Full-f gyrokinetic simulation including kinetic electrons

Idomura, Yasuhiro   ; Asahi, Yuichi*   ; Hayashi, Nobuhiko*; Urano, Hajime*

Full-f gyrokinetic simulations are important tools for analyzing nonlocal turbulent transport, plasma profiles, and the confinement time in fusion plasmas. However, the conventional full-f simulations were limited to ion turbulence with adiabatic electrons. In order to analyze ITER relevant electron turbulence, in this work, we develop a new hybrid electron model for full-f simulations, and verify its accuracy. In the model, passing electrons responses, which induce high frequency noises, are approximated by analytic solutions, and long time scale full-f simulations are enabled by eliminating the high frequency noises. Numerical experiments of electron turbulence using this model clarify new mechanisms for turbulence suppression and momentum transport related to electron turbulence transport. In a validation study, an experimental observation on plasma rotation changes induced by electron heating is successfully reproduced.