Two-Dimensional Hybrid Model for High-Current Electron Beam Transport in a Dense Plasma

A two-dimensional hybrid code is developed to model the transport of a high-current electron beam in a dense plasma target. The beam electrons are treated as particles and described by particle-in-cell simulation including collisions with the target plasma particles. The background target plasma is...

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Published inPlasma science & technology Vol. 16; no. 11; pp. 1007 - 1012
Main Author 曹莉华 王欢 张华 刘占军 吴俊峰 李百文
Format Journal Article
LanguageEnglish
Published 01.11.2014
Subjects
Algorithms
Dense plasmas
Electron beams
Law
Mathematical models
Particle beams
Transport
Two dimensional
二维混合模型
传输模型
大电流
时间差分
法拉第定律
电子束传输
稠密等离子体
麦克斯韦分布
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ISSN1009-0630
DOI10.1088/1009-0630/16/11/03

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Summary:A two-dimensional hybrid code is developed to model the transport of a high-current electron beam in a dense plasma target. The beam electrons are treated as particles and described by particle-in-cell simulation including collisions with the target plasma particles. The background target plasma is assumed to be a stationary fluid with temperature variations. The return current and the self-generated electric and magnetic fields are obtained by combining Amp~re＇s law without the displacement current, the resistive Ohm＇s law and Faraday＇s law. The equations are solved in two-dimensional cylindrical geometry with rotational symmetry on a regular grid, with centered spatial differencing and first-order implicit time differencing. The algorithms implemented in the code are described, and a numerical experiment is performed for an electron beam with Maxwellian distribution ejected into a uniform deuterium-tritium plasma target.
Bibliography:electron beam transport; hybrid simulation; energy deposition
A two-dimensional hybrid code is developed to model the transport of a high-current electron beam in a dense plasma target. The beam electrons are treated as particles and described by particle-in-cell simulation including collisions with the target plasma particles. The background target plasma is assumed to be a stationary fluid with temperature variations. The return current and the self-generated electric and magnetic fields are obtained by combining Amp~re＇s law without the displacement current, the resistive Ohm＇s law and Faraday＇s law. The equations are solved in two-dimensional cylindrical geometry with rotational symmetry on a regular grid, with centered spatial differencing and first-order implicit time differencing. The algorithms implemented in the code are described, and a numerical experiment is performed for an electron beam with Maxwellian distribution ejected into a uniform deuterium-tritium plasma target.
CAO Lihua , WANG Huan , ZHANG Hua , LIU Zhanjnn , WU Junfeng , LI Baiwen（ 1.Institute of Applied Physics and Computational Mathematics, Beijing 100094, China ;2.HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871 China）
34-1187/TL
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ISSN:1009-0630
DOI:10.1088/1009-0630/16/11/03