Evolution of Burning Fusion Plasma Density and alpha Particle Production in Approaching Ignition

摘要

The balance in between particle diffusion, reaction processes and particle injection from external sources of tritium and deuterium in a burning fusion plasma is studied analytically by means of coupled model equations. The diffusion processes are described by scaling terms approximating the associated diffusion operators in the coupled reaction-diffusion equations. From the results obtained for the particle densities the associated expressions describing the alpha particle production are constructed for simultaneous beam-thermal and thermal-thermal reactions. (ERA citation 12:044644)