Gyrokinetic Simulations of Tokamak Micro-Turbulence Including Kinetic Electron Effects
نویسندگان
چکیده
A gyrokinetic toroidal particle code for a 3-dimensional nonlinear turbulence simulation (GT3D) has been developed to study the ion temperature gradient driven – trapped electron mode (ITG-TEM) turbulence in tokamak plasmas. From linear zonal flow damping tests and nonlinear ITG simulations, it is shown that a new method based on a canonical Maxwellian distribution is essential to simulate correct zonal flow dynamics in tokamaks. Recently, GT3D has been extended including kinetic trapped electrons. A computational cost of ITG-TEM calculations are drastically reduced by using a new bounce-averaged kinetic trapped electron model. A short wavelength unstable region of the ITG-TEM is calculated using a gyrokinetic field solver with a Pade approximation. From preliminary linear ITG-TEM calculations, the validity of these calculation models are confirmed.
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