|Título||Stochastic diffusion of ions due to a finite set of lower hybrid waves
Tozawa, Lucio Minoru
Ziebell, Luiz Fernando
|Abstract||In this paper we generalize the discussion on stochastic diffusion of energetic ions by lower hybrid waves by considering a case where a set of waves with similar frequencies is present in the system. In the particular case of a finite number of coherent waves, we show that the threshold for stochastic diffusion is reduced in comparison with the threshold in the one-wave case, and that the ensuing particle diffusion in velocity space occurs in periodic bursts along the time evolution. In the more general case of a set of waves with random phases, we have obtained even more efficient long-term diffusion in velocity space, for the same number of waves, although the initial diffusion rate can be smaller than in the case of coherent waves.
|Contido em||Physical review. E, Statistical, nonlinear, and soft matter physics. Vol. 66, no. 5 (Nov. 2002), 056409, 13 p.
|Tipo||Artigo de periódico
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