Theory of improved confinement in high- beta p tokamaks

A. Fukuyama; K. Itoh; S. I. Itoh; M. Yagi; M. Azumi

doi:10.1088/0741-3335/36/9/001

Theory of improved confinement in high- beta _p tokamaks

A. Fukuyama, K. Itoh, S. I. Itoh, M. Yagi, M. Azumi

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

The dissipative self-organization of the plasma pressure and current in tokamaks is investigated through interactions between bootstrap current and the anomalous transport due to self-sustained turbulence. The strongly reduced magnetic shear due to the pressure-driven current and the magnetic axis shift cause a reduction in the anomalous transport, which enhances the plasma pressure and bootstrap current and leads to a transition to a high- beta _p plasma. The threshold is given by beta _p approximately=1. Simulation results are compared with experimental observations.

Original language	English
Article number	001
Pages (from-to)	1385-1390
Number of pages	6
Journal	Plasma Physics and Controlled Fusion
Volume	36
Issue number	9
DOIs	https://doi.org/10.1088/0741-3335/36/9/001
Publication status	Published - Dec 1 1994

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

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AU - Fukuyama, A.

AU - Itoh, K.

AU - Itoh, S. I.

AU - Yagi, M.

AU - Azumi, M.

PY - 1994/12/1

Y1 - 1994/12/1

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AB - The dissipative self-organization of the plasma pressure and current in tokamaks is investigated through interactions between bootstrap current and the anomalous transport due to self-sustained turbulence. The strongly reduced magnetic shear due to the pressure-driven current and the magnetic axis shift cause a reduction in the anomalous transport, which enhances the plasma pressure and bootstrap current and leads to a transition to a high- beta p plasma. The threshold is given by beta p approximately=1. Simulation results are compared with experimental observations.

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