scholarly journals The Fokker-Planck Coefficient for Pitch-Angle Scattering of Cosmic Rays

1974 ◽  
Vol 190 ◽  
pp. 417 ◽  
Author(s):  
L. A. Fisk ◽  
M. L. Goldstein ◽  
A. J. Klimas ◽  
G. Sandri
Keyword(s):  
Cosmic Rays ◽  
Pitch Angle ◽  
Angle Scattering ◽  
Fokker Planck

A numerical study of the pitch-angle scattering of cosmic rays

1982 ◽  
Vol 254 ◽  
pp. 398 ◽  
Author(s):  
J. Kota ◽  
J. R. Jokipii ◽  
D. A. Kopriva ◽  
T. I. Gombosi ◽  
A. J. Owens ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Pitch Angle ◽  
Numerical Study ◽  
Angle Scattering

scholarly journals Diffusion of Cosmic Rays in MHD Turbulence with Magnetic Mirrors

2021 ◽  
Vol 923 (1) ◽  
pp. 53
Author(s):  
Alex Lazarian ◽  
Siyao Xu
Keyword(s):  
Cosmic Rays ◽  
Diffusion Coefficients ◽  
Pitch Angle ◽  
Mirror Reflection ◽  
Mhd Turbulence ◽  
Magnetic Mirrors ◽  
Parallel Diffusion ◽  
Angle Scattering ◽  
Small Pitch ◽  
New Type

Abstract As the fundamental physical process with many astrophysical implications, the diffusion of cosmic rays (CRs) is determined by their interaction with magnetohydrodynamic (MHD) turbulence. We consider the magnetic mirroring effect arising from MHD turbulence on the diffusion of CRs. Due to the intrinsic superdiffusion of turbulent magnetic fields, CRs with large pitch angles that undergo mirror reflection, i.e., bouncing CRs, are not trapped between magnetic mirrors, but move diffusively along the turbulent magnetic field, leading to a new type of parallel diffusion, i.e., mirror diffusion. This mirror diffusion is in general slower than the diffusion of nonbouncing CRs with small pitch angles that undergo gyroresonant scattering. The critical pitch angle at the balance between magnetic mirroring and pitch-angle scattering is important for determining the diffusion coefficients of both bouncing and nonbouncing CRs and their scalings with the CR energy. We find nonuniversal energy scalings of diffusion coefficients, depending on the properties of MHD turbulence.

Nongyroresonant Pitch Angle Scattering

1999 ◽  
Vol 518 (2) ◽  
pp. 974-984 ◽  
Author(s):  
B. R. Ragot
Keyword(s):  
Pitch Angle ◽  
Angle Scattering
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