Effects of a Magnetic Field on Electron Probe Currents

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概要

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• An experimental study is presented of the electron saturation currents arriving at a plane probe situated in a plasma in a magnetic field. Ratios of the electron saturation current collected by a disc-shaped probe parallel and perpendicular to the magnetic field were measured with two probes. Many measurements showed that these ratios decrease slowly with increasing ψ_e=ω_eτ_e and that the curves moved to an increasing ψ_e range as the gas pressure was decreased, indicating that electrons were flowing to the probe by diffusion. Ratios of I_<e⊥> and I_<e∥> to the electron probe current in no magnetic field (I_<eo>) were also measured. Among these three curves the curve of I_<e⊥>/I_<e∥> exhibits the most slow decrease, and the curve of I_<e⊥>/I_<eo> exhibits the sharpest decrease at the same gas pressure; i. e., with increasing magnetic field. It seems clear that the effect of the magnetic field on the electron diffusion is the most important factor, as far as electron collection is assumed to be controlled by the need for the compensation by diffusion of the electrons depleted by the probe.

• 核融合科学研究所の論文

著者

• Sugawara Minoru

  Research Information Center Institute Of Plasma Physics Nagoya University:permanently At Technical L

• HATTA Yoshisuke

  Research Information center, Institute of Plasma Physics, Nagoya University

• Hatta Yoshisuke

  Research Information Center Institute Of Plasma Physics Nagoya University:permanently At Department

関連論文

• Effects of a Magnetic Field on Electron Probe Currents

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