Generation of H/sup -/, D/sup -/ ions on composite surfaces with application to surface/plasma ion source systems

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We review some salient features of the experimental and theoretical data pertaining to hydrogen negative ion generation on minimum-work-function composite surfaces consisting of Cs/transition metal substrates. Cesium or hydrogen ion bombardment of a cesium-activated negatively-biased electrode exposed to a cesium-hydrogen discharge results in the release of hydrogen negative ions. These ions originate through desorbtion of hydrogen particles by incident cesium ions, desorbtion by incident hydrogen ions, and by backscattering of incident hydrogen. Each process is characterized by a specific energy and angular distribution. The calculation of ion formation in the crystal selvage region is discussed for different approximations to the ... continued below

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Pages: 23

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Hiskes, J.R.; Karo, A.M.; Wimmer, E.; Freeman, A.J. & Chubb, S.R. August 19, 1983.

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Description

We review some salient features of the experimental and theoretical data pertaining to hydrogen negative ion generation on minimum-work-function composite surfaces consisting of Cs/transition metal substrates. Cesium or hydrogen ion bombardment of a cesium-activated negatively-biased electrode exposed to a cesium-hydrogen discharge results in the release of hydrogen negative ions. These ions originate through desorbtion of hydrogen particles by incident cesium ions, desorbtion by incident hydrogen ions, and by backscattering of incident hydrogen. Each process is characterized by a specific energy and angular distribution. The calculation of ion formation in the crystal selvage region is discussed for different approximations to the surface potential. An ab initio, all-electron, local density functional model for the composite surface electronics is discussed.

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Pages: 23

Notes

NTIS, PC A02/MF A01.

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  • American Vacuum Society meeting, Boston, MA, USA, 1 Nov 1983

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  • Other: DE84004814
  • Report No.: UCRL-89726
  • Report No.: CONF-831171-18
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 5458873
  • Archival Resource Key: ark:/67531/metadc1066593

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Office of Scientific & Technical Information Technical Reports

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  • August 19, 1983

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  • Feb. 4, 2018, 10:51 a.m.

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  • March 28, 2018, 12:44 p.m.

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Hiskes, J.R.; Karo, A.M.; Wimmer, E.; Freeman, A.J. & Chubb, S.R. Generation of H/sup -/, D/sup -/ ions on composite surfaces with application to surface/plasma ion source systems, article, August 19, 1983; United States. (digital.library.unt.edu/ark:/67531/metadc1066593/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.