Properties of Nitrogen Plasmas Confined in Toroidal Walls of Copper and Quartz

For toroidal arc plasmas, the geometrical configuration, material and thickness of the discharge tube are of special importance not only for the cooling problem but also for the thermal and magnetogasdynamic behavior. In this paper, we present a new method for calculating the electromagnetic and dynamic quantities of a toroidal plasma, including the thermal properties of the confining arc wall. Results are given for a d. c. arc burning in a torus segment. The toroidal walls are made from quartz--or copper--segments with thin electrically isolating layers.