プラズマ境界領域に生成する一次元的電位構造

概要

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A potential profile has been obtained in the boundary layer by contract between different space potential plasmas. Experiments have been carried out by using a triple plasma device (TPD) with filament plasma sources. The TPD consists of two plasma sources and a target space, which are isolated each other. By analyzing experimental results quantitatively, a model of charged particle flow is constructed. From this model, a following relation is obtained, ⊿V ≃T_<eB>(N+M^<1/2>)^<-2>, where ⊿V, T_<eB>, N, and M are the potential gap, the electron mean energy on the high potential side, the ratio between electron densities on both sides of potential profile, and the mass ratio of ion to electron, respectively. The experimental results have good agreements with this relation. Thus it is suggested that the potential gap is sustained by the charged particle flow described in our model. It is also found that the potential structure obtained in our experiment can be regarded as the double layer.
東海大学の論文