The Phenomenon of Electron Re-heating in Nitrogen Plasma Jet

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  • 窒素プラズマジェット中における電子の再加熱現象
  • チッソ プラズマ ジェットチュウ ニ オケル デンシ ノ サイ カネツ ゲンシ

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Abstract

The electron temperature and electron density axial profiles in nitrogen plasma jet have been measured using the electrostatic double probe method. The electron temperature (_??_1.5-0.5eV) once decreases along the flow axis and increases again in downstream region. The behavior of the vibrationally excited nitrogen molecules which may play important role in this electron re-heating process were also studied by the spectroscopic measurement and the theoretical calculations. All the results show that the electron re-heating phenomenon can be explained by the super-elastic collision of the electron with the vibrationally excited nitrogen molecules which are formed by the three-body conversion of the nitrogen free atoms supplied from the arc discharge plasma region.

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