Simulating Gyrokinetic Microinstabilities in Stellarator Geometry with   GS2
  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%. 
J. A. Baumgaertel, E. A. Belli, W. Dorland, W. Guttenfelder, G. W.   Hammett, D. R. Mikkelsen, G. Rewoldt, W. M. Tang, and P...
physics.plasm-ph