Negative ion formation at a barium surface in contact with a hydrogen plasma

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  • C. F. A. van Os
    Association EURATOM-FOM, FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
  • R. M. A. Heeren
    Association EURATOM-FOM, FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
  • P. W. van Amersfoort
    Association EURATOM-FOM, FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands

説明

<jats:p>Measurements on the production of negative hydrogen ions at a barium surface, in contact with a hydrogen plasma, are presented and discussed. In spite of the high work function of barium compared to more conventional cesiated converter surfaces, considerable yields of negative ions were produced. Conversion efficiencies up to 4% were achieved. No negative barium ions were observed.</jats:p>

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