Ar+ and Xe+ Velocities near the Presheath-Sheath Boundary in an Ar/Xe Discharge

J. T. Gudmundsson and M. A. Lieberman
Phys. Rev. Lett. 107, 045002 – Published 18 July 2011

Abstract

The velocities of Ar+ and Xe+ ions near the presheath-sheath boundary in an Ar/Xe discharge are studied by particle-in-cell Monte Carlo simulation. For a pure argon discharge the argon ion has almost the same velocity profile as it does in the mixture of argon and xenon. Similarly, for a xenon discharge the xenon ion has almost the same velocity profile as it does in the mixture of argon and xenon. The ion speed at the sheath-presheath boundary is the same for an ion in a pure argon or xenon discharge and for the same ion in a mixture of argon and xenon. We conclude that, in our simulation, each ion reaches its own Bohm speed at the presheath-sheath interface.

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  • Received 23 February 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.045002

© 2011 American Physical Society

Authors & Affiliations

J. T. Gudmundsson1,2,3 and M. A. Lieberman1

  • 1Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA
  • 2University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
  • 3Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland

Comments & Replies

Comment on “Ar+ and Xe+ Velocities near the Presheath-Sheath Boundary in an Ar/Xe Discharge”

N. Hershkowitz, G. D. Severn, S. D. Baalrud, C. C. Hegna, and J. D. Callen
Phys. Rev. Lett. 108, 139501 (2012)

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Vol. 107, Iss. 4 — 22 July 2011

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