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Two-Dimensional Model Including the Mechanism of a Poloidal Shock Structure and Geodesic Acoustic Mode in Toroidal Plasmas

Naohiro KASUYA and Kimitaka ITOH

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan

(Received 9 November 2007 / Accepted 7 February 2008 / Published 25 June 2008)

Abstract

In H-mode plasmas, two-dimensional steep structures of the electrostatic potential and density are formed when a large poloidal flow exists, whose formation mechanism has been studied to obtain a quantitative understanding of the particle transport in H-mode transport barriers. The previous two-dimensional model is extended to investigate parallel flow dynamics when potential and density distributions do not satisfy the Boltzmann relation. The extended model includes the generation mechanism of a poloidal shock structure and geodesic acoustic mode, whose competitive formation can be studied.

Copyright (c) 2008 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

poloidal shock structure, geodesic acoustic mode, H mode, poloidal asymmetry, toroidicity

DOI: 10.1585/pfr.3.S1016

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This paper may be cited as follows:

Naohiro KASUYA and Kimitaka ITOH, Plasma Fusion Res. 3, S1016 (2008).