Effect of nickel grid parameters on production of negative hydrogen ions

Oohara, W.; Yokoyama, Hiroshi; Takeda, Toshiaki; Maetani, Y.; Takeda, Takashi; Kawata, Keisuke

doi:10.1063/1.4886149

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…13 In order to avoid the above problems, grids made of a single metal were used for the production of negative ions, and the production quantity of ions was evaluated by the extraction currents. 14,15 Nickel dissociates hydrogen molecules and chemiadsorb hydrogen atoms, but copper…”

Section: Introductionmentioning

confidence: 99%

Production of negative hydrogen ions on metal grids

et al. 2015

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Negative hydrogen ions are produced on a nickel grid with positive-ion irradiation. In order to investigate the production mechanism, a copper grid without the chemisorption of hydrogen atoms and positive helium ions without negative ionization are used for comparison. Positive hydrogen ions reflected on the metal surface obtain two electrons from the surface and become negatively ionized. It is found that the production yield of negative ions by desorption ionization of chemisorbed hydrogen atoms seems to be small, and the production is a minor mechanism. V C 2015 AIP Publishing LLC. [http://dx.

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Section: Introductionmentioning

confidence: 99%

Production of negative hydrogen ions on metal grids

et al. 2015

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Hydrogen ionic plasma generated using Al plasma grid

et al. 2016

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Negative hydrogen ions are produced in the apertures of a plasma grid made of aluminum under the irradiation of positive ions, generating an ionic plasma consisting of positive and negative ions. The saturation current ratio obtained using a Langmuir probe reflects the existence ratio of electrons and is found to increase in connection with the diffusion of the ionic plasma. The local increment of the current ratio suggests the collapse of negative ions and the replacement of detached electrons.

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