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Title: 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:
 [1];  [1];  [2]
+ Show Author Affiliations
  1. Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
  2. 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.
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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
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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.
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@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}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1063/1.4986239
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Cited by: 6 works
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Figures / Tables:

FIG. 1 FIG. 1: Cross sections for various collisions in a He+-Xe+ plasma used in our PIC-MCC simulations versus center-of-mass (COM) energy (E$COM$ = 1/2 m$R$v$^{2}_{R}$). Elastic cross sections are in black, labeled (e). Charge exchange cross sections are in red, labeled (cx).
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