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Author: Robert Hager
Requested Type: Poster
Submitted: 2018-03-01 16:27:01

Co-authors: Y. Chen, J. Dominski, C. S. Chang, S. Ku, S. E. Parker, J. Lang, P. Porazik, M. F. Adams

Contact Info:
Princeton Plasma Physics Laboratory
100 Stellarator Road
Princeton, New Jersey   08540

Abstract Text:
A version of the gyrokinetic total-f particle-in-cell (PIC) code XGC1 has been extended to the MHD/fluid type electromagnetic regime by combining gyrokinetic PIC ions with massless drift-fluid electrons analogous to Chen and Parker [GEM code, Phys. Plasmas 8, 441(2001)]. This work complements - as a more economical alternative - the fully kinetic electromagnetic formulation that is also being developed for XGC1 [S. Ku, APS-DPP 2016]. Global, linear simulations of intermediate wavelength, fluid type electromagnetic modes for the Cyclone Base Case used in the benchmark study by Goerler et al. [Phys. Plasmas 23, 072503 (2016)] have been carried out with this electromagnetic version of XGC1. Since the gyrokinetic codes included in Goerler’s study all used kinetic electrons, we also compare to results from the GEM code using the same massless fluid model. These studies are the groundwork for studying fluid type electromagnetic modes in the tokamak edge plasma and develop a better understanding of the onset of edge localized modes.