Radial and zonal modes in hyperfine-scale stellarator turbulence

Jenko, F.; Kendl, A.

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Radial and zonal modes in hyperfine-scale stellarator turbulence

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Jenko, F.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Kendl, A.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Jenko, F., & Kendl, A. (2002). Radial and zonal modes in hyperfine-scale stellarator turbulence. Physics of Plasmas, 9(10), 4103-4106.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0027-41D9-B

Abstract

Electromagnetic plasma turbulence at hyperfine (i.e., electron gyroradius) scales is studied in the geometry of an advanced stellarator fusion experiment, Wendelstein 7-AS [H. Renner, Plasma Phys. Controlled Fusion 31, 1579 (1989)], by means of nonlinear gyrokinetic simulations. It is demonstrated that high-amplitude radial streamers may also exist in non-tokamak devices, raising the electron heat flux to experimentally relevant values. Moreover, some statistical characteristics of the fully developed turbulence are computed, highlighting the (co-)existence, nature, and role of self-generated zonal flows and fields. (C) 2002 American Institute of Physics.