The importance of realistic plasma filament waveforms for the study of resonant wave-filament interactions in tokamak edge plasmas

摘要

Recently, an analytical solution for plane wave scattering at density filaments in magnetized plasma was derived [A. K. Ram and K. Hizanidis, Phys. Plasmas 23, 022504 (2016)], from which conclusions were drawn regarding the possibility of resonant wave-filament interactions [W. Tierens et al., Phys. Plasmas 27, 010702 (2020)] between electromagnetic waves in the ion cyclotron range of frequencies and density filaments in tokamak edge plasmas. This analytical solution relies on several strongly simplified assumptions, such as a constant background density and a discontinuous density step at the filament surface. In this work, we numerically investigate to what extent conclusions based on this analytical solution remain qualitatively true in more realistic scenarios.