| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 | |
|
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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
|
|
|
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 |
|