模拟带电粒子动力学的自适应辛方法研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2019-01-01 DOI:10.3934/jcd.2019022

Yanyan Shi, Yajuan Sun, Yulei Wang, Jian Liu

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引用次数: 5

摘要

在等离子体模拟中，需要计算效率高、长期稳定的数值方法。本文构造了具有自适应时间步长的辛方法来模拟带电粒子在电磁场作用下的动力学。利用专门设计的步长函数，研究了三种不同磁场下彭宁阱中带电粒子的运动，以及托卡马克中失控电子的动力学。数值实验结果表明了所推导的自适应辛方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Study of adaptive symplectic methods for simulating charged particle dynamics

In plasma simulations, numerical methods with high computational efficiency and long-term stability are needed. In this paper, symplectic methods with adaptive time steps are constructed for simulating the dynamics of charged particles under the electromagnetic field. With specifically designed step size functions, the motion of charged particles confined in a Penning trap under three different magnetic fields is studied, and also the dynamics of runaway electrons in tokamaks is investigated. The numerical experiments are performed to show the efficiency of the new derived adaptive symplectic methods.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.