Gyrokinetic toroidal full- 5D Vlasov code GT5D

Idomura, Yasuhiro   ; Ida, Masato; Tokuda, Shinji

A conservative gyrokinetic toroidal five dimensional Vlasov code GT5D is developed. A conservative finite difference scheme is extended to generalized curvilinear coordinates, and a discretization method is developed so that it exactly satisfies the phase space volume conservation, which is an important feature of the gyrokinetic equaion. In the code, highly accurate and robust long time scale tokamak turbulence simulations in a torus configuration are enabled by these techniques. The code is verified through linear benchmark tests against a toroidal particle code. It is also confirmed that first principles such as the particle number conservation and the energy conservation, which was critical issues in the conventional particle code, are satisfied at high presition.