Physics of Open-Field Line Plasmas 4. Formation of Electrostatic Potential in a Tandem Mirror

Abstract

The formation of electrostatic potential in a tandem mirror is reviewed. The plug potential and thermal barrier potential formations are first presented. The continuous potential profile across the mirror throat and the plug is discussed, which is required to avoid the formation of a sheath potential. The neoclassical radial transport is shown finally in order to calculate the potential radial profile in the central cell of a tandem mirror with finite endplate resistance.