[Table of Contents]

Plasma and Fusion Research

Volume 9, 3403030 (2014)

Regular Articles

Simulation Study on Nonlocal Transport for Peripheral Density Source
Masatoshi YAGI, Naoaki MIYATO, Akinobu MATSUYAMA and Tomonori TAKIZUKA1)
Japan Atomic Energy Agency, 2-166 Omotedate, Obuchi, Rokkasho, Aomori 039-3212, Japan
1)
Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
(Received 10 December 2013 / Accepted 24 February 2014 / Published 7 April 2014)

Abstract

The simulation study of nonlocal transport for peripheral density source is performed using the 4-field reduced MHD model. A spherical density source is applied in the plasma edge, after saturation of the resistive ballooning turbulence is attained. After a while, the source is switched off. It is found that the nonlocal transport appears at the location far from the edge source, which induces not only (0,0) and (±1, 0) modes but also finite n modes, where (m, n) indicates the set of poloidal mode number m and the toroidal mode number n. These modes interact with each other by the nonlinear and/or toroidal couplings. After switching-on the source, the formation of the spiral structure with poloidal rotation is observed, which yields a connection between core and edge regions. The simulation result indicates that 2D transport plays an essential role to the transient plasma response.

Keywords

nonlocal transport, transient plasma response, toroidal coupling, edge and core coupling

DOI: 10.1585/pfr.9.3403030

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This paper may be cited as follows:

Masatoshi YAGI, Naoaki MIYATO, Akinobu MATSUYAMA and Tomonori TAKIZUKA, Plasma Fusion Res. 9, 3403030 (2014).