P

p dn

"3 dp

£apyhy

is the tensor coefficient of diffusion. The first term on the right hand side of Eq. 2.11.31 corresponds to isotropic diffusion in absence of the regular magnetic field ( rL ^^ ). The second term is related to a diffusion stream of particles along the direction of the regular field. The third term determines the presence of a stream of particles normal to the regular magnetic field and the gradient of particle density. Using Eq. 2.11.30 we obtain from Eq. 2.11.24 the equation of anisotropic diffusion for particle density n(r, p, t) :

dt dra drp dr 3 dp

Let us solve the Eq. 2.11.26 relative to the tensor Lap. For this purpose determine the tensor G^vjk satisfying the relation

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