Article ID Journal Published Year Pages File Type
1861129 Physics Letters A 2010 8 Pages PDF
Abstract
The scattering of energetic particles in stochastic magnetic fields cannot be described using quasi-linear theories except for simple turbulence geometries. A promising candidate for the analytical description of such scattering processes is the second-order quasi-linear theory [A. Shalchi, Phys. Plasmas 12 (2005) 052905]. For isotropic turbulence, the theory has been evaluated only semi-numerically but the results are in good agreement with numerical simulations [R.C. Tautz, A. Shalchi, R. Schlickeiser, Astrophys. J. 685 (2008) L165]. Here, using well-established methods from the summation of Bessel functions, the equation for the pitch-angle Fokker-Planck coefficient is reduced to a few single and double integrals that are left to numerical evaluation. In doing so, the evaluation of transport parameters is facilitated, thus enabling one to conduct parameter studies.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Physics and Astronomy (General)
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