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Title: 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 non-diffusive contribution to the electron momentum flux as well as an anomalous electron-ion 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:
 [1];  [1];  [1]
+ Show Author Affiliations
  1. 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) (SC-24); USDOE
OSTI Identifier:
1375883
Alternate Identifier(s):
OSTI ID: 1372948
Report Number(s):
LA-UR-17-24073
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 8; 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; Magnetic Fusion Energy

Citation Formats

McDevitt, Christopher J., Tang, Xian-Zhu, and Guo, Zehua. Turbulent current drive mechanisms. United States: N. p., 2017. Web. doi:10.1063/1.4996222.
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McDevitt, Christopher J., Tang, Xian-Zhu, & Guo, Zehua. Turbulent current drive mechanisms. United States. https://doi.org/10.1063/1.4996222
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McDevitt, Christopher J., Tang, Xian-Zhu, and Guo, Zehua. Sat . "Turbulent current drive mechanisms". United States. https://doi.org/10.1063/1.4996222. https://www.osti.gov/servlets/purl/1375883.
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@article{osti_1375883,
title = {Turbulent current drive mechanisms},
author = {McDevitt, Christopher J. and Tang, Xian-Zhu 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 non-diffusive contribution to the electron momentum flux as well as an anomalous electron-ion 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 = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}
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Publisher's Version of Record
https://doi.org/10.1063/1.4996222
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    Works referencing / citing this record:

    On turbulence driven stationary electric currents in a tokamak
    journal, October 2018

    • Seiferling, F.; Peeters, A. G.; Buchholz, R.
    • Physics of Plasmas, Vol. 25, Issue 10
    • DOI: 10.1063/1.5048581

    Intrinsic current driven by electromagnetic electron drift wave turbulence in the tokamak pedestal region
    journal, October 2019

    Intrinsic current driven by electromagnetic electron temperature gradient turbulence in tokamak plasmas
    journal, July 2018

    A mechanism of neoclassical tearing modes onset by drift wave turbulence
    journal, December 2018

    Self-driven current generation in turbulent fusion plasmas
    journal, June 2019

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