| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
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63
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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62
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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68
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Tue Jul 23 20:53:45 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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69
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Wed Jul 24 21:08:24 2013 |
Deep Chatterjee | Optics | General | TR results for different dimensions | In this post I simulate the procedure of
calculating the TR noise for finite cavities
as proposed by Heinert and check for a |
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70
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Thu Jul 25 11:36:17 2013 |
rana | Optics | General | TR results for different dimensions |
PDF |
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71
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Thu Jul 25 13:21:46 2013 |
Deep Chatterjee | Optics | General | TR results for different dimensions |
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72
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Thu Jul 25 15:54:58 2013 |
Deep Chatterjee | Optics | General | TR results for different dimensions |
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73
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Mon Jul 29 22:42:57 2013 |
Deep Chatterjee | Optics | General | Avoiding transient solutions in the Computation of TE/TR noise | An error was being encountered in the computation
of the TR noise lately. It was observed that
while running the simulations in the case |
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74
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Wed Jul 31 15:39:11 2013 |
Deep Chatterjee | Optics | General | First try with paramter optimization for TE and TR noise profiles | After the simulations have been found to
match to a fair extent with the analytic
results by Heinert and Liu and Thorne, the |
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75
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Thu Aug 8 17:17:19 2013 |
Deep Chatterjee | Optics | General | Something like cancellation | For the material parameters of Sapphire
at 300K, the TE and TR Noise profiles, though
not very close, lie close to within an order |
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86
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Tue Jun 24 14:35:42 2014 |
Sam Moore | Optics | General | Trying to Verify the Heinert Model | |
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87
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Tue Jun 24 17:05:24 2014 |
Sam Moore | Optics | General | Trying to Verify the Heinert Model | It does appear that the simplified
model is only relevant for the simulations.
To quote Heinert: "An efficient |
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88
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Sat Jun 28 21:59:11 2014 |
Sam Moore | Optics | General | Difficulty with the COMSOL stationary module; Test Cases | Here, I describe some test cases
to see if COMSOL's solutions are agreeing
with some simple analytical solutions. Right |
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89
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Sun Jun 29 15:37:18 2014 |
Sam Moore | Optics | General | Difficulty with the COMSOL stationary module; Test Cases |
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90
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Sun Jun 29 20:25:44 2014 |
Koji | Optics | General | Difficulty with the COMSOL stationary module; Test Cases | What about this example? The result is
easier to understand intuitively.
Consider a bar with the length of |
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93
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Thu Jul 10 16:51:14 2014 |
Sam Moore | Optics | General | Duan and Heinert Comparison | (See Plots in attached document)
My plan has been to replicate Duan's |
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95
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Mon Jul 14 19:09:14 2014 |
Sam Moore | Optics | General | Using Heinert's Solution for Duan's Parameters | I have plotted Heinert's analytical
solution for TR noise using Duan's parameters.
Since TO and TE noise can be found |
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96
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Mon Jul 14 19:14:31 2014 |
Sam Moore | Optics | General | Duan and Heinert Comparison |
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97
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Thu Jul 31 20:55:38 2014 |
Sam Moore | Optics | General | Finding the Right Meshing for the TIR cavity | In this document, I try to identify
I good mesh by comparing the numerical solution
from that mesh with my analytical model. |
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98
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Sat Aug 2 00:22:34 2014 |
Sam Moore | Optics | General | Finding the Right Meshing for the TIR cavity |
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108
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Fri Jul 29 14:33:41 2016 |
Joy Westland | Mechanics | General | A Tutorial in Importing SolidWorks Files and Applying a Gaussian Force in ANSYS for a LIGO Test Mass | Here is a tutorial in importing SolidWorks
into ANSYS and the steps needed to apply
a Gaussian Force to the LIGO test mass that’s |
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114
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Mon Jul 31 22:18:57 2017 |
rana | General | General | using more than 12 cores in matlab | Since
2014, the limit of 12 workers using the matlab
parallel computing toolbox has been lifted. |
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127
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Sat Mar 17 15:27:48 2018 |
rana | General | General | file size >> small | When saving your COMSOL files do these
two things to make the files much smaller
(good for saving in version control and sharing): |
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128
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Mon Aug 20 15:44:56 2018 |
rana | General | General | file size >> small | Also,
click 'Clear Mesh'
under the mesh menu
'Clear |
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138
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Tue May 12 14:16:28 2020 |
Koji | General | General | FEA tutorial resources | cf. Forwarded email from Stephen
1) Tuesday Demo - Basics of FEA
Meshing G2000696 |
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142
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Thu Jul 6 11:35:55 2023 |
Rajashik | General | General | Basic Demonstration of Cavity Scan | Attached are plots of how HOMs are introduced
by defects in the mirror. This is just an
example for a basic FP Cavity. |
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144
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Sat Jul 29 00:19:02 2023 |
Rajashik | Optics | General | | I have coded a rudimentary triangular model
using parameters provided by Aaron. In this
model, I have kept a simple PDH signal which |
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115
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Thu Nov 2 17:23:56 2017 |
Aaron | Mechanics | PonderSqueeze | Modelling suspension noise | aLIGO Suspensions Toy Model
On
Wednesday I started making my own model
of the aLIGO suspensions, with the top of |
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116
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Fri Nov 3 15:03:10 2017 |
Aaron | Mechanics | PonderSqueeze | Modelling suspension noise | Model Geometry
Test
Mass
I found the dimension
of the test mass flat in the drawings of |
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117
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Wed Nov 15 14:05:12 2017 |
Aaron | Mechanics | PonderSqueeze | Modelling suspension noise | Model Geometry
I
pared down the number of parameters in the
model to only the necessary ones. These are |
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118
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Mon Dec 4 16:27:13 2017 |
aaron | Mechanics | PonderSqueeze | | Meshing Surface Layers
Defining
New Selections
I don't know
why I wasn't seeing this problem with |
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119
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Mon Dec 4 17:42:53 2017 |
gautam | Mechanics | PonderSqueeze | FEA on optimus | We could run the simulations on the 32
core machine in the 40m lab (optimus)? I
think Mariia was running some of her studies |
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120
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Mon Dec 4 19:49:32 2017 |
gautam | Mechanics | PonderSqueeze | FEA on optimus | It's a good idea, I'll check out
her elogs and get it started tonight.
I found that I had the relative |
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121
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Tue Dec 5 10:50:54 2017 |
aaron | Mechanics | PonderSqueeze | FEA on optimus | I had some trouble running this on optimus.
Optimus has COMSOL 5.1 installed,
but I made these files in 5.3. I downloaded |
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122
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Tue Dec 5 19:50:47 2017 |
aaron | Mechanics | PonderSqueeze | FEA on optimus | Gautam advised me against trying to install
version 5.3, lest it break version 5.1--I
had already gone through the install, but |
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123
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Tue Dec 12 11:50:12 2017 |
aaron | Mechanics | PonderSqueeze | FEA on optimus | Simulation results
First
run
Gautam ran the
COMSOL model on sandbox1 since we were trying |
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124
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Thu Jan 18 21:13:59 2018 |
aaron | Optics | PonderSqueeze | modifications to Gautam's 40m finesse model | I made a copy of Gautam's 40m model
to add the unstable filter cavity for
the ponderomotive squeezing project. I wanted |
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125
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Mon Jan 22 21:13:25 2018 |
aaron | Mechanics | PonderSqueeze | tips from Shoaib | I talked with Shoaib about some changes
I could make to the FEA model to improve
convergence and reduce memory usage. Summary: |
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126
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Mon Jan 29 23:02:13 2018 |
aaron | Mechanics | PonderSqueeze | tips from Shoaib | I started implemented some of these changes:
Started the mesh with a
boundary free quad mesh on the interface |
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109
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Sun May 7 18:22:35 2017 |
rana | General | Voyager | Voyager ITM: Radiative cooling with cold shield and cold CP | I took
Aidan's COMSOL model for the ITM from |
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130
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Sun Aug 26 19:21:27 2018 |
rana | General | Voyager | Voyager ITM: Radiative cooling with cold shield and cold CP | this is a time dependent model of the previous
steady-state one
Cold Shield and CP held |
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141
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Thu Jun 22 14:12:04 2023 |
Raj | General | aLIGO | Finesse Modelling for aLIGO | The aLIGO model available on IFOSim uses
the first surface of the mirror as Port 1
and the other surface as Port 2. This requires |
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