Comment on 'Cosmic ray diffusion: Detailed investigation of a recent model' [Phys. Plasmas 18, 082305 (2011)]

Shalchi, A.
November 2011
Physics of Plasmas;Nov2011, Vol. 18 Issue 11, p114701
Academic Journal
An improved theory for diffusion of energetic particles across the mean magnetic field has been developed recently. Lerche and Tautz [Phys. Plasmas 18, 082305 (2011)] have revisited the latter theory. They have proposed a different set of mathematical steps and derived a nonlinear integral equation which, according to them, deviates considerably from previous expressions. It is the purpose of the present paper to demonstrate that the latter statement is incorrect. The equation of Lerche and Tautz is very close to the original equation. Furthermore, it is shown that the original equation is even more accurate.


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