Stabilization of Flute Instability by High Frequency Field

概要

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The effects of external inhomogeneous high-frequency field on the flute instability is studied theoretically from a point of view of non-linear particle interaction instead of an approach using a time averaged quasi-static potential or the Mathieu stability diagram. In this paper, it is assumed that the electric field component of the high-frequency field is perpendicular to the steady state confining magnetic field. It turns out that the hf field can compensate the perturbation of the flute instability with the aid of the ion drift induced by the field. The results appear to show that this field has the stabilizing effect in case that ω_0>ω_<ci> and has the exciting effect in case that ω_0<ω_<ci>, provided that the hf intensity increases with distance outwardly from the plasma, where ω_0 is the hf field frequency and ω_<ci> is the ion cyclotron frequency.
社団法人日本物理学会の論文
1975-09-15