Gyrokinetic particle simulation of microturbulence for general magnetic geometry and experimental profiles

• DOI: 10.1063/1.4908275
• Publication Date: 2015-02-25T18:00:20Z
• Authors: Yong Xiao; Ihor Holod; Zhixuan Wang; Zhihong Lin; Taige Zhang
• Keywords: Microturbulence; Poisson's equation; Solver; Gyrokinetics

Developments in gyrokinetic particle simulation enable the toroidal code (GTC) to simulate turbulent transport tokamaks with realistic equilibrium profiles and plasma geometry, which is a critical step code–experiment validation process. These new developments include numerical representation using B-splines, Poisson solver based on finite difference field-aligned mesh magnetic flux coordinates, zonal flow for general improvements conventional four-point gyroaverage nonuniform background marker loading. The equation solved perpendicular plane instead of poloidal plane. Exploiting these features, GTC able typical DIII-D discharge experimental geometry profiles. simulated heat diffusivity its radial profile show good agreement other codes. newly developed loading method provides modified that uniform method.