MAS: a versatile Landau-fluid eigenvalue code for plasma stability analysis in general geometry

Nuclear Fushion

article

J. Bao¹  W.L. Zhang¹  D. Li¹  Z. Lin⁴  G. Dong⁵  C. Liu⁶  H.S. Xie⁷  G. Meng⁹  J.Y. Cheng^1,10  C. Dong¹  J.T. Cao¹ 

[1] Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Songshan Lake Materials Laboratory;University of California;Energy Singularity Co., Ltd;Princeton Plasma Physics Laboratory, Princeton University, PO Box 451, Princeton;Hebei Key Laboratory of Compact Fusion;ENN Science and Technology Development Co., Ltd;Max Planck Institut für Plasmaphysik;Department of Physics, University of Colorado at Boulder

关键词: eigenvalue approach;    plasma waves and instabilities;    kinetic effects;    general tokamak geometry;   

DOI  :  10.1088/1741-4326/acd1a0

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

We have developed a new global eigenvalue code, multiscale analysis for plasma stabilities (MAS), for studying plasma problems with wave toroidal mode number ( n ) and frequency ( ω ) in a broad range of interest in general tokamak geometry, based on a five-field Landau-fluid description of thermal plasmas. Beyond keeping the necessary plasma fluid response, we further retain the important kinetic effects including diamagnetic drift, ion finite Larmor radius, finite parallel electric field (E_{||} ), ion and electron Landau resonances in a self-consistent and non-perturbative manner without sacrificing the attractive efficiency in computation. The physical capabilities of the code are evaluated and examined in terms of both theory and simulation. In theory, the comprehensive Landau-fluid model implemented in MAS can be reduced to the well-known ideal magnetohydrodynamic (MHD) model, electrostatic ion-fluid model, and drift-kinetic model in various limits, which clearly delineates the physics validity regime. In simulation, MAS has been well benchmarked with theory and other gyrokinetic and kinetic-MHD hybrid codes in a manner of adopting the unified physical and numerical framework, which covers the kinetic Alfvén wave, ion sound wave, low- nkink, high- nion temperature gradient mode and kinetic ballooning mode. Moreover, MAS is successfully applied to model the Alfvén eigenmode (AE) activities in DIII-D discharge #159243, which faithfully captures the frequency sweeping of reversed shear AE, the tunneling damping of toroidal AE, as well as the polarization characteristics of kinetic beta-induced AE and beta-induced Alfvén-acoustic eigenmode being consistent with former gyrokinetic theory and simulation. With respect to the key progress contributed to the community, MAS has the advantage of combining rich physics ingredients, realistic global geometry and high computation efficiency together for plasma stability analysis in the linear regime.

【 授权许可】

Unknown