Diffusion and radiation in magnetized collisionless plasmas with small-scale Whistler turbulence

摘要

Magnetized high-energy-density plasmas can often have strong electromagnetic fluctuations whose correlation scale is smaller than the electron Larmor radius. Radiation from the electrons in such plasmas which markedly differs from both synchrotron and cyclotron radiation is tightly related to their energy and pitch -angle diffusion. In this paper, we present a comprehensive theoretical and numerical study of particle transport in cold, 'small-scale' Whistler -mode turbulence and its relation to the spectra of radiation simultaneously produced by these particles. We emphasize that this relation is a superb diagnostic tool of laboratory, astrophysical, interplanetary and solar plasmas with a mean magnetic field and strong small-scale turbulence.