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(THP2/27) Modelling of Ripple Loss of Partially Thermalized Charged Fusion Products in TFTR

   
V. A. Yavorskij ¹, S. Zweben ², V. Ya. Goloborod'ko ¹, J. W. Edenstrasser ³, S. N. Reznik ¹, R. B. White ^2
 
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 $D^{sb} = 10^2--10^3 cm s^{-1}$ 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.

 

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