Self-consistent inclusion of classical large-angle Coulomb collisions in plasma Monte Carlo simulations

JOURNAL OF COMPUTATIONAL PHYSICS

卷:299

Article

Turrell, A. E.¹  Sherlock, M.¹  Rose, S. J.¹ 

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, South Kensington SW7 2AZ, England

关键词: Monte Carlo;    Large-angle collisions;    Knock-ons;    Reaction-in-flight;    Inertial confinement fusion;    Plasma;   

DOI  :  10.1016/j.jcp.2015.06.034

来源: Elsevier

【 摘 要 】

Large-angle Coulomb collisions allow for the exchange of a significant proportion of the energy of a particle in a single collision, but are not included in models of plasmas based on fluids, the Vlasov-Fokker-Planck equation, or currently available plasma Monte Carlo techniques. Their unique effects include the creation of fast 'knock-on' ions, which may be more likely to undergo certain reactions, and distortions to ion distribution functions relative to what is predicted by small-angle collision only theories. We present a computational method which uses Monte Carlo techniques to include the effects of large-angle Coulomb collisions in plasmas and which self-consistently evolves distribution functions according to the creation of knock-on ions of any generation. The method is used to demonstrate ion distribution function distortions in an inertial confinement fusion (ICF) relevant scenario of the slowing of fusion products. (C) 2015 Elsevier Inc. All rights reserved.

【 授权许可】

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