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PlasmaModuleUsersGuide.pdf
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比较全面的用户手册,适合于等离子体仿真的各级用户,初学者全面学习,进阶者备用查找。对等离子体的理论解释比较全面,但较笼统,不够细致,要详细还得学习教科书。
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Plasma Module
User’s Guide
Contact Information
Visit the Contact COMSOL page at www.comsol.com/contact to submit general
inquiries, contact Technical Support, or search for an address and phone number. You can
also visit the Worldwide Sales Offices page at www.comsol.com/contact/offices for
address and contact information.
If you need to contact Support, an online request form is located at the COMSOL Access
page at www.comsol.com/support/case. Other useful links include:
• Support Center: www.comsol.com/support
• Product Download: www.comsol.com/product-download
• Product Updates: www.comsol.com/support/updates
• COMSOL Blog: www.comsol.com/blogs
• Discussion Forum: www.comsol.com/community
• Events: www.comsol.com/events
• COMSOL Video Gallery: www.comsol.com/video
• Support Knowledge Base: www.comsol.com/support/knowledgebase
Part number: CM021401
Plasma Module User’s Guide
© 1998–2018 COMSOL
Protected by patents listed on www.comsol.com/patents, and U.S. Patents 7,519,518; 7,596,474;
7,623,991; 8,219,373; 8,457,932; 8,954,302; 9,098,106; 9,146,652; 9,323,503; 9,372,673; and
9,454,625. Patents pending.
This Documentation and the Programs described herein are furnished under the COMSOL Software License
Agreement (www.comsol.com/comsol-license-agreement) and may be used or copied only under the terms
of the license agreement.
COMSOL, the COMSOL logo, COMSOL Multiphysics, COMSOL Desktop, COMSOL Server, and
LiveLink are either registered trademarks or trademarks of COMSOL AB. All other trademarks are the
property of their respective owners, and COMSOL AB and its subsidiaries and products are not affiliated
with, endorsed by, sponsored by, or supported by those trademark owners. For a list of such trademark
owners, see www.comsol.com/trademarks.
Version: COMSOL 5.4
CONTENTS | 3
Contents
Chapter 1: Introduction
About the Plasma Module 14
Why Plasma is Used in Modeling . . . . . . . . . . . . . . . . . 14
How the Plasma Module Helps Improve Your Modeling . . . . . . . . 15
Plasma Module Nomenclature . . . . . . . . . . . . . . . . . . 16
The Plasma Module Physics Interface Guide. . . . . . . . . . . . . 18
Common Physics Interface and Feature Settings and Nodes . . . . . . 20
Where Do I Access the Documentation and Application Libraries? . . . . 20
Overview of the User’s Guide 24
Chapter 2: Data Required for Plasma Modeling
Data Requirements 28
Electron Impact Reactions . . . . . . . . . . . . . . . . . . . 28
Reaction . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Surface Reaction . . . . . . . . . . . . . . . . . . . . . . . 30
Species . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Importing Collision Cross-Section Data 34
Cross-Section Data File Format . . . . . . . . . . . . . . . . . 34
The File Format . . . . . . . . . . . . . . . . . . . . . . . 35
References for the Plasma Module Cross-Section Data Requirements . . . 37
Chapter 3: The Boltzmann Equation,
Two-Term Approximation Interface
The Boltzmann Equation, Two-Term Approximation Interface 40
Global Nodes for the Boltzmann Equation, Two-Term Approximation
4 | CONTENTS
Interface. . . . . . . . . . . . . . . . . . . . . . . . . 43
Boltzmann Model. . . . . . . . . . . . . . . . . . . . . . . 44
Initial Values . . . . . . . . . . . . . . . . . . . . . . . . 45
Cross Section Import . . . . . . . . . . . . . . . . . . . . . 46
Electron Impact Reaction. . . . . . . . . . . . . . . . . . . . 46
Theory for the Boltzmann Equation, Two-Term Approximation
Interface 48
The Electron Energy Distribution Function . . . . . . . . . . . . . 48
Boltzmann Equation, Two-Term Approximation . . . . . . . . . . . 49
References for the Boltzmann Equation, Two-Term Approximation
Interface. . . . . . . . . . . . . . . . . . . . . . . . . 55
Chapter 4: The Drift Diffusion Interface
The Drift Diffusion Interface 58
Domain, Boundary, and Pair Nodes for the Drift Diffusion Interface . . . 61
Drift Diffusion Model . . . . . . . . . . . . . . . . . . . . . 62
Initial Values . . . . . . . . . . . . . . . . . . . . . . . . 65
Electron Production Rate . . . . . . . . . . . . . . . . . . . 65
General Power Deposition . . . . . . . . . . . . . . . . . . . 65
Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Inductive Power Deposition. . . . . . . . . . . . . . . . . . . 66
Microwave Power Deposition . . . . . . . . . . . . . . . . . . 66
Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Electron Density and Energy . . . . . . . . . . . . . . . . . . 67
Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Flux . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Electron Outlet . . . . . . . . . . . . . . . . . . . . . . . 69
Theory for the Drift Diffusion Interface 70
Introduction to Drift Diffusion Theory . . . . . . . . . . . . . . 70
Electron Transport Theory . . . . . . . . . . . . . . . . . . . 72
Source Coefficients . . . . . . . . . . . . . . . . . . . . . . 74
Stabilization . . . . . . . . . . . . . . . . . . . . . . . . . 75
Tensor Transport Properties . . . . . . . . . . . . . . . . . . 75
CONTENTS | 5
The Wall Boundary Condition. . . . . . . . . . . . . . . . . . 76
The Insulation Boundary Condition . . . . . . . . . . . . . . . . 77
The Electron Density and Energy Boundary Condition . . . . . . . . 77
Reference for the Drift Diffusion Interface . . . . . . . . . . . . . 78
Chapter 5: The Heavy Species Transport Interface
The Heavy Species Transport Interface 80
Domain, Boundary, and Pair Nodes for the Heavy Species Transport
Interface. . . . . . . . . . . . . . . . . . . . . . . . . 85
Cross Section Import . . . . . . . . . . . . . . . . . . . . . 86
Diffusion and Migration . . . . . . . . . . . . . . . . . . . . 86
Electron Impact Reaction. . . . . . . . . . . . . . . . . . . . 88
Reaction . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Species . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Surface Reaction . . . . . . . . . . . . . . . . . . . . . . . 97
Surface Species . . . . . . . . . . . . . . . . . . . . . . 100
Flux . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Outflow . . . . . . . . . . . . . . . . . . . . . . . . . 102
Symmetry . . . . . . . . . . . . . . . . . . . . . . . . 103
Theory for the Heavy Species Transport Interface 104
About the Transport Equations . . . . . . . . . . . . . . . . 104
Multicomponent Diffusion Equations . . . . . . . . . . . . . . 105
Additional Quantities of Interest . . . . . . . . . . . . . . . . 109
Auxiliary Relations . . . . . . . . . . . . . . . . . . . . . 109
Source Coefficients . . . . . . . . . . . . . . . . . . . . . 110
Thermodynamic Properties . . . . . . . . . . . . . . . . . . 111
Species Transport Properties . . . . . . . . . . . . . . . . . 112
Mixture Transport Properties . . . . . . . . . . . . . . . . . 113
Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Stabilization . . . . . . . . . . . . . . . . . . . . . . . . 115
Surface Reactions . . . . . . . . . . . . . . . . . . . . . 115
Flux Matching . . . . . . . . . . . . . . . . . . . . . . . 117
About Surface Species . . . . . . . . . . . . . . . . . . . . 118
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