Turbulent current drive mechanisms

McDevitt, Christopher J.; Tang, Xian-Zhu; Guo, Zehua

doi:10.1063/1.4996222

Title: Turbulent current drive mechanisms

Journal Article · Sat Jul 01 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4996222· OSTI ID:1375883

McDevitt, Christopher J. ^[1]; Tang, Xian-Zhu ^[1]; Guo, Zehua ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Fusion Energy Sciences (FES) (SC-24); USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1375883

Alternate ID(s):: OSTI ID: 1372948

Report Number(s):: LA-UR-17-24073

Journal Information:: Physics of Plasmas, Vol. 24, Issue 8; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Cited By (6)

On turbulence driven stationary electric currents in a tokamak Seiferling, F.; Peeters, A. G.; Buchholz, R. Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5048581	journal	October 2018
Intrinsic current driven by electromagnetic electron drift wave turbulence in the tokamak pedestal region He, Wen; Wang, Lu; Zhuang, Ge Plasma Physics and Controlled Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1361-6587/ab4682	journal	October 2019
Intrinsic current driven by electromagnetic electron temperature gradient turbulence in tokamak plasmas He, Wen; Wang, Lu; Peng, Shuitao Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad20e	journal	July 2018
A mechanism of neoclassical tearing modes onset by drift wave turbulence Cai, Huishan Nuclear Fusion, Vol. 59, Issue 2 https://doi.org/10.1088/1741-4326/aaf3e8	journal	December 2018
Self-driven current generation in turbulent fusion plasmas Wang, W. X.; Hahm, T. S.; Startsev, E. A. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab266d	journal	June 2019
Intrinsic current drive by electromagnetic electron temperature gradient turbulence in tokamak plasmas He, Wen; Wang, Lu; Peng, Shuitao arXiv https://doi.org/10.48550/arxiv.2006.15293	text	January 2020

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