Without Abstract

The theoretical analysis considers a single species of impurity ions with a specified charge. The mass of these ions is assumed to be much larger than the mass of the heavy ions. Radial profiles of the plasma velocity, density, and temperature for the case of heating by a high-power relativistic beam are given. Impurity effects are shown. (MOW)

The structure of a collisionless shock wave at the front of which ion-acoustic turbulence is excited is investigated. On the basis of the theory of anomalous resistance, equations are obtained for the oscillational spectrum and the particle distribution function in the plasma which, when known, make it possible to determine the magnetic field profile, density, and other macroscopic characteristics of the shock wave. The possibility of comparing theoretical predictions with experimental results from light scattering at the shock front is discussed.

A study is made of the possibility of confining a thermonuclear plasma with temperature T ∼ 104 eV and density n ∼ 1018 cm-3, not by magnetic field pressure, but by hard walls of a chamber (nonmagnetic containment). This method of plasma containment has some specific features: the occurrence of plasma flow, formation of a dense layer at the wall, increased importance of radiative losses from the plasma, and more. A numerical solution of the plasma-transport equations is used to investigate the influence of these features on the energy lifetime of the plasma. The results indicate that the additional energy losses by the plasma are not catastrophically large, and, in principle, nonmagnetic containment of a dense plasma is possible.