The nonlinear gyrokinetic code GS2 has been extended to treat non-axisymmetric stellarator geometry. Electromagnetic perturbations and multiple trapped particle regions are allowed. Here, linear, collisionless, electrostatic simulations of the quasi-axisymmetric, three-field period national compact stellarator experiment (NCSX) design QAS3-C82 have been successfully benchmarked against the eigenvalue code FULL. Quantitatively, the linear stability calculations of GS2 and FULL agree to within ∼10%.
Simulating gyrokinetic microinstabilities in stellarator geometry with GS2
J. A. Baumgaertel, E. A. Belli, W. Dorland, W. Guttenfelder, G. W. Hammett, D. R. Mikkelsen, G. Rewoldt, W. M. Tang, P. Xanthopoulos; Simulating gyrokinetic microinstabilities in stellarator geometry with GS2. Phys. Plasmas 1 December 2011; 18 (12): 122301. https://doi.org/10.1063/1.3662064
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