Cosmic Ray Momentum Diffusion in Magnetosonic versus Alfvenic Turbulent Fields

Details Cosmic Ray Momentum Diffusion in Magnetosonic versus Alfvenic Turbulent Fields Cosmic Ray Momentum Diffusion in Magnetosonic versus Alfvenic Turbulent Fields

1997-09-02

arxiv.org/abs/astro-ph/9709017v1

Astronomy and Astrophysics

Astrophysics

8 pages, LaTeX, Macro for A&A

Scientific paper

The acceleration of energetic particle transport in high amplitude magnetosonic and Alfvenic turbulence is considered using the method of Monte Carlo particle simulations, involving integration of particle equations of motion. We derive the momentum diffusion coefficient in the presence of anisotropic turbulent wave in the high-magnetized plasma, for a flat and Kolmogorov-type turbulence spectrum. We confirm the quasilinear result (Shlickeiser & Miller (1997) of enhanced values of the momentum diffusion coefficient due to transit-time resonance interaction in the presence of isotropic fast-mode waves as compared to the case of slab Alfvenic waves of the same amplitude. The relation of the momentum diffusion coefficient to the turbulence amplitude and anisotropy is investigated.

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