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Dynamics of charged particles and perpendicular diffusion in turbulent magnetic field
Gao, Xinliang; Lu, Quanming; Wang, Shui; Lu, QM (reprint author), Univ Sci & Technol China, CAS Key Lab Basic Plasma Phys, Dept Geophys & Planetary Sci, Hefei 230026, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICS AND SPACE SCIENCE
2011
Volume335Issue:2Pages:399-403
ISSN0004-640X
Language英语
KeywordTurbulent Magnetic Field Perpendicular Diffusion Test Particle Simulation Nonlinear Guiding Center Theory
AbstractA test particle code is employed to explore the dynamics of charged particles and perpendicular diffusion in turbulent magnetic field, where a three-dimensional (3D) isotropic turbulence model is used in this paper. The obtained perpendicular diffusion at different particle energies is compared with that of the nonlinear guiding center (NLGC) theory. It is found that the NLGC theory is consistent with test particle simulations when the particle energies are small. However, the difference between the NLGC theory and test particle simulations tends to increase when the particle energy is sufficiently large, and the threshold is related to the turbulence bend-over length. In the NLGC theory, the gyrocenter of a charged particle is assumed to follow the magnetic field line. Therefore, when the particle has sufficiently large energy, its gyroradius will be larger than the turbulence bend-over length. Then the particle can cross the magnetic field lines, and the difference between the test particle simulations and NLGC theory occurs.; A test particle code is employed to explore the dynamics of charged particles and perpendicular diffusion in turbulent magnetic field, where a three-dimensional (3D) isotropic turbulence model is used in this paper. The obtained perpendicular diffusion at different particle energies is compared with that of the nonlinear guiding center (NLGC) theory. It is found that the NLGC theory is consistent with test particle simulations when the particle energies are small. However, the difference between the NLGC theory and test particle simulations tends to increase when the particle energy is sufficiently large, and the threshold is related to the turbulence bend-over length. In the NLGC theory, the gyrocenter of a charged particle is assumed to follow the magnetic field line. Therefore, when the particle has sufficiently large energy, its gyroradius will be larger than the turbulence bend-over length. Then the particle can cross the magnetic field lines, and the difference between the test particle simulations and NLGC theory occurs.
Indexed BySCI
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/122/3279
Collection空间科学部
Corresponding AuthorLu, QM (reprint author), Univ Sci & Technol China, CAS Key Lab Basic Plasma Phys, Dept Geophys & Planetary Sci, Hefei 230026, Peoples R China.
Recommended Citation
GB/T 7714
Gao, Xinliang,Lu, Quanming,Wang, Shui,et al. Dynamics of charged particles and perpendicular diffusion in turbulent magnetic field[J]. ASTROPHYSICS AND SPACE SCIENCE,2011,335(2):399-403.
APA Gao, Xinliang,Lu, Quanming,Wang, Shui,&Lu, QM .(2011).Dynamics of charged particles and perpendicular diffusion in turbulent magnetic field.ASTROPHYSICS AND SPACE SCIENCE,335(2),399-403.
MLA Gao, Xinliang,et al."Dynamics of charged particles and perpendicular diffusion in turbulent magnetic field".ASTROPHYSICS AND SPACE SCIENCE 335.2(2011):399-403.
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