Higher order volume-preserving schemes for charged particle dynamics

Higher order volume-preserving schemes for charged particle dynamics
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带电粒子动力学的高阶体积保持方案

DOI:
10.1016/j.jcp.2015.10.032
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发表时间:
2016-01
影响因子:
4.1
通讯作者:
Hong Qin
Hong Qin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yang He;Yajuan Sun;Jian Liu;Hong Qin

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基于处理技术发展了一类求解带电粒子在一般电磁场中推进问题的高阶数值方法。以保体积方法为核心,处理后的方法仍然是保体积的,并且保持了Lorenz力系的守恒量。此外,这类数值方法是显式的,与其他高阶复合方法相比更有效。通过对试验方程应用数值方法,给出了线性稳定性分析。结果表明,新构造的高阶方法具有较好的稳定性。这允许在它们的实现中使用更大的步长。
A class of higher order numerical methods for advancing the charged particles in a general electromagnetic field is developed based on processing technique. By taking the volume-preserving methods as the kernel, the processed methods are still volume-preserving, and preserve the conservative quantities for the Lorenz force system. Moreover, this class of numerical methods are explicit and are more efficient compared with other higher order composition methods. Linear stability analysis is given by applying the numerical methods to the test equation. It is shown that the newly constructed higher order methods have the better stability property. This allows the use of larger step sizes in their implementation.
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