G4-ASPP中带电粒子传播方法的发展和基准

IF 0.7 4区工程技术 Q3 MATHEMATICS, APPLIED

Journal of Computational and Theoretical Transport Pub Date : 2023-06-07 DOI:10.1080/23324309.2023.2240578

L. Stegeman, D. Fry, A. Bahadori

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引用次数: 0

摘要

摘要为了简化航天器的主动辐射屏蔽评估和设计，开发了一种新的运输工具G4-ASPP，该工具同时考虑了外部电磁场和大块屏蔽材料对带电粒子动力学的影响。进行了输运模拟，以评估G4-ASPP粒子在电磁场中传播方法与标准方法的准确性和速度。推导了G4-ASPP中使用的基于时间步长的Velocity-Verlet传播方法和类似的距离步长方法。讨论了每种方法的共选择性和相空间守恒性质。结果表明，在G4-ASPP中实现了四阶龙格-库塔距离步进方法，以在不牺牲太多速度的情况下提高轨迹精度。

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Development and Benchmarking of Charged Particle Propagation Methods in G4-ASPP

Abstract A new transport tool that simultaneously accounts for the impacts of external electromagnetic fields and bulk shielding material on charged particle dynamics, G4-ASPP, was developed to streamline active radiation shielding assessment and design for spacecraft. Transport simulations were performed to assess the accuracy and speed of G4-ASPP particle propagation methods in electromagnetic fields against standard methods. The time-step-based Velocity-Verlet propagation method and an analogous distance-stepping method used in G4-ASPP were derived. The symplecticity and phase-space conservation properties of each method are discussed. Results suggest the implementation of a 4th-order Runge-Kutta distance-stepping method into G4-ASPP to improve trajectory accuracy without sacrificing much speed.

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来源期刊

Journal of Computational and Theoretical Transport Mathematics-Mathematical Physics

CiteScore

1.30

自引率

0.00%

发文量

期刊介绍： Emphasizing computational methods and theoretical studies, this unique journal invites articles on neutral-particle transport, kinetic theory, radiative transfer, charged-particle transport, and macroscopic transport phenomena. In addition, the journal encourages articles on uncertainty quantification related to these fields. Offering a range of information and research methodologies unavailable elsewhere, Journal of Computational and Theoretical Transport brings together closely related mathematical concepts and techniques to encourage a productive, interdisciplinary exchange of ideas.