Long-Lived Vortex Structures in Collisional Pure and Gas-Discharge Nonneutral Electron Plasmas

TL;DR

This paper investigates the stability, interactions, and long-term behavior of vortex structures in nonneutral electron plasmas, providing insights into confinement and transport mechanisms in both pure and gas-discharge conditions.

Contribution

It offers a detailed analysis of vortex stability and dynamics in nonneutral plasmas, including mechanisms for long confinement and sheath collapse at high pressures.

Findings

Long-lived vortex structures can be stable over extended periods.

Vortex interactions influence electron transport along and across magnetic fields.

Sheath collapse occurs at high neutral gas pressures.

Abstract

The analysis of experimental investigations of equilibrium, interaction and dynamics of vortex structures in pure electron and gas-discharge electron nonneutral plasmas during the time much more than the electron-neutral collision time has been carried out. The problem of long confinement of the column of pure electron plasma in Penning-Malmberg trap is considered. The mechanism of stability of long-lived vortex structure in gas-discharge nonneutral electron plasma is investigated. The collapse of electron sheath in gas-discharge nonneutral electron plasma in Penning cell at high pressures of neutral gas is described. The interaction between the stable vortex structure and the annular electron sheath, and the action of vortex structures on the transport of electrons along and across the magnetic field are discussed.