Plasma heating by highcurrent relativistic electron beams
Abstract
The process of electronbeam relaxation in a homogeneous isothermal plasma is examined for the case where the magnetic field is weak and Langmuir oscillations constitute the most unstable waves. Weakturbulence theory is used to evaluate the oscillation spectrum excited by the beam for beam angular spreads in excess of 15 deg and small beam/plasma density ratios, induced scattering of Langmuir oscillations by plasma ions is analyzed, and beam energy losses experienced in the interaction of the beam electrons with the threedimensional Langmuiroscillation spectrum are discussed. Effects of strong turbulence in a dense and in a collisionless plasma are considered, and excitation of the modulational instability in the presence of strong turbulence is studied. Equations are provided for assessing electronbeam plasma heating in the presence of moderate magnetic fields as well as for the case of a nonisothermal plasma.
 Publication:

Plasma Physics: Nonlinear Theory and Experiments
 Pub Date:
 1977
 Bibcode:
 1977ppnt.proc..284R
 Keywords:

 Electron Beams;
 Plasma Heating;
 Plasma Turbulence;
 PlasmaParticle Interactions;
 Relativistic Particles;
 Electron Energy;
 Electron Scattering;
 High Current;
 Magnetic Fields;
 Magnetohydrodynamic Stability;
 Plasma Oscillations;
 Plasmons;
 Turbulence Effects;
 Plasma Physics