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The influence of sawtooth oscillations on the neutron production in NBI heated tokamak plasmas

The simulation and analysis of neutron signals of plasmas heated by neutral beam injection (NBI) requires fast computer codes for evaluating non-thermal velocity distributions. In such calculations effects of sawtooth activity are usually neglected. In this comment, the consequences of such an approximation are discussed. The time-dependent bounce-averaged Fokker - Planck equation is solved numerically. The solution is used to calculate the effect of sawtooth activity on the time evolution of the fusion reactivity.