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

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.