Reduced model for energetic ion tail formation by ion cyclotron range of frequency power

High fidelity simulation capabilities for self-consistent minority ion heating, such as the combined AORSA-CQL3D model [1] tend to be impractical for implementation in time dependent integrated modeling frameworks because of their computational requirements. Here we revisit previous work [2, 3] where TORIC and CQL3D were coupled iteratively through a quasilinear diffusion coefficient formulated in the ion finite Larmor radius (FLR) limit in TORIC and through the nonthermal ion distribution from CQL3D. The TORIC solver employs a reduced model for the ion conductivity valid in the FLR limit, thus greatly reducing the computational requirements relative to AORSA. The Python-based Integrated Plasma Simulator (IPS) [4] will be used to couple TORIC and CQL3D thus providing the test of a workflow that could be used in an integrated modeling calculation.



[1] E. F. Jaeger et al, Nuclear Fusion 46, S397 (2006).

[2] J. P. Lee et al, EPJ Web of Conferences 157, 03028 (2017).

[3] J. O. Lee et al, Plasma Phys. Control. Fusion 60, 025007 (2018).

[4] D. B. Batchelor et al, J. Phys. Conf. Ser. 180, 012054 (2009).