The development of an implicit full f method for electromagnetic particle simulations of Alfven waves and energetic particle physics

JOURNAL OF COMPUTATIONAL PHYSICS

卷:440

Article

Lu, Z. X.¹  Meng, G.¹  Hoelzl, M.¹  Lauber, Ph.¹ 

[1] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

关键词: Particle-in-cell simulation;    Implicit scheme;    Particle/moment enslavement;    Tokamak plasmas;    Waves and instabilities;    Fast particle physics;   

DOI  :  10.1016/j.jcp.2021.110384

来源: Elsevier

【 摘 要 】

In this work, an implicit scheme for particle-in-cell/Fourier electromagnetic simulations is developed and applied to studies of Alfven waves in one dimension and three dimensional tokamak plasmas. An analytical treatment is introduced to achieve efficient convergence of the iterative solution of the implicit field-particle system. First, its application to the one-dimensional uniform plasma demonstrates its applicability in a broad range of beta/m(e) values. Second, toroidicity induced Alfven eigenmodes (TAE) are simulated in a three dimensional axisymmetric tokamak plasma, using the widely studied case defined by the International Tokamak Physics Activity (ITPA) Energetic Particle (EP) Topical Group. The real frequency and the growth (or damping) rate of the TAE with (or without) EPs agree with previous results reasonably well. The full f electromagnetic particle scheme established in this work provides a possible natural choice for EP transport studies where large profile variation and arbitrary particle distribution functions need to be treated in kinetic simulations. (C) 2021 Published by Elsevier Inc.

【 授权许可】

Free