Neoclassical quasilinear theory in the superbanana plateau regime and banana kinetics in tokamaks

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Neoclassical quasilinear transport theory, which is part of a more general theory that unifies neoclassical and quasilinear theories, is extended to the superbanana plateau regime for low frequency (of the order of the drift frequency) electrostatic fluctuations. The physics mechanism that is responsible for the transport losses in this regime is the superbanana plateau resonance. Besides the usual magnetic drifts, Doppler shifted mode frequency also contributes to the resonance condition. Because the characteristic frequency involved in the resonance is of the order of the drift frequency, which is lower than either the bounce or the transit frequency of the particles, the transport losses are higher than the losses calculated in the conventional quasilinear theory. The important effects of the finite banana width, i.e., banana kinetics, are included and are found to reduce the transport losses for short wavelength modes. The implications on the energetic alpha particle energy loss are discussed.

Original languageEnglish
Article number122504
JournalPhysics of Plasmas
Volume24
Issue number12
DOIs
Publication statusPublished - 2017 Dec 1

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plateaus
kinetics
transport theory
energetic particles
transit
particle energy
alpha particles
energy dissipation
electrostatics
low frequencies
physics
wavelengths

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

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Neoclassical quasilinear theory in the superbanana plateau regime and banana kinetics in tokamaks. / Shaing, Ker-Chung.

In: Physics of Plasmas, Vol. 24, No. 12, 122504, 01.12.2017.

Research output: Contribution to journalArticle

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