The main features of the alpha particle heating, ignition and thermonuclear burn in a tokamak plasma with sawtooth oscillations are revealed. The sensitivity of the results to the various models of sawteeth and characteristics of the safety factor q(r) is investigated. Sawtooth oscillations are shown to have strong influence on ignition conditions and characteristics of the burn, provided the region of their localization is relatively large (about half plasma radius) and the time between crashes is small (less than the energy confinement time)
Variation of prompt alpha particle losses during sawtooth activity in Tokamaks