21st Fusion Energy Conference, 13-21 de Outubro, Chengdu, China
Integrated Modelling of Sawtooth Oscillations in Tokamak Plasmas
Porcelli, F., G. Bateman, L.-G. Eriksson, D. Grasso, J. Graves, T. Hellsten, G. Huysmans,T. Johnson, A. Kritz, H. Lütjens, M.-L. Mayoral, M.F. Nave, C. N. Nguyen, A. Pankin, Perona, S. D. Pinches, P. Sandquist, O. Sauter, S. Sharapov, I. Voitsekhovich, F. Zonca e os contributos JET-EFDA
Resumo
The present understanding of sawtooth oscillations in tokamak plasmas is discussed. Predictive sawtooth
modelling requires the integration of various aspects of tokamak physics, including transport, heating
and current drive, MHD stability, kinetic effects and fast particle dynamics. In particular, fast particle
distributions must be obtained self-consistently, taking into account auxiliary heating, fusion-produced
alpha particles and the redistribution of fast ions due to sawtooth crashes and the relevant fast particle
driven instabilities. The model proposed here is shown to be in fair quantitative agreement with
experimental data and to provide a useful tool for the definition of a possible strategy for sawtooth
control in fusion burning plasmas.