Analogy between Turbulent Transfer in Velocity Space and Plasma Collisional Transport in Real Space

Abstract

We point out an analogy between the plasma transport across a magnetic field due to ion-ion collisions and a model for transport of momentum in velocity space in the presence of plasma fluctuations of small amplitudes. A model of this kind, relying on the trapping of particles in plasma waves, may be proposed as an explanation of the observed lack of runaway electrons in confined plasmas on which relatively strong electric fields are applied.