Plasma and Fusion Research

Volume 17, 1403050 (2022)

Regular Articles

Characteristics of Density and Temperature Fluctuation in Fusion Edge Plasma and Implication on Scrape off Layer Width
Shimpei ARAI and Yusuke KOSUGA1)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
(Received 16 February 2022 / Accepted 28 March 2022 / Published 13 May 2022)

Abstract

In this study, in order to evaluate the SOL width of both density and temperature, we analyze Hasegawa-Wakatani model which includes the temperature fluctuations. Different instability regimes, i.e. drift waves and linearly unstable convective cells are studied. It is shown that convective cells are favorable in terms of the heat load reduction on the divertor. Implications on future devices, such as JT-60 SA, ITER, etc, are discussed.

Keywords

SOL, turbulence, instability, drift wave, convective cell, adiabatic electron, hydrodynamic electron

DOI: 10.1585/pfr.17.1403050

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