Abstract Details
Abstracts
Author: ALESSANDRO CARDINALI
Requested Type: Poster
Submitted: 2018-03-01 18:20:09
Co-authors: C. Castaldo, R. Ricci, F. Santini
Contact Info:
ENEA
VIA E FERMI 45
FRASCATI, ROME 00044
ITALY
Abstract Text:
In a reactor plasma (like ITER or DEMO) a large fraction of the ion population (the continuously born alpha-particle, and/or the Neutral Beam Injection (NBI) injected ions) is characterized by a non-thermal distribution function. The mutual interaction between the RF in the range of the Lower Hybrid frequency [1,2] and this ion population is reformulated by considering the quasilinear approach for each species separately, including the electrons/ions thermal background. In this study both the propagation (related to the Hermitian part of the dielectric tensor) and the absorption (related to the anti-Hermitian part) are considered by including the ion distribution function, solution of the Fokker-Planck equation, which describes the collisional dynamics of the particles, including the effects of frictional slowing down, energy diffusion, and pitch-angle scattering. Analytical solutions of the Fokker-Planck equation at the steady state are included in the calculation of the dielectric tensor. Analytical ray-tracing including the damping rate equation along the trajectory can be solved by iterating with the 1D Fokker-Planck solution. The interaction of the LH wave with α-particles, beam-ions and thermal ions and electrons can be accounted self-consistently and the reduction of the Current Drive efficiency due to plasma-wave interaction can be evaluated
Comments:
Plasma Production and Heating