Kinetic Damping of Alfven Eigenmodes in General Tokamak Geometry*

A non-perturbative kinetic/MHD eigenvalue code has been constructed for calculation of kinetic damping of shear Alfven eigenmodes in general tokamak geometry. The model describes shear Alfven waves with kinetic effects from both thermal species and energetic particles including thermal ion FLR, parallel electric field and energetic particle destabilization. The model generalizes the previous work [1] to general tokamak equilibria with finite aspect ratio, finite beta and non- circular shape. The code has been benchmarked against known analytic and numerical results for Alfven eigenmodes such as GAE, TAE, and RSAE (or Alfven Cascades). The code is being used to investigate the existence and kinetic damping of various Alfven eigenmodes with non-perturbative kinetic effects from thermal species. The results will be presented. [1] G. Y. Fu, H. L. Berk and A. Pletzer, Phys. Plasmas 12, 082505 (2005)