Laser Absorption Spectroscopy for Diagnostics of a Neutral Helium Beam

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概要

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• The density resolution of a measurement system using laser absorption spectroscopy is evaluated in order to diagnose a fraction of metastable helium atoms (2 3S1) in a neutral helium beam. Experiments performed in a hollow cathode device show that the density resolution of the present system is about 5 × 1013 m-3 for a 1 m absorption length. Optimization of absorption scheme and improvements of signal detection are suggested, which shows that laser absorption spectroscopy is a promising diagnostic method for a neutral helium beam.

• 社団法人 プラズマ・核融合学会の論文

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

• SHINTO Katsuhiro

  Tohoku University, Sendai, Miyagi 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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