Gyrokinetic applications in electron–positron and non-neutral plasmas

Workshop on Non - neutral Plasmas ∗

A summary of the Workshop on Non-neutral Plasmas, held in Boulder, Colorado, on July 29 through August 1, 1997, is given. This workshop provided an opportunity for the exchange of results and scientific information among the diverse areas of plasma physics, atomic physics, and chemistry, which use non-neutral plasmas.

Collisional transport in non-neutral plasmas*

Several recent experiments have measured collisional transport in non-neutral plasmas ~heat conduction, test particle diffusion, and viscosity! that is from 10 to 10 times larger than predicted by classical theory. New guiding center theories of collisional transport have been developed that agree with the measurements. The experiments operate in the guiding center regime rc!lD , where rc is th...

Collisionless relaxation in non-neutral plasmas.

A theoretical framework is presented which allows us to quantitatively predict the final stationary state achieved by a non-neutral plasma during a process of collisionless relaxation. As a specific application, the theory is used to study relaxation of charged-particle beams. It is shown that a fully matched beam relaxes to the Lynden-Bell distribution. However, when a mismatch is present and ...

Stability of highly asymmetric non-neutral plasmas

When non-neutral plasma columns are subject to azimuthally asymmetric electrostatic potentials, they deform into azimuthally asymmetric shapes. A typical asymmetric shape is shown in Fig. 1. The companion paper presents methods of predicting the form of these shapes. Here we analyze the shapes’ stability. Stability is normally studied through modal analysis, in which nonlinear equilibria are ca...

Kinetic Model of Plasmas and Neutral Particles for Fusion Applications