skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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]
  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.
McDevitt, Christopher J., Tang, Xian-Zhu, & Guo, Zehua. Turbulent current drive mechanisms. United States. doi:10.1063/1.4996222.
McDevitt, Christopher J., Tang, Xian-Zhu, 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, 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 = {2017},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Anomalous momentum transport from drift wave turbulence
journal, November 1993

  • Dominguez, R. R.; Staebler, G. M.
  • Physics of Fluids B: Plasma Physics, Vol. 5, Issue 11
  • DOI: 10.1063/1.860610

Turbulent acceleration and heating in toroidal magnetized plasmas
journal, July 2013

  • Garbet, X.; Esteve, D.; Sarazin, Y.
  • Physics of Plasmas, Vol. 20, Issue 7
  • DOI: 10.1063/1.4816021

A review of internal transport barrier physics for steady-state operation of tokamaks
journal, March 2004


Toroidal momentum transport in a tokamak due to profile shearing
journal, June 2014

  • Buchholz, R.; Camenen, Y.; Casson, F. J.
  • Physics of Plasmas, Vol. 21, Issue 6
  • DOI: 10.1063/1.4882443

Intrinsic rotation and electric field shear
journal, April 2007

  • Gürcan, Ö. D.; Diamond, P. H.; Hahm, T. S.
  • Physics of Plasmas, Vol. 14, Issue 4
  • DOI: 10.1063/1.2717891

Consequences of profile shearing on toroidal momentum transport
journal, June 2011


Overview of toroidal momentum transport
journal, August 2011


Turbulence-Driven Bootstrap Current in Low-Collisionality Tokamaks
journal, November 2013


Turbulent current drive
journal, November 2014


Bounce averaged trapped electron fluid equations for plasma turbulence
journal, November 1996

  • Beer, M. A.; Hammett, G. W.
  • Physics of Plasmas, Vol. 3, Issue 11
  • DOI: 10.1063/1.871574

Gyrokinetic simulation of momentum transport with residual stress from diamagnetic level velocity shears
journal, April 2011

  • Waltz, R. E.; Staebler, G. M.; Solomon, W. M.
  • Physics of Plasmas, Vol. 18, Issue 4
  • DOI: 10.1063/1.3579481

Linearized gyro-kinetic equation with collisions
journal, January 1977

  • Catto, P. J.; Tsang, K. T.
  • Physics of Fluids, Vol. 20, Issue 3
  • DOI: 10.1063/1.861902

A quasilinear formulation of turbulence driven current
journal, February 2014

  • McDevitt, C. J.; Tang, Xian-Zhu; Guo, Zehua
  • Physics of Plasmas, Vol. 21, Issue 2
  • DOI: 10.1063/1.4866605

Effects of electromagnetic turbulence in the neoclassical Ohm’s law
journal, May 2004

  • Hinton, F. L.; Waltz, R. E.; Candy, J.
  • Physics of Plasmas, Vol. 11, Issue 5
  • DOI: 10.1063/1.1647134

Quasilinear Diffusion of an Axisymmetric Toroidal Plasma
journal, January 1972


Inter-machine comparison of intrinsic toroidal rotation in tokamaks
journal, October 2007


Physics of non-diffusive turbulent transport of momentum and the origins of spontaneous rotation in tokamaks
journal, March 2009


Effects of q -profile structures on intrinsic torque reversals
journal, August 2015


Three-dimensional computation of drift Alfvén turbulence
journal, October 1997


Theory of plasma transport in toroidal confinement systems
journal, April 1976


A gyro-Landau-fluid transport model
journal, July 1997

  • Waltz, R. E.; Staebler, G. M.; Dorland, W.
  • Physics of Plasmas, Vol. 4, Issue 7
  • DOI: 10.1063/1.872228

Foundations of nonlinear gyrokinetic theory
journal, April 2007


Gyrokinetic simulations of an electron temperature gradient turbulence driven current in tokamak plasmas
journal, October 2016

  • Yi, Sumin; Jhang, Hogun; Kwon, J. M.
  • Physics of Plasmas, Vol. 23, Issue 10
  • DOI: 10.1063/1.4966206

Transport of parallel momentum by drift-Alfvén turbulence
journal, January 2009

  • McDevitt, C. J.; Diamond, P. H.
  • Physics of Plasmas, Vol. 16, Issue 1
  • DOI: 10.1063/1.3039918