Observation and Control of Transverse Energy-Transport Barrier due to the Formation of an Energetic-Electron Layer with Sheared E×B Flow

T. Cho et al. (GAMMA 10 Group)
Phys. Rev. Lett. 97, 055001 – Published 31 July 2006; Errata Phys. Rev. Lett. 104, 169904 (2010); Phys. Rev. Lett. 104, 259902 (2010)

Abstract

Off-axis electron-cyclotron heating in an axisymmetric barrier mirror produces a cylindrical layer with energetic electrons, which flow through the central cell and into the end region. The layer, producing a localized bumped ambipolar potential ΦC, forms a strong shear of radial electric fields Er and peaked vorticity with the direction reversal of Er×B sheared flow near the ΦC peak. Intermittent vortexlike turbulent structures near the layer are suppressed in the central cell by this actively produced transverse energy-transport barrier; this results in Te and Ti rises surrounded by the layer.

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  • Received 23 December 2005

DOI:https://doi.org/10.1103/PhysRevLett.97.055001

©2006 American Physical Society

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Vol. 97, Iss. 5 — 4 August 2006

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