Physical concepts and structure of the TVD tokamak

The TDV tokamak is designed for the investigation of plasma with a highly-elongated cross-section, k≤4. The equilibrium of plasma is ensured by the currents through the excitation, equilibrium and shape windings. Another three windings are provided to control the position and shape of plasma filament. The stability of plasma is maintained by a system of passive loops placed in the vacuum chamber. The results of the TVD equilibrium modeling are presented. The plasma filament stability against vertical displacement and the stability of the cross-section shape are discussed. The MHD stability of the equilibrium configurations has been calculated numerically to determine the minimum possible values of q at the plasma boundary and the limiting values of β