Plasma and Fusion Research

Volume 3, S1068 (2008)

Regular Articles

Transport Analysis of Dynamics of Plasma Profiles in Helical Devices
Shinichiro TODA1,2) and Kimitaka ITOH1)
1)
National Institute for Fusion Science, Toki-shi, Gifu, 509-5292, Japan
2)
Graduate University for Advanced Studies, Toki-shi, Gifu, 509-5292, Japan
(Received 13 November 2007 / Accepted 12 February 2008 / Published 1 August 2008)

Abstract

Plasma dynamics and structure are studied using a one-dimensional theoretical model for the anomalous transport diffusivities. In this analysis, the high collisional Pfirsch-Schlüter regime is examined and the anomalous particle diffusivity is employed. The reduction of the anomalous particle diffusivity and a steep gradient in the density profile can be obtained. This prediction may be the theoretical explanation for the internal diffusion barrier observed in super dense core plasmas of large helical device.

Keywords

helical toroidal plasmas, turbulent transport, transport barrier, improvement mode, radial electric field, particle confinement

DOI: 10.1585/pfr.3.S1068

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References

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This paper may be cited as follows:

Shinichiro TODA and Kimitaka ITOH, Plasma Fusion Res. 3, S1068 (2008).