ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1
|
Thu May 21 11:51:44 2020 |
Koji | General | General | Mariner Elog Test | The first entry of the Mariner elog post |
|
|
2
|
Thu May 21 12:10:03 2020 |
Stephen | General | Resources | Ongoing Mariner Resources | Ongoing points of updates/content (list
to be maintained and added)
Mariner |
|
|
3
|
Fri Jun 5 11:13:50 2020 |
Raymond | General | Heat Load | Steady state heat load example | Attached is a cartoon partial view into
the heat load experienced by the Mariner
assembly. |
|
|
4
|
Thu Mar 4 17:04:52 2021 |
Paco | General | Design specs | Silicon TM dichroic coatings for phase I | Have been using the 40m
Coatings repo code by Gautam (with some
modifications to make dichroic designs under |
|
|
5
|
Fri Mar 5 11:05:13 2021 |
Stephen | General | Design specs | Feasibility of 6" optic size in CAD | 6" vs 4" optic size comparison
using CAD - worth hopping into the 3D geometry
using the link below, but also posting a |
|
|
6
|
Wed Mar 17 19:51:42 2021 |
Paco | General | Design specs | Silicon TM dichroic coatings for phase I | Update on ETM
New optima are
being found using the same basic code with
some modifications, which I summarize below; |
|
|
7
|
Wed Mar 17 21:24:27 2021 |
gautam | General | Design specs | Silicon TM dichroic coatings for phase I | I guess you have tried it already - but
does enforcing the stacks to be repeating
bilayer pairs of the same thickness fail |
|
|
8
|
Wed Mar 24 17:36:46 2021 |
Paco | General | Design specs | Least common multiple stacks and varL cost | Update on ETM/ITM coating design;
-
Following what seemed like a good, intuitive
suggestion from Anchal, I implemented a parameter |
|
|
9
|
Wed Mar 24 17:42:50 2021 |
Paco | General | Design specs | Silicon TM dichroic coatings for phase I | Yeah, the magnitudes are the inverse weighted
scalar costs (so they lie on the appropriate
relative scale) and indeed larger enclosed |
|
|
10
|
Fri Apr 2 19:59:53 2021 |
Paco | General | Design specs | Differential evolution strategies | Differential evolution strategies 'benchmarking'
for thin film optimization
Since
I have been running the ETM/ITM coatings |
|
|
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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12
|
Tue Apr 27 12:28:43 2021 |
Nina Vaidya & Shruti Maliakal | General | Design specs | Arm Cavity Design 2021 | Rana’s code: R_c = 57.3
-->New code with optimization:
sweeping through a range of R_c, using a |
|
|
13
|
Fri May 7 09:57:18 2021 |
Stephen | General | Equipment | Overall Dimensions for Mariner Suspension Test Chamber Concept | Koji, Stephen
Putting together Koji's design
work with Stephen's CAD, we consider |
|
|
14
|
Fri May 7 17:50:31 2021 |
Nina Vaidya & Shruti Maliakal | General | Design specs | Arm Cavity Design 2021 update | Here are the final slides with all the
results on the Arm Cavity Design, please
review. |
|
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15
|
Fri Jun 4 11:09:27 2021 |
Paco | General | Design specs | HR coating tolerance analysis | The HR coating specifications are:
ETM |
|
|
16
|
Tue Jun 22 22:28:09 2021 |
Koji | General | Design specs | Test Mass wedge design | The
ETM wedge of 0.5deg will allow us to separate
the AR reflections. We will be OK with the |
|
|
17
|
Wed Jun 30 16:21:53 2021 |
Stephen | General | Design specs | | [Stephen, Koji]
WIP - check layout of 60 cm suspension
in chamber at 40m, will report here |
|
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18
|
Wed Jul 7 16:32:27 2021 |
Stephen | General | Equipment | Overall Dimensions for Mariner Suspension Test Chamber Concept | WIP - Stephen to check on new suspension
dimensions and fit into 40m chamber |
|
|
19
|
Tue Jul 27 11:38:25 2021 |
Paco | General | Design specs | DOPO single pass PDC efficiency | Here is a set of curves describing the
single-pass downconversion efficiency in
the 20 mm long PPKTP crystals for the DOPO. |
|
|
20
|
Fri Aug 6 04:34:43 2021 |
Koji | General | General | Theoretical Cooling Time Limit | I was thinking about how fast we can cool
the test mass. No matter how we improve the
emissivity of the test mass and the cryostat, |
|
|
21
|
Tue Aug 17 17:48:57 2021 |
Koji | General | Equipment | Crackle SW model | As a kickoff of the mariner sus cryostat
design, I made a tentative crackle chamber
model in SW. |
|
|
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 |
|
|
23
|
Thu Aug 26 17:40:41 2021 |
Stephen | General | Suspension | Selecting MOS-style frame | [Koji, Stephen]
Kind of a silly post, and not very
scientific, but we are sticking to it. During |
|
|
24
|
Thu Sep 9 11:25:30 2021 |
Paco | General | Design specs | Rerun HR coatings with n,k dispersion | [Paco]
I've re-run the HR coating
designs for both ETM and ITM using interpolated |
|
|
25
|
Thu Sep 9 20:42:34 2021 |
Paco | General | Design specs | Rerun HR coatings with n,k dispersion | [Paco]
Alright, I've done a re-optimization
targetting a wider T band around 2128 nm. |
|
|
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 |
|
|
28
|
Sun Sep 19 18:52:58 2021 |
Paco | General | Design specs | HR coating emissivity | [Paco, Nina]
We have been working on an estimate
of the wavelength dependent emissivity for |
|
|
29
|
Fri Sep 24 11:02:41 2021 |
Koji | General | General | Actuation Feedback Model and Noise | We had a meeting with the code open in
ZOOM. Here are some points we discussed:
The code requires another |
|
|
30
|
Fri Sep 24 13:12:00 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | *Note: the current modeling script can
be found at: CryoEngineering/MarinerCooldownEstimation.ipynb
Nina pointed me to the current |
|
|
31
|
Mon Sep 27 17:01:53 2021 |
rana | General | Heat Load | Mariner cooldown model status + next steps | How
about a diagram so that we can understand |
|
|
32
|
Wed Sep 29 16:15:19 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | Attachment 1 is a geometric diagram that
reflects the current state of the ITM cooldown
model, introduced in [30]. |
|
|
33
|
Fri Oct 1 11:52:06 2021 |
Paco | General | Design specs | HR coating emissivity | [Paco, Nina, Aidan]
Updated the stack emissivity code
to use the Kitamura paper fused silica dispersion |
|
|
34
|
Fri Oct 1 12:01:24 2021 |
Paco | General | Design specs | TM Barrel coating emissivity | [Paco, Nina, Aidan]
We ran our stack emissivity calculation
on different AR stacks to try and make a |
|
|
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 |
|
|
36
|
Fri Oct 1 14:11:23 2021 |
Paco | General | Design specs | TM Barrel coating emissivity | Agree with this.
Quickly running tmm on the same "stacks"
gave the Attachment #1-3. (Ignore the |
|
|
37
|
Tue Oct 5 17:46:14 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | Building on [32],
I added a copper cold finger to conductively
cool the inner shield, instead of holding |
|
|
38
|
Mon Oct 11 15:22:18 2021 |
Yehonathan | General | General | Microcomb alternatives | Following our discussion at the Friday
JC meeting, I gathered several resources
and made a small simulation to show how frequency |
|
|
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 |
|
42
|
Fri Oct 15 13:45:55 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | I used the same model in [37]
to consider how test mass length affects
the cooldown. Attachment 1 plots the curves |
|
|
43
|
Fri Oct 15 14:31:15 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | I reran the cooldown model, setting the
emissivity of the inner surface of the inner
shield to 0.7 (coating), and the emissivity |
|
|
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 |
|
|
45
|
Wed Nov 3 02:52:49 2021 |
Koji | General | Suspension | Mariner Sus Design | All parameters are temporary:
Test mass size: D150mm x L140mm
Intermediate mass size W152.4mm x |
|
|
46
|
Thu Nov 4 00:42:05 2021 |
Koji | General | Suspension | Mariner Sus Design | Some more progress:
- Shaved the height of the top
clamp blocks. We can extend the suspension |
|
|
47
|
Fri Nov 5 11:51:50 2021 |
Paco | General | Design specs | Estimate of in-air absorption near 2.05 um | [Paco]
I used the HITRAN database to download
the set of ro-vibrational absorption lines |
|
|
48
|
Tue Nov 16 11:47:54 2021 |
Paco | General | Design specs | Estimate of in-air absorption near 2.05 um | [Paco]
There was an error in the last
plot of the previous log. This was correctly |
|
|
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 |
|
|
50
|
Wed Dec 15 06:43:43 2021 |
Jiri Smetana | General | General | Lagrangian Model - Translation & Pitch | I've checked the validity of my state
space model in a couple of ways so that we
have confidence in the results that it gives. |
|
|
51
|
Thu May 5 19:56:25 2022 |
Koji | General | Suspension | Mariner Suspension Cryo shield Install / Removal steps | Does this work? Is this insane? |
|
|
52
|
Tue May 10 18:29:11 2022 |
rana | General | Suspension | Mariner Suspension Cryo shield Install / Removal steps | |
|
|
53
|
Thu Jun 16 14:04:30 2022 |
Juan | General | Suspension | Table for Mariner Suspension Cryo | Today we looked at possible locations for
where we will be setting up Mariner Suspension
and Cryo chamber. The first option was the |
|
|
54
|
Thu Jun 16 19:43:36 2022 |
Koji | General | Suspension | Table for Mariner Suspension Cryo | - B246/QIL Skyhook
Find the base of Skyhook.
It should be in the storage room (B246). |
|
|
55
|
Thu Jun 23 21:11:03 2022 |
Koji | General | Suspension | Table for Mariner Suspension Cryo | Table moving effort in the OMC lab: See
https://nodus.ligo.caltech.edu:8081/OMC_Lab/412
|
|
|
56
|
Mon Jun 27 08:22:22 2022 |
Juan | General | General | General Update/ Need to do task | I've managed to cut and crimp wires
for the power board for coil driver. I will
begin adding components to the coil driver |
|
|
57
|
Sat Jul 2 09:22:39 2022 |
Juan | General | General | Progress update | I've completed one coil driver board.
Hopefully next week I can finish the
other 2 boards and make the modifications |
|
|
58
|
Tue Jul 5 21:06:47 2022 |
Juan | General | General | Work Update | Update of my current work I have finished
one coil driver board and started on the
last two that I need here is the progress |
|
|
59
|
Thu Jul 7 10:23:04 2022 |
Juan | General | General | Update | Almost done with coil driver boards |
|
|
60
|
Thu Jul 7 15:20:04 2022 |
rana | General | Optical Contacting | some useful links | For our optical contacting, Jennifer and
I are starting out with glass (microscope
slides), with the setup in the EE shop next |
|
|
61
|
Fri Jul 8 17:09:10 2022 |
Juan | General | General | Coil Driver and Sat Amp | All three coil driver boards are complete
and have been tested. Modification for all
4 sat amp have been completed. Ideally, I |
|
|
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. |
|
|
64
|
Mon Jul 11 17:39:17 2022 |
Juan | General | General | Coil driver chassis | Finished all 3 Coil Drover chassis
and power lines still need to install the
rear cables will do that after I finish Sat |
|
|
65
|
Wed Jul 13 13:16:33 2022 |
Juan | General | General | Finished coil driver and sat amp | I have finished all coil driver and sat
amp chassis they all seem to be functioning
properly. |
|
|
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. |
|
|
67
|
Mon Jul 18 18:34:29 2022 |
Paco | General | Design specs | HR coating update | I've been running the HR coating optimization
for mariner TMs. Relative to the specifications
found here |
|
|
68
|
Fri Jul 22 13:36:55 2022 |
Paco | General | Design specs | HR coating update | Here are some corner plots to analyze the
sensitivity of the designs in the previous
elog to a 1% gaussian |
|
|
69
|
Fri Jul 22 13:47:47 2022 |
Juan | General | General | Update | Just a general update of what I have been
up to deriving Lagrange for double pendulum
system and also been looking at code that |
|
|
70
|
Tue Jul 26 14:17:44 2022 |
Juan | General | General | OSEMS actuators | we have 23 OSEMS they look all full built
and I will try and test them this week and
or next week. |
8x |
|
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 |
|
|
72
|
Thu Aug 4 11:26:55 2022 |
Juan | General | General | Sat Amp | Sat amp seems to be working just fine.
There does seem to be a saturation issue
with one of the outputs we may need to change |
|
|
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 |
|
|
74
|
Mon Aug 8 13:00:56 2022 |
Juan | General | General | Sat Amp testing of OSEMS | In the following test, a single Sat Amp
chassis that holds Sat Amp Board S1106078
and S1106077 |
|
|
75
|
Mon Aug 15 16:37:51 2022 |
Juan | General | General | Update on Sat Amp and OSEMs | Sat
Amp
|
|
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76
|
Tue Aug 16 09:58:23 2022 |
Paco | General | Design specs | HR coating update | A couple of coating stacks with better
tolerance (transmission +- 10%). Attachments
#1-2 show the spectral reflectivities |
6x |
|
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 |
|
|
78
|
Tue Aug 23 17:10:50 2022 |
Paco | General | Design specs | New corner plots | Instead of varying individual layer thicknesses
using the MC sampler, I made sure both the
thickness and index of refractions are varied |
|
|
79
|
Fri Aug 26 14:24:57 2022 |
Radhika | General | Heat Load | Mariner TM Cooldown model | Here I describe the current radiative cooldown
model for a Mariner test mass, using parameters
from the most recent CAD model. A diagram |
6x |
|
80
|
Mon Aug 29 15:44:46 2022 |
Radhika | General | Heat Load | Mariner TM Cooldown model | Here is a more detailed analysis of varying
the length and radius of the snout.
Attachment 1 plots the heat load |
|
|
81
|
Wed Sep 7 10:42:12 2022 |
Radhika | General | Heat Load | Mariner TM Cooldown model | The attached plot (upper) compares the
heat load delivered to the test mass from
various snout lengths (end to end), as a |
|
|
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 |
|
|
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 |
|
|
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.
|
|
|
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
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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] |
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112
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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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Draft
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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 |
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114
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Thu Oct 27 22:12:21 2022 |
rana | General | Optical Contacting | plotting and PID | The Arduino / AC PWM interface looks good.
I recommend that you maintain the code in
GitHub and post a link to the repo whenever |
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117
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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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118
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Sat Jan 7 17:08:47 2023 |
Sophia Adams | General | Optical Contacting | | I am getting started on building the arduino
circuit as well as setting up my computer
so I can communicate between jupyter notebook |
|
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119
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Mon Jan 9 16:18:50 2023 |
Sophia Adams | General | Optical Contacting | | |
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120
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Mon Jan 9 21:03:53 2023 |
Koji | General | General | Heavy item transport - preparation | 1) Paco cleared the path in the DOPO lab.
We'll need a flat dolly or wooden bars
(covered with a mylar sheet) to place the |
|
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121
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Tue Jan 10 23:30:25 2023 |
Koji | General | General | Heavy item transport - preparation | [JC, Stephen, Paco, Gabriele, Aidan,
Radhika, Koji]
We have successfully extracted |
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122
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Thu Jan 12 11:38:26 2023 |
Koji | General | General | How to move the large engine hoist through the narrow door | See the attachments. |
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123
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Thu Jan 12 11:54:08 2023 |
Koji | General | General | Heavy item transport | [JC, Koji]
Caltech transport came in this
morning. They first went to the OMC lab and |
7x |
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124
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Thu Jan 12 15:36:22 2023 |
Koji | General | General | Crane configuration for the suspension test chamber | I made a quick investigation of the crane
configuration for the suspension test chamber.
Conclusions: |
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125
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Thu Feb 2 17:28:37 2023 |
Sophia Adams | General | Optical Contacting | Test of Temperature Reading of One Plate |
The arduino was able to read temperature |
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126
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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​ |
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127
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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. |
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128
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Wed Apr 12 12:03:34 2023 |
Radhika | General | Heat Load | Mariner TM Cooldown model | Here we lay out the Mariner cryocooler
requirements and discuss the most recent
cooldown model, which includes a cryocooler that cools |
|
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129
|
Fri Jun 2 11:31:29 2023 |
Radhika | General | Heat Load | Mariner TM Cooldown model | Summarizing the current Mariner ITM cooldown
model assumptions:
- Inner shield and outer shield |
|
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130
|
Fri Jun 23 15:37:39 2023 |
Radhika | General | Heat Load | Mariner TM Cooldown model | I simulated the Mariner cooldown with an
additional
LN2 tank connected to the main cold strap |
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131
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Mon Jun 26 13:53:40 2023 |
Sophia Adams | General | Optical Contacting | cantilever geometry to find the quality factor of a silicon bond | I am trying to design a cantilever setup
to find the quality factor of optically bonded
silicon. The cantilever will be given an |
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132
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Fri Aug 4 17:07:41 2023 |
Radhika | General | Heat Load | Mariner TM Cooldown model | Here is the model including an additional
LN2 tank aiding in inner shield cooldown, |
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133
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Tue Aug 22 10:16:54 2023 |
Sophia Adams | General | Optical Contacting | Matlab fminsearch Cantilever Geometry Optimization | I am trying to use fminsearch to find the
best cantilever dimensions to maximize the
bond/cantilever energy ratio. Fminsearch |
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134
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Tue Aug 22 12:12:05 2023 |
Sophia Adams | General | Optical Contacting | Matlab fminsearch Cantilever Geometry Optimization | The code works now. If the function is
specified by a file, there should be an @
symbol front of it when it is passed into |
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135
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Tue Aug 22 13:14:22 2023 |
Sophia Adams | General | Optical Contacting | Matlab fminsearch Cantilever Geometry Optimization | Restricting the search to nothing less
than the initial parameters (L = 2 cm, h
= 0.3 mm, d = 0.55 mm), fminsearch outputs |
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136
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Wed Aug 23 11:13:58 2023 |
Sophia Adams | General | Optical Contacting | Matlab fminsearch Cantilever Geometry Optimization | I am trying to get a plot of the fminsearch
data, but I was not sure how to extract the
data. But fminsearch has built in plots that |
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137
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Wed Aug 23 16:34:47 2023 |
Sophia Adams | General | Optical Contacting | Matlab Cantilever Geometry Optimization | Here is the code to generate a random list
of parameters and evaluate the energy ratio
of each. |
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138
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Fri Aug 25 13:25:05 2023 |
Radhika | General | General | Summary of JPL/Ball cryocooler discussion | Here is a summary of the cryocooler discussion
hosted at JPL.
Dave Glaister of Ball Aerospace |
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