窒素クラスタ-イオンの平均比構成分子数の制御

概要

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In order to produce an intense beam of monoatomic negative hydrogen ions from a beam of accelerated positive hydrogen cluster ions, kinetic energy per constituent atom of the hydrogen cluster ions 0.5-1.0 keV is most suitable. For an acceleration voltage of 1 MV, specific sizes of the hydrogen cluster ions should be 103 atoms/unit charge. However, the large equivalent current of a beam of cluster ions has the tendency to make the specific sizes much larger than the above value. Therefore, the specific sizes must be controlled to the value. A fundamental study of controlling the mean specific size of nitrogen cluster ions has been carried out and the initial mean specific size 3×105 molecules/unit charge was reduced to 103-104 molecules/unit charge by multiple ionization of the cluster ions.
社団法人プラズマ・核融合学会の論文