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Numerical investigation of the influence of large turbulence scales on the parallel and perpendicular transport of cosmic rays
Qin, G.; Shalchi, A.; Shalchi, A (reprint author), Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada.
Department空间科学部
Source PublicationADVANCES IN SPACE RESEARCH
2012
Volume49Issue:12Pages:1643-1652
ISSN0273-1177
Language英语
KeywordMagnetic Fields Turbulence Energetic Particles
AbstractIn recent analytical investigations it has been demonstrated that the turbulence behavior at large scales has a very strong influence on the perpendicular diffusion coefficient of charged particles. In the present paper we use computer simulations to investigate numerically cross field transport and particle propagation along the mean magnetic field for different turbulence models at large scales. Our results are compared with quasilinear theory and nonlinear diffusion theories. We show that for different forms of the turbulence spectrum at large scales, the perpendicular mean free paths obtained numerically are in agreement with recent predictions made by analytical theory. It is also shown that the parallel diffusion coefficient contains always a strong nonlinear contribution which is, however, independent of the assumed spectrum at large scales. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.; In recent analytical investigations it has been demonstrated that the turbulence behavior at large scales has a very strong influence on the perpendicular diffusion coefficient of charged particles. In the present paper we use computer simulations to investigate numerically cross field transport and particle propagation along the mean magnetic field for different turbulence models at large scales. Our results are compared with quasilinear theory and nonlinear diffusion theories. We show that for different forms of the turbulence spectrum at large scales, the perpendicular mean free paths obtained numerically are in agreement with recent predictions made by analytical theory. It is also shown that the parallel diffusion coefficient contains always a strong nonlinear contribution which is, however, independent of the assumed spectrum at large scales. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3190
Collection空间科学部
Corresponding AuthorShalchi, A (reprint author), Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada.
Recommended Citation
GB/T 7714
Qin, G.,Shalchi, A.,Shalchi, A . Numerical investigation of the influence of large turbulence scales on the parallel and perpendicular transport of cosmic rays[J]. ADVANCES IN SPACE RESEARCH,2012,49(12):1643-1652.
APA Qin, G.,Shalchi, A.,&Shalchi, A .(2012).Numerical investigation of the influence of large turbulence scales on the parallel and perpendicular transport of cosmic rays.ADVANCES IN SPACE RESEARCH,49(12),1643-1652.
MLA Qin, G.,et al."Numerical investigation of the influence of large turbulence scales on the parallel and perpendicular transport of cosmic rays".ADVANCES IN SPACE RESEARCH 49.12(2012):1643-1652.
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