Phys. Rev. Lett. 44, 994–997 (1980)Microtearing Modes and Anomalous Transport in TokamaksReceived 16 April 1979; published in the issue dated 14 April 1980 Microtearing (high-m) modes driven by the electron temperature gradient are found to be unstable for present tokamak parameters. A self-consistent calculation of the nonlinear saturation of this instability yields magnetic fluctuations |B̃|/B≃ρe/LT. The associated crossfield electron thermal conductivity is shown to be inversely proportional to density, consistent with Alcator scaling, and comparable in magnitude with that inferred from experiments. © 1980 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.44.994
DOI:
10.1103/PhysRevLett.44.994
PACS:
52.25.Fi, 52.35.Mw, 52.55.Gb
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