磁場中陽光柱のHelical Instabilityの実験

概要

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The positive column of a D.C. dicharge becomes unstable when a longitudinal magnetic field exceeds a critical value Bc. The measurements have been extened, with emphasis on the properties and growth of the instability, to permit a quantitative comparison between experiment and the theory of Kadomtsev&Nedospasov. The oscillating floating potentials were observed through the Langmuir's probes, of which tips were spaced at the tube will. The properties of the helical state have been measured in He gas as functions of magnetic field and discharge current. The frequency and the wave length are in fairly good agreement with the predictions made by the theory of kadomtsev & Nedospasov.
社団法人プラズマ・核融合学会の論文