1. Fokker-Planck Equation for an Inverse-Square Force
2. or (b) H. Grad, Proc. 2nd Intern. Conf. Peaceful Uses Atomic Energy, Geneva,31, 263 (1958).
3. See H. Grad, reference 1 (b) for the precise form of these coefficients in this case.
4. One can also considerfto describe the behavior of a “marked” ion in a plasma in equilibrium. In the more usual case where a whole group of ions is injected or “marked,” our linearization amounts to ignoring the interaction between ions of this group as compared to the forces exerted by the plasma on the group as a whole. If one wants to include this mutual interaction, one has to take the values of ar and brs corresponding to a linear perturbation of the Maxwellian distribution.
5. Relaxation of a System of Particles with Coulomb Interactions