April 4-6

Abstract Details

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Author: Xishuo Wei
Requested Type: Poster
Submitted: 2022-03-04 15:55:03

Co-authors: Yangyang Yu, Jian Bao, Pengfei Liu, Zhihong Lin

Contact Info:
University of California, Irvine
4170 Frederick Reines Hall, UC
Irvine, CA   92697
United States

Abstract Text:
A variety high frequency electromagnetic waves can be excited by energetic particles in fusion plasmas, such as compressional Alfvén eigenmodes (CAE), global Alfven eigenmodes (GAE), and ion cyclotron emission (ICE). These modes typically have frequencies close to or higher than the ion cyclotron frequency. We have developed a fully-kinetic ion schemes, which use either the potentials (ϕ,A) or the electromagnetic fields (E,B). The electron is described by drift-kinetic equation, which can be reduced to a massless fluid model when electron kinetic effects are neglected. The new simulation model has been implemented in the global toroidal GTC code and verified for the generalized electromagnetic ion Bernstein wave dispersion relation. The (ϕ,A) scheme is used to simulate the ICE instability excited by energetic ions, and the growth rate is consistent with the analytical theory. The (E,B) is used to simulate the GAE driven by antenna or energetic particles, which has been benchmarked with ideal MHD eigenvalue code GAM-Solver. Fully kinetic ions are found to affect the GAE eigenmode structure and frequency in the GTC kinetic simulations. Work supported by SciDAC ISEP.