Benchmark test of full-f gyrokinteic codes

Asahi, Yuichi   ; Idomura, Yasuhiro   ; Ina, Takuya; Garbet, X.*; Grandgirard, V.*; Latu, G.*

In the so-called delta-f gyrokinetic simulations, the scale separation between the equilibrium and fluctuation plasmas is assumed, and the time evolution is solved only for the fluctuation part. In contrast, in the full-f gyrokinetic simulations, both of the equilibrium and fluctuation plasmas are solved on the basis of the same first principle, where the self-consistent simulations for the equilibrium and fluctuation plasmas are possible. So far, there are a plenty number of cross-code benchmarks for delta-f gyrokinetic simulations, which helps to improve the robustness of the simulations. However, this is not the case for the full-f simulations since the complicated full-f physics makes benchmarks more difficult. In the presentation, we will show the progress of the full-f benchmarks and discuss the confronting issues.