On the stabilization of overheating instability of a thermonuclear reactor-tokamak

Stationary state of the thermonuclear deuterium-tritium reaction in the reactor-tokamak can be temperature instable is concernued. Physical nature of the given instability is associated with different dependences of energetic life ime and power of thermonuclear energy release on plasma temperature. It is revealed that realization of steady-state self-sustaining D-T-reaction is possible at controlled pellets fueling of the central part of plasma filament. Physical mechanism ensuring thermonuclear reaction is associated with overheating of the central part of the filament and increase of the threshold value p, while go into the stationary mode is conditioned by rather small effective lifetime of plasma in the central region. The problem of sta bilizing overheatin.g instability of the reactor-tokamak is considered. If we assume that the power of thermonuclear energy release Q is Q approximately Tsup(p) then the parameter of exponent p drops with growth of plasma temperature and at T >= 30 keV it turns to be less than one. In this case overheating instability does not take place