The collisional relaxation rate of kappa-distributed plasma with multiple components

Abstract

The kappa-distributed fully ionized plasma with collisional interaction is investigated.The Fokker-Planck equation with Rosenbluth potential is employed to describe such a physical system. The results show that the kappa distribution is not a stationary distribution unless the parameter kappa tends to infinity. The general expressions of collisional relaxation rate of multiple-component plasma with kappa distribution are derived and discussed in specific cases in details. For the purpose of visual illustration, we also give those results numerically in figures. All the results show that the parameter kappa plays a significant role in relaxation rate.

The collision frequencies in the plasmas with the power-law q-distributions in nonextensive statistics

“…The collision frequencies of a test particle in highly ionized plasma are applied to understand the particle losses in a mirror machine, the energy transfer of high-energy alphas to the background plasma and the phenomenon of runaway electrons [2]. The slowing down time and collisional relaxation rate based on the Fokker-Planck collisions with Rosenbluth potential were derived for the κ-distributed and highly ionized plasmas [19,20]. The Fokker-Planck equation provides a general formula to treat the changes that result from a succession of collision in the Coulomb long-range interactions.…”