Determination of metastable fraction in an ion beam extracted from ECR plasma
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概要
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The fraction of metastable-state Ar^<2+>(3p^4 ^1D) ions in Ar^<2+> beam has been determined by an optical attenuation method (OAM) combined with the conventional beam attenuation method. The present OAM is based on observation of spatial decay of specified emission line intensities arising from charge-changed ions, along the beam axis in a target gas cell. The validity of the OAM is discussed in detail. The cross sections for one-electron capture by the ground-state Ar^<2+>(^3p) ions, σ_<21>, and by the metastable-state Ar^<2+>(^1D) ions, σ^*_<21>, from Na have been measured independently by the OAM. Both the cross sections are of the order of 10^<-14>cm^2 and σ^*_<21> is about 1.3 times as large as σ_<21> at the collision energy of 1.5 keV.
- 核融合科学研究所の論文
著者
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OHTANI Shunsuke
The University of Electro-Communications
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MATSUMOTO Atsushi
Institute of Plasma Physics,Nagoya University
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MATSUMOTO Atsushi
National Institute for Fusion Science
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Ohtani Shunsuke
Institute For Laser Science University Of Electro-communications
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Shunsuke Ohtani
Cold Trapped Ions Project Icorp Japan Science And Technology Corporation (jst)
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Iwai Tsuruji
Department Of Liberal Arst Kansai Medical University
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Ohtani Shunsuke
Cold Trapped Ion Project Japan Science & Technology Cooperation
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