Verification of the global gyrokinetic stellarator code XGC-S for linear ion temperature gradient driven modes

Abstract

XGC (X-point Gyrokinetic Code) is a whole-volume, total-f gyrokinetic particle-in-cell code developed for modelling tokamaks. In recent work, XGC has been extended to model more general 3D toroidal magnetic configurations, such as stellarators. These improvements have resulted in the XGC-S version. In this paper, XGC-S is benchmarked for linear electrostatic ion temperature gradient-driven microinstabilities, which can underlie turbulent transport in stellarators. An initial benchmark of XGC-S in tokamak geometry shows good agreement with the XGC1, ORB5, and global GENE codes. A benchmark between XGC-S and the EUTERPE global gyrokinetic code for stellarators has also been performed, this time in geometry of the optimised stellarator Wendelstein 7-X. Good agreement has been found for the mode number spectrum, mode structure, and growth rate.

arXiv comment14 pages, 15 figures

References in corpus (4)

• Resilience of quasi-isodynamic stellarators against trapped-particle instabilities
• A fast low-to-high mode bifurcation dynamics in a tokamak edge plasma gyrokinetic simulation
• Collisionless microinstabilities in stellarators II - numerical simulations
• Pedestal and edge turbulence characteristics from an XGC1 gyrokinetic simulation

Cited by in corpus (6)

• Electromagnetic total-f algorithm for gyrokinetic particle-in-cell simulations of boundary plasma in XGC
• Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry
• Why carbon dioxide makes stellarators so important
• Electrostatic gyrokinetic simulations in Wendelstein 7-X geometry: benchmark between the codes stella and GENE
• Instabilities and turbulence in stellarators from the perspective of global codes
• Global linear drift-wave eigenmode structures on flux surfaces in stellarators: ion temperature gradient mode