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Cross-verification of the global gyrokinetic codes GENE and XGC

2018; American Institute of Physics; Volume: 25; Issue: 6 Linguagem: Inglês

10.1063/1.5036563

1527-2419

G. Merlo, J. Dominski, A. Bhattacharjee, C. S. Chang, F. Jenko, S. Ku, Emmanuel Lanti, Scott Parker,

Particle accelerators and beam dynamics

A detailed cross-verification between two global gyrokinetic codes, the core continuum code GENE and the edge particle-in-cell code XGC, for the linear and nonlinear simulations of ion-temperature-gradient modes is carried out. With the recent developments in the edge gyrokinetics, it may be feasible someday to describe the whole tokamak plasma on turbulence timescales using a coupled gyrokinetic simulation model. Before pursuing this, the core code (GENE) and the edge code (XGC) must be carefully benchmarked with each other. The present verification provides a solid basis for future code coupling research. Also included in the benchmarking is the global particle-in-cell code ORB5, to raise the confidence in the quality of the obtained results. An excellent agreement between all three codes is obtained. Furthermore, in order to facilitate a benchmark framework for other codes, we make a specific effort to provide all the relevant input parameters and precise details for each code.