 (more) very slow heating | [I'm (once again) behind on data processing,
but I'm creating an entry on the day
I actually run the tests] |
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62
|
Mon Jul 11 16:24:31 2022 |
Jennifer Hritz | General | Optical Contacting | Baselining the temperature output of the Oster hot plate | This was performed last Friday (7/8).
I secured a thermocouple perpendicular
against the hotplate and recorded the |
|
|
63
|
Mon Jul 11 17:27:39 2022 |
Jennifer Hritz | General | Optical Contacting | First successful bond | Note that the slides have "GLOBE"
printed on one side. I always bond the opposite
using the opposite side without the text. |
|
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66
|
Thu Jul 14 14:55:01 2022 |
Jennifer Hritz | General | Optical Contacting | Testing isopropanol and methanol | Note that I am just testing out different
techniques, so I have not set up the thermocouples
to precisely measure the temperatue. |
|
|
71
|
Wed Jul 27 14:50:20 2022 |
Jennifer Hritz | General | Optical Contacting | Bonding without liquids and narrowing down heating issue | I have found that, after cleaning the glass
with methanol (or even sometimes with just a dry
lense-cleaning cloth), I can get glass slides to |
|
|
73
|
Thu Aug 4 13:44:56 2022 |
Jennifer Hritz | General | Optical Contacting | Success with slowly heating | Yesterday, I did two rounds of slowly heating
4 samples to the maximum hot plate temperature.
This was to formally test if my success |
|
|
77
|
Tue Aug 16 19:54:29 2022 |
Jennifer Hritz | General | Optical Contacting | Razor blade test | We succeeded in setting up an apparatus
for quantifiying the razor blade test. After
mounting the glass slides such that |
|
|
82
|
Tue Sep 27 22:29:34 2022 |
Jennifer Hritz | General | Optical Contacting | Razor test apparatus disassembly pictures | Pictures of the razor test apparatus before
and after disassembly, to make future reassembly
easier. |
|
|
83
|
Wed Sep 28 22:11:31 2022 |
Jennifer Hritz | General | Optical Contacting | Looked at Thor Lab slides | While finalizing my work plan for the quarter,
I decided to look at the Thor Lab slides.
This was instructive because they highlighted |
|
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84
|
Thu Sep 29 18:36:40 2022 |
Jennifer Hritz | General | Optical Contacting | Looked at Thor Lab slides (continued) | Continuining with my casual exploration
of the Thor Lab slides, I heated them from
off --> low --> med --> high, with |
|
|
86
|
Fri Sep 30 21:51:31 2022 |
Jennifer Hritz | General | Optical Contacting | Quick test heat and pressure test | Given that these glass slides are much
thinner than the ones I worked with prior,
I suspected they would be more receptive |
|
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87
|
Sat Oct 1 23:00:03 2022 |
Jennifer Hritz | General | Optical Contacting | (RESULTS!) Quick test heat and pressure test | These are the results from the previous
log.
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|
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88
|
Sun Oct 2 23:23:07 2022 |
Jennifer Hritz | General | Optical Contacting | Cause of improved bond: time or pressure | Before jumping to conclusions based on
my previous results, I wanted to check that
it was indeed heat and pressure, not time, |
|
|
89
|
Mon Oct 3 23:32:30 2022 |
Jennifer Hritz | General | Optical Contacting | Cause of improved bond: time or pressure (Update) | I was unable to check the samples because
I could not get access to Bridge, so they
will be checked tomorrow and the results |
|
|
90
|
Tue Oct 4 22:15:23 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM Test #1 | I wrote a program to control the heating
rate of the hot plate using Pulse Width Modulation
(PWM), and it was a great success! |
|
|
91
|
Wed Oct 5 23:24:08 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM Test #2 | I repeated the first test, but let the
hot plate run longer. It revealed that the
linearity for the lower temperatures completely |
|
|
92
|
Fri Oct 7 00:21:24 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM Test #3 | The previous test was cycled with 0.3s
on follwed by 0.7s off*. This test was 0.7s
on followed by 0.3s off. I intended to let |
|
|
93
|
Fri Oct 7 21:20:08 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2 progress | I had a little set back regarding the non-linear
portion of the heating. After about 150°C,
if the heating rate is kept constant, the |
|
|
94
|
Sat Oct 8 23:22:25 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2 test #1 | I had some trouble with the code not working
as intended (partially because it has been
I while since I coded in C++). |
|
|
95
|
Sun Oct 9 21:55:53 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2 test #1 & 2 | For the following two graphs, I ram
four tests: two using the the v1 of the PWM
code and two using v2 of the PWM code. The |
|
|
96
|
Mon Oct 10 15:34:13 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2.1,2,3 Test #1 and v2.3 Test #2 | Before trying the PWM on actual samples,
I wanted to make one final attempt at improving
my code (labled as v2.1). This change |
|
|
97
|
Tue Oct 11 23:59:07 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2.3 Test #1 and 2 | Here are the graphed results from
yesterday's tests, both by themselves
and overlayed with the previous tests. I |
|
|
98
|
Wed Oct 12 23:26:48 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2.3 Test #3 | I tried increasing the temperature by 180°C
over 20 minutes. As suspected, it did not
quite reach the target temperature because |
|
|
99
|
Thu Oct 13 20:56:48 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2.4,5 Test #3 | My two corrections ended up being huge
overshoots. The drop off time (100°C)
is correct, but the default rate increase |
|
|
100
|
Fri Oct 14 21:36:52 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2.6 Test #3 | The goal of "v2.X test #3" is
to heat the hot plate to 200°C over the
course of 20 minutes, and with v2.6, I have |
|
|
101
|
Sat Oct 15 21:59:13 2022 |
Jennifer Hritz | General | Optical Contacting | Hot plate PWM v2.6 Test #1, 2, 3 | I realized that, after changing so much
from v2.3 to 6, I should check that my first
two tests produce correct results with the |
|
|
102
|
Sun Oct 16 14:20:32 2022 |
Jennifer Hritz | General | Optical Contacting | Samples after 2 weeks under pressure | Since I was focusing on the hot plate code
and therefore did not need my weights, I
decided to leave them on top of my samples |
|
|
103
|
Mon Oct 17 23:17:25 2022 |
Jennifer Hritz | General | Optical Contacting | Testing PWM code with actual samples | Now that I have (relatively) good PWM code,
I wanted to do my first real test with actual
samples. Since everything went smoothly, |
|
|
104
|
Tue Oct 18 19:33:38 2022 |
Jennifer Hritz | General | Optical Contacting | Setting up thermocouples | Firstly, last night's heating did not
change the contacted surface area greatly,
but there is too many factors to speculate |
|
|
105
|
Wed Oct 19 21:51:10 2022 |
Jennifer Hritz | General | Optical Contacting | The trials and tribulations of the thermocouples | I intended to test the new thermocouple
set up today, but when I plugged them in,
both did not read a temperature. It took |
|
|
106
|
Thu Oct 20 22:43:05 2022 |
Jennifer Hritz | General | Optical Contacting | Wired the thermocouples backwards | Since the two devices are giving different
temperature readings, I would like to find
out if this imprecision is linear (e.g. they |
|
|
107
|
Fri Oct 21 22:22:37 2022 |
Jennifer Hritz | General | Optical Contacting | PWM v2.6 on new thermocouple set up | I performed the same tests I have been
doing prior (+180°C in 10 minutes)
but now with the (correctly wired) thermocouples |
|
|
108
|
Sat Oct 22 21:18:56 2022 |
Jennifer Hritz | General | Optical Contacting | PWM v3.0 | With v3.0, I took a couple steps backwards
by getting rid of the feature that increases
the heating rate so I can isolate the base |
|
|
109
|
Sun Oct 23 21:01:40 2022 |
Jennifer Hritz | General | Optical Contacting | PWM 3.0 (+280°C in 5) | I decided test how fast the plates
would heat up if the heat was just on constantly
on for 5 minutes. In general, these tests |
|
|
110
|
Mon Oct 24 21:23:22 2022 |
Jennifer Hritz | General | Optical Contacting | PWM 3.1 longer off times in cycle | To combat the bottom plate heating up much
faster than the top plate, I decided to try
increasing the cycle period from 1000ms (1s) |
|
|
Draft
|
Tue Oct 25 18:55:38 2022 |
Jennifer Hritz | General | Optical Contacting | PWM 3.1 very slow heating | [I'm behind on data processing, but
I'm creating an entry on the day I actually
run the tests] |
|
|
Draft
|
Thu Oct 27 19:54:20 2022 |
Jennifer Hritz | | | | Somehow I never thought of this before,
but instead of increasing the "on"
time of the hot plate to account for the |
|
|
126
|
Mon Feb 6 15:36:39 2023 |
Jennifer Hritz | General | Optical Contacting | Papers on making Q measurements of bonds | Upper limits on the mechanical
loss of silicate bonds in a silicon tuning
fork oscillator​ |
|
|
127
|
Fri Mar 24 20:27:46 2023 |
Jennifer Hritz | General | Optical Contacting | Controlling hot plate and recording temperature with one Arduino | Previously, we had one Arduino taking the
two thermocouple readings and another, separate
one controlling the PWM of the hot plate. |
|
|
22
|
Tue Aug 24 08:15:37 2021 |
Jiri Smetana | General | General | Actuation Feedback Model | I'm posting a summary of the work I've
done on the Lagrangian analysis of the Mariner
suspension design and a state space model |
|
|
26
|
Wed Sep 15 09:15:21 2021 |
Jiri Smetana | General | General | Actuation Feedback Model and Noise | I've implemented a more extensive feedback
model that uses proper conversions between
metres, volts, counts etc. and includes all |
|
|
27
|
Thu Sep 16 10:02:47 2021 |
Jiri Smetana | General | General | Actuation Feedback Model and Noise | Here's the DAC voltage spectrum with
its associated RMS.
Also, for clarity, this model is |
|
|
39
|
Tue Oct 12 12:44:44 2021 |
Jiri Smetana | General | General | New Damping Loop Model | I've ironed out the issues with my
MATLAB model so that it now shows correct
phase behaviour. The problem seems to arise |
|
|
40
|
Tue Oct 12 12:49:42 2021 |
Jiri Smetana | General | General | Damping Loop (Point-Mass Pendulums) | Now that I have correct phase and amplitude
behaviour for my MIMO state space model of
the suspension and the system is being correctly |
|
|
41
|
Thu Oct 14 04:17:36 2021 |
Jiri Smetana | General | General | Damping Loop (Point-Mass Pendulums) | Here are the DAC and residual displacement
spectra for different suspension heights
ranging from 450 mm to 600 mm. I aimed to |
8x |
|
44
|
Tue Oct 26 08:09:08 2021 |
Jiri Smetana | General | General | Lagrangian Suspension Model - Extended Body | I've been testing out the extended
body lagrangian models and I'm trying
to understand the ground motion and force |
|
|
49
|
Wed Nov 17 09:27:04 2021 |
Jiri Smetana | General | General | Lagrangian Model - Translation & Pitch | I've been having a look at the transfer
functions for the translation and pitch of
both masses. I'm attaching the plot of |
|