Turbulent current drive mechanisms
Abstract
Mechanisms through which plasma microturbulence can drive a mean electron plasma current are derived. The efficiency through which these turbulent contributions can drive deviations from neoclassical predictions of the electron current profile is computed by employing a linearized Coulomb collision operator. It is found that a nondiffusive contribution to the electron momentum flux as well as an anomalous electronion momentum exchange term provide the most efficient means through which turbulence can modify the mean electron current for the cases considered. Such turbulent contributions appear as an effective EMF within Ohm’s law, and hence provide an ideal means for driving deviations from neoclassical predictions.
 Authors:

 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Publication Date:
 Research Org.:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC). Fusion Energy Sciences (FES) (SC24); USDOE
 OSTI Identifier:
 1375883
 Alternate Identifier(s):
 OSTI ID: 1372948
 Report Number(s):
 LAUR1724073
Journal ID: ISSN 1070664X
 Grant/Contract Number:
 AC5206NA25396
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 24; Journal Issue: 8; Journal ID: ISSN 1070664X
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Magnetic Fusion Energy
Citation Formats
McDevitt, Christopher J., Tang, XianZhu, and Guo, Zehua. Turbulent current drive mechanisms. United States: N. p., 2017.
Web. doi:10.1063/1.4996222.
McDevitt, Christopher J., Tang, XianZhu, & Guo, Zehua. Turbulent current drive mechanisms. United States. doi:10.1063/1.4996222.
McDevitt, Christopher J., Tang, XianZhu, and Guo, Zehua. Sat .
"Turbulent current drive mechanisms". United States. doi:10.1063/1.4996222. https://www.osti.gov/servlets/purl/1375883.
@article{osti_1375883,
title = {Turbulent current drive mechanisms},
author = {McDevitt, Christopher J. and Tang, XianZhu and Guo, Zehua},
abstractNote = {Mechanisms through which plasma microturbulence can drive a mean electron plasma current are derived. The efficiency through which these turbulent contributions can drive deviations from neoclassical predictions of the electron current profile is computed by employing a linearized Coulomb collision operator. It is found that a nondiffusive contribution to the electron momentum flux as well as an anomalous electronion momentum exchange term provide the most efficient means through which turbulence can modify the mean electron current for the cases considered. Such turbulent contributions appear as an effective EMF within Ohm’s law, and hence provide an ideal means for driving deviations from neoclassical predictions.},
doi = {10.1063/1.4996222},
journal = {Physics of Plasmas},
number = 8,
volume = 24,
place = {United States},
year = {2017},
month = {7}
}
Web of Science
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