1. Monte Carlo simulations of charged particle transport in plasmas: A fast single-scattering model.
- Author
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Du, Bao, Kang, Dongguo, Liu, Chang, Shi, Yi, Zhang, Wenshuai, Deng, Luan, Song, Peng, Zou, Shiyang, Cai, Hong-bo, and Zhu, Shao-ping
- Subjects
MONTE Carlo method ,MULTIPLE scattering (Physics) ,DISTRIBUTION (Probability theory) ,SMALL-angle scattering ,PARTICLE tracks (Nuclear physics) - Abstract
When simulating a charged particle trajectory in plasmas with Monte Carlo methods, the traditional single-scattering model is accurate but computationally expensive. The traditional multiple-scattering model reduces the computation cost but assumes an exponential distribution of the scattering angle, which overestimates the cumulative scattering angle. In this paper, we develop a new Monte Carlo method for the charged particle transport simulations. The scattering angle is naturally sampled from a modified screened Rutherford scattering cross section, in which a greatly amplified minimum deflection angle is used. With this model, the simulations give the same scattering angle distribution with the single-scattering model but only take a comparable computation cost with the multiple-scattering model when the small scattering angle and Markovian approximations can be fulfilled. This model would be especially useful for the study of inertial-confinement-fusion, which is sensitive to the alpha-particle energy deposition. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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