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V. A. Yavorskij1, S. Zweben2,
V. Ya. Goloborod'ko1,
J. W. Edenstrasser3, S. N. Reznik1,
R. B. White2
1 Institute for Nuclear Research, Kiev, Ukraine
2 Princeton Plasma Physics Laboratory, Princeton University, Princeton,
New Jersey, United States of America
3 Institute for Theoretical Physics, University of Innsbruck, Innsbruck,
Austria
Abstract. The results of the numerical modelling of the ripple loss of
partially thermalized charged fusion products in TFTR are presented. The
measured loss of partially thermalized alphas is explained at least
qualitatively by a ripple transport mechanism that includes collisional radial
diffusion of toroidally trapped particles with
Dsb = 102 - - 103cms- 1
and stochastic ripple diffusion. The carried out Fokker-Planck simulations of
the alpha loss dependencies on the plasma current and on the fusion power as
well as the radial and poloidal dependencies of the fusion product losses are
shown to agree satisfactorily with the corresponding measurements and
Monte-Carlo calculations.
IAEA 2001
