Ion beam formation in a low-pressure geometrically expanding argon plasma

  • C. S. Corr
    The Australian National University Space Plasma, Power, and Propulsion group, Research School of Physical Sciences and Engineering, , Canberra, Australia Capital Territory 0200, Australia
  • J. Zanger
    The Australian National University Space Plasma, Power, and Propulsion group, Research School of Physical Sciences and Engineering, , Canberra, Australia Capital Territory 0200, Australia
  • R. W. Boswell
    The Australian National University Space Plasma, Power, and Propulsion group, Research School of Physical Sciences and Engineering, , Canberra, Australia Capital Territory 0200, Australia
  • C. Charles
    The Australian National University Space Plasma, Power, and Propulsion group, Research School of Physical Sciences and Engineering, , Canberra, Australia Capital Territory 0200, Australia

書誌事項

公開日
2007-12-10
DOI
  • 10.1063/1.2823575
公開者
AIP Publishing

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説明

<jats:p>Supersonic ion beam formation has been observed in a geometrically expanding low-pressure inductively coupled argon plasma. It is found that the ion beam is only observed below 3mTorr and only when the discharge is operated in inductive mode. The geometrical expansion of the plasma induces density and potential gradients leading to the ion beam formation. The ion beam energy increases with decreasing source tube radius. The results show that ion beam formation can be achieved by geometrical expansion alone and that the ion beam energy depends on the ratio of the cross-sectional area of the source and expansion region.</jats:p>

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