Gyrokinetic simulation of electron turbulence spectrum

Kawai, Chika; Maeyama, Shinya; Idomura, Yasuhiro   ; Ogawa, Yuichi*

Self organization through inverse energy cascade in quasi two dimensional turbulence spectra is considered as a mechanism of the formation of zonal flow structure in magnetized plasma. However, relation between turbulence energy spectra and formation of zonal flow structure has not been clarified in first-principles based plasma turbulence simulations. In this study, we examine relations between turbulent energy spectra and structure formations due to self-organization, which are derived from a fluid description of plasma turbulence, the Hasegawa-Mima equation, using gyrokinetic Vlasov simulations of electron turbulence.