ダブルプラズマイオンシースにおける粒子のカオス的挙動

概要

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Dynamical behavior of ion current in the ion sheath of the separation grid in the double plasma devices is analyzed in terms of the equation of motion with the Child-Langmuir potential and the collisional damping term under the action of external oscillating electric field. Since the present model describes the forced oscillation system based on the non-automous differential equation, it characterizes the stochastic behavior of the dissipative nonlinear dynamical systems. The method of Poincare section of surface provides us the detailed information of the periodic orbits, region of the chaotic solutions and determines the structure of the bifurcation process associated with transition between the periodic orbits and the chaotic solutions. In the present analysis, construction of the model potential and specification of relevant parameters are tried to be consistent with the experimental situation, with the expectation to give reliable account for the experimental observation. At the same time, the present analysis explores the generic aspect of the dissipative chaotic systems such as the re-merging of the period doubling bifurcation and formation of bubbles in the Feigenbaum trees.
社団法人プラズマ・核融合学会の論文
2000-09-25