Full-f gyrokinetic simulations at the Exa-scale

Idomura, Yasuhiro   

Full-f gyrokinetic simulations are important tools for estimating confinement properties of fusion plasmas. On Peta-scale machines, capabilities of full-f gyrokinetic simulations have been significantly expanded, and the understanding of ITER-relevant issues such as the plasma size scaling of turbulent transport has been dramatically advanced. On the next generation Exa-scale machines, it is expected that core operation scenario of ITER will be optimized by full-f gyrokinetic simulations of turbulent burning plasmas. In this talk, we discuss physical and computational challenges towards such burning plasma simulations.