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A MPM Mixed Model Simulation Method Applied to Numerical Simulation of ECR ​​Ion Source

A numerical simulation and mixed model technology, applied in complex mathematical operations, etc.

Active Publication Date: 2020-08-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the above problems and deficiencies, in order to solve the technical problems of model accuracy and calculation consumption in the PIC / MCC algorithm of the ECR ion source, the present invention provides a MPM mixed model simulation method applied to the numerical simulation of the ECR ion source. While maintaining high simulation accuracy and computational efficiency, the advantages of rich numerical diagnosis of the PIC / MCC algorithm are maintained

Method used

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  • A MPM Mixed Model Simulation Method Applied to Numerical Simulation of ECR ​​Ion Source
  • A MPM Mixed Model Simulation Method Applied to Numerical Simulation of ECR ​​Ion Source
  • A MPM Mixed Model Simulation Method Applied to Numerical Simulation of ECR ​​Ion Source

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Embodiment Construction

[0064] The present invention will be described in further detail below by way of examples.

[0065] In the example, the MPM hybrid model simulation method in a regular circular waveguide filled with a neutral gas is tested. The microwave working mode is TE01; the working gas is argon; the collision types considered include elastic collisions and charge exchange collisions between ions and neutral particles, and elastic collisions, excitation collisions and ionization collisions between electrons and neutral particles.

[0066] Step 1. Calculate the pattern feature vector.

[0067] Calculate the eigenvector of the TE01 mode. Since the radius of the regular circular waveguide is fixed, the eigenvector does not change with the axial position z.

[0068]

[0069]

[0070] Among them, the cut-off wave number normalization constant j' 01 ≈3.832.

[0071] Step 2. Calculate the current source term.

[0072] According to the current position r and velocity υ of charged pa...

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Abstract

The invention belongs to the technical field of ECR ​​ion source numerical simulation, and specifically relates to an MPM hybrid algorithm applied to ECR ion source numerical simulation. The present invention is applicable to the structure of ECR ​​ion source. By combining MAGY theory and PIC / MCC simulation algorithm, an MPM hybrid algorithm for ECR ion source simulation is established, wherein the time-varying electromagnetic field is described by MAGY theory, and the self-consistent interaction between charged particles and electromagnetic field is determined by PIC algorithm. Description, the collision process between particles is described by the MCC algorithm. And it simplifies the complex and complete solution process of Maxwell's equations to the solution of a set of coupled one-dimensional partial differential equations about the mode amplitude, and because the mode amplitude changes more slowly than the high-frequency period, The time step can also be relatively larger, which greatly reduces the computational complexity and amount of calculation. In addition, because the electromagnetic model is used, it can describe the actual physical process more accurately than the electrostatic model.

Description

technical field [0001] The invention belongs to the technical field of ECR ​​ion source numerical simulation. Specifically, it is an MPM mixed model simulation method applied to numerical simulation of ECR ​​ion sources. Background technique [0002] In recent decades, relying on the advanced large-scale scientific equipment of heavy ion accelerators, a discipline group with heavy ion nuclear physics as the core has been formed, including the study of hadrons, nuclei, atoms, molecules, clusters in the microscopic world, and the macroscopic world. Conduct basic research for in-depth understanding and cognition of plasma, solid, celestial bodies, and the universe, as well as carry out applied basic research and applied research for the benefit of mankind in interdisciplinary fields such as aerospace, energy, materials, biology, and medicine. These heavy ion accelerator devices without exception require high-performance high-current high-charge state ion beam ion source device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/11
Inventor 金晓林雷雳黄桃李斌杨中海
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA