FullWave: Hybrid-iterative full wave solver with implicit time stepping algorithm*

FAR-TECH, Inc. has been developing the FullWave code, a hybrid-iterative full wave solver, to model rf waves in hot plasmas including the nonlocal hot plasma responses. The code uses configuration space to discretize wave equations and calculate the nonlocal hot plasma dielectric response[1]. Plasma dielectric responses are calculated without approximations by solving the linearized Vlasov equation using the method of characteristics. Our recently developed hybrid iterative algorithm[1] significantly increases spatial resolution of the RF fields when compared with other state-of-art full wave codes based on direct solvers. FullWave has successfully simulated ECRH waves in tokamaks[2]. To extend the capability to lower frequencies such as Lower-Hybrid and Helicon waves, an implicit algorithm using Crank-Nicolson time stepping is being implemented. We will present FullWave 1D and 2D simulation results for Lower Hybrid and Helicon waves.

[1] V. A. Svidzinski, J. S. Kim, J. A. Spencer, L. Zhao, S. A. Galkin, and E. G. Evstatiev, Phys. Plasmas 23, 112101 (2016)

[2] V. A. Svidzinski et al., Presented at 61^st Annual APS-DPP meeting, Lauderdale, FL (2019)