H- Enhancement Process in a Multicusp Ion Source Operated with a Barium Insert Structure

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It has been demonstrated that the H{sup -} output current from a small multicusp source can be substantially enhanced if the hydrogen plasma is seeded with barium. Operating with a barium washer insert at the extraction aperture, it is found that the extractable H{sup -} current is increased by a factor of three if the insert bias potential is optimized. By use of a mixture of xenon and hydrogen gas, it is further demonstrated that the positive hydrogen ions are responsible for the observed H{sup -} enhancement.

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Leung, K.N.; Van Os, C.F.A. & Kunkel, W.B. May 1, 1990.

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It has been demonstrated that the H{sup -} output current from a small multicusp source can be substantially enhanced if the hydrogen plasma is seeded with barium. Operating with a barium washer insert at the extraction aperture, it is found that the extractable H{sup -} current is increased by a factor of three if the insert bias potential is optimized. By use of a mixture of xenon and hydrogen gas, it is further demonstrated that the positive hydrogen ions are responsible for the observed H{sup -} enhancement.

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16

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  • Journal Name: Physical Review Letters; Journal Volume: 58; Journal Issue: 14

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  • Report No.: LBL-29226
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 993483
  • Archival Resource Key: ark:/67531/metadc1013020

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1990

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 7, 2017, 7:18 p.m.

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Leung, K.N.; Van Os, C.F.A. & Kunkel, W.B. H- Enhancement Process in a Multicusp Ion Source Operated with a Barium Insert Structure, article, May 1, 1990; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1013020/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.