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Microinstability and Zonal-Flow Response in Mixture Plasmas with Medium-Z and Nonthermal Impurity

Motoki NAKATA^1,2,3)

1)

National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan

2)

The Graduate University for Advanced Studies, Toki 509-5292, Japan

3)

PRESTO, Japan Science and Technology Agency, 418 Honcho, Kawaguchishi, Saitama 332-0012, Japan

(Received 19 April 2022 / Accepted 9 May 2022 / Published 22 June 2022)

Abstract

Ion- and electron-scale microinstabilities and the linear zonal-flow response in mixture plasmas with the medium-Z impurity and He-ash are investigated by means of a multi-species gyrokinetic model. In addition to the charge and dilution effects, stabilization/destabilization by nonthermal He-ash ions is clarified.

Copyright (c) 2022 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

burning plasma, He-ash, impurity, microinstability, zonal flow, gyrokinetic simulation

DOI: 10.1585/pfr.17.1203078

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