Integrated modeling for ion cyclotron resonant heating in toroidal systems

The deployment of high power radio frequency waves in the ion cyclotron range constitutes an important operational facility in many plasma devices, including ITER. Not only for pure heating of the plasma, i.e. Ion Cyclotron Resonant Heating (ICRH), but also for the generation of non-inductive current through Ion Cyclotron Current Drive (ICCD). We concentrate on minority species heating scenarios. ICCD can be generated locally and used to control MHD stabilities as for example sawteeth [1]. For a self-consistent numerical description of these effects, an integrated model capable of iterated ICRF simulations has been developed. This model, named SCENIC, includes 3D geometries with full shaping and anisotropic pressure effects (VMEC[2]), warm contributions to the dielectric tensor (LEMan[3]), and finite orbit width (VENUS[4]). It evolves the equilibrium, wave field and full hot particle distribution function until a self-consistent solution is found. We will show applications to JET-like two dimensional equilibria with minority heating scenarios. Effects due to asymmetric wave injection and different heating locations on the hot particle distribution function, the hot dielectric tensor and the equilibrium will be studied. Here, the emergence of a high energy tail in the minority species distribution function is shown explicitly, and some of its exotic features are observed via the RF driven current, the density and pressure around the resonant layer. [1] J. P. Graves et al., Nucl. Fusion 50, 052002 (2010). [2] W. A. Cooper et al., Nucl. Fusion 46, 683 (2006). [3] P. Popovich, W. A. Cooper, and L. Villard, Comp. Phys. Comm. 175, 250 (2006). [4] O. Fischer, W. A. Cooper, M. Y. Isaev, and L. Villard, Nucl. Fusion 42, 817 (2002).