Dynamics of charged particles and perpendicular diffusion in turbulent magnetic field

	Dynamics of charged particles and perpendicular diffusion in turbulent magnetic field
	Gao, Xinliang; Lu, Quanming; Wang, Shui
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2011
卷号	335 期号:2 页码:399-403
关键词	Turbulent magnetic field Perpendicular diffusion Test particle simulation Nonlinear guiding center theory
ISSN号	0004-640X
通讯作者	Lu, QM (reprint author), Univ Sci & Technol China, CAS Key Lab Basic Plasma Phys, Dept Geophys & Planetary Sci, Hefei 230026, Peoples R China.
中文摘要	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.
英文摘要	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.
学科主题	空间物理
收录类别	SCI
资助信息	National Science Foundation of China [40931053, 40725013, 40974081]; Specialized Research Fund for State Key Laboratories; Fundamental Research Funds for the Central Universities [WK2080000010]
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3279]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Gao, Xinliang,Lu, Quanming,Wang, Shui. 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.(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.