RELATIONSHIP BETWEEN CURRENT DENSITY AND MASS DENSITY FOR OHMIC TOKAMAK PLASMAS

Abstract

The relation between current density and mass density in the plasma has been derived based on the assumption that the magnetic entropy is constant in time. Over the entire range of quasi-stationary ohmic conditions, it is obtained [Formula: see text]. Here j0 and ρ0 are the central values of j and ρ with j0 ≈ cB/2πR0 (this corresponds to a value q ≈ 1 of the safety factor near the minor axis).