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- W2025132992 abstract "For the development of a high current heavy negative ion source, the production efficiency of the negative ions by Xe+ sputtering with cesium and electron detachment cross sections in xenon gas were measured. The maximum efficiency for Cu− was 12.1% and the single-electron detachment cross section was found to be of the order of 0.6–1.4 × 10−15 cm2 in the energy range of 5–50 keV. Based on the results of these fundamental experiments, a plasma-sputter-type heavy negative ion source has been constructed, in which the plasma was generated at a rf-frequency of 13.56 MHz. A total negative ion current of 2.5 mA was obtained without electrons from the source in dc operation, and the Cu− current was detected to be 91% of the total beam. The operation characteristics are described." @default.
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- W2025132992 date "1992-04-01" @default.
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- W2025132992 title "Measurement of negative‐ion‐production efficiencies and development of a dc operation sputter‐type negative ion source" @default.
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- W2025132992 doi "https://doi.org/10.1063/1.1142921" @default.
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