Influence of neutral pressure on instability enhanced friction and ion velocities at the sheath edge of two-ion-species plasmas
Abstract
The Instability Enhanced Friction theory [Baalrud et al., Phys. Rev. Lett. 103, 205002 (2009)] is extended to account for the influence of neutral pressure in predicting the flow speed of each ion species at the sheath edge of plasmas containing two ion species. Particle-in-cell simulations show that the theory accurately predicts both the neutral pressure cutoff of ion-ion two-stream instabilities and the ion flow speeds at the sheath edge as pressure is varied over several orders of magnitude. The simulations are used to directly calculate the instability-enhanced ion-ion friction force. Finally, at sufficiently high neutral pressure, the simulations also provide evidence for collisional modifications to the Bohm criterion
- Authors:
-
- Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
- Ecole Polytechnique, Palaiseau (France). Laboratoire de Physique des Plasmas; Sorbonne Univ., Paris (France)
- Publication Date:
- Research Org.:
- Univ. of Iowa, Iowa City, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1514856
- Alternate Identifier(s):
- OSTI ID: 1412617
- Grant/Contract Number:
- SC0016473
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 24; Journal Issue: 12; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Adrian, P. J., Baalrud, S. D., and Lafleur, T. Influence of neutral pressure on instability enhanced friction and ion velocities at the sheath edge of two-ion-species plasmas. United States: N. p., 2017.
Web. doi:10.1063/1.4986239.
Adrian, P. J., Baalrud, S. D., & Lafleur, T. Influence of neutral pressure on instability enhanced friction and ion velocities at the sheath edge of two-ion-species plasmas. United States. https://doi.org/10.1063/1.4986239
Adrian, P. J., Baalrud, S. D., and Lafleur, T. Mon .
"Influence of neutral pressure on instability enhanced friction and ion velocities at the sheath edge of two-ion-species plasmas". United States. https://doi.org/10.1063/1.4986239. https://www.osti.gov/servlets/purl/1514856.
@article{osti_1514856,
title = {Influence of neutral pressure on instability enhanced friction and ion velocities at the sheath edge of two-ion-species plasmas},
author = {Adrian, P. J. and Baalrud, S. D. and Lafleur, T.},
abstractNote = {The Instability Enhanced Friction theory [Baalrud et al., Phys. Rev. Lett. 103, 205002 (2009)] is extended to account for the influence of neutral pressure in predicting the flow speed of each ion species at the sheath edge of plasmas containing two ion species. Particle-in-cell simulations show that the theory accurately predicts both the neutral pressure cutoff of ion-ion two-stream instabilities and the ion flow speeds at the sheath edge as pressure is varied over several orders of magnitude. The simulations are used to directly calculate the instability-enhanced ion-ion friction force. Finally, at sufficiently high neutral pressure, the simulations also provide evidence for collisional modifications to the Bohm criterion},
doi = {10.1063/1.4986239},
journal = {Physics of Plasmas},
number = 12,
volume = 24,
place = {United States},
year = {Mon Dec 11 00:00:00 EST 2017},
month = {Mon Dec 11 00:00:00 EST 2017}
}
Web of Science
Figures / Tables:
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