Recent updates of the energetic particle gyro-Landau fluid model

Reduced dimensionality physics models provide useful tools for parameter surveys, profile optimization studies, and long-term nonlinear simulations. The FAR3D model uses Landau fluid closures coupled with finite Larmor radius and drift orbit effects to excite and analyze fast ion resonant Alfvén instabilities in both tokamaks and stellarators. Recently, a number of improvements have been made to this model: extension to up-down asymmetric equilibria, higher order closures (allowing simulation of non-Maxwellian components), improved accuracy of FLR effects, multiple fast ion components, and global eigenmode solver options. These improvements significantly extend the applicability of such a model. The techniques used will be described and examples given of the application of these new capabilities for both tokamaks and stellarators.