EFFECT OF SAWTEETH ON ALPHA-POWER DEPOSITION AND IGNITION IN TOKAMAKS

The main features of the alpha particle heating, ignition and thermonu clear 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 o scillations are shown to have strong influence on ignition conditions and characteristics of the burn, provided the region of their localiza tion is relatively large (about half plasma radius) and the time betwe en crashes is small (less than the energy confinement time).