Zonal Flow Dynamics and Control of Turbulent Transport in Stellarators

P. Xanthopoulos, A. Mischchenko, P. Helander, H. Sugama, and T.-H. Watanabe
Phys. Rev. Lett. 107, 245002 – Published 5 December 2011

Abstract

The relation between magnetic geometry and the level of ion-temperature-gradient (ITG) driven turbulence in stellarators is explored through gyrokinetic theory and direct linear and nonlinear simulations. It is found that the ITG radial heat flux is sensitive to details of the magnetic configuration that can be understood in terms of the linear behavior of zonal flows. The results throw light on the question of how the optimization of neoclassical confinement is related to the reduction of turbulence.

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  • Received 7 July 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.245002

© 2011 American Physical Society

Authors & Affiliations

P. Xanthopoulos1, A. Mischchenko1, P. Helander1, H. Sugama2, and T.-H. Watanabe2

  • 1Max-Planck-Institut für Plasmaphysik, Teilinstitut Greifswald, Wendelsteinstrasse 1, D-17491 Greifswald, Germany
  • 2National Institute for Fusion Studies, Graduate University for Advanced Studies, Toki 509-5292, Japan

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Issue

Vol. 107, Iss. 24 — 9 December 2011

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