Charge-Exchanged Beam Measurement by Using a Grid-Biased Faraday Cup

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概要

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• A method for neutral beam measurement by using a Faraday cup is proposed in this paper. The method enables us to detect neutral beams by controlling secondary electrons by using a biasing grid in front of the Faraday cup. A procedure is also proposed for in situ determination of the secondary electron emission coefficient of the Faraday cup. Experimental results show that appropriate emission coefficients are determined for helium beams with energies of 2-10 keV. The neutral flux charge-exchanged from a helium ion beam passing through a helium gas is also measured. Saturation of the neutral flux is observed above the pressure expected from the solution of a rate equation. The method is promising for neutral beam measurement, especially for small current-neutral beams.

著者

• KITAJIMA Sumio

  Tohoku University, Sendai, Miyagi 980-8579, Japan

• SASAO Mamiko

  Tohoku University, Sendai, Miyagi 980-8579, Japan

• OKAMOTO Atsushi

  Tohoku University, Sendai, Miyagi 980-8579, Japan

• ISONO Takehiro

  Tohoku University, Sendai, Miyagi 980-8579, Japan

• NISHIUCHI Tsuguhiro

  Tohoku University, Sendai 980-8579, Japan

• TAKAHASHI Hiroyuki

  Tohoku University, Sendai 980-8579, Japan

• ISONO Takehiro

  Tohoku University, Sendai 980-8579, Japan

• KITAJIMA Sumio

  Tohoku University, Sendai 980-8579, Japan

関連論文

• Charge-Exchanged Beam Measurement by Using a Grid-Biased Faraday Cup
• Development of a helicon plasma source for the measurement of He* Component in a He0 Beam
• Laser Absorption Spectroscopy for Diagnostics of a Neutral Helium Beam

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