Reversed shear Alfvén eigenmodes (RSAEs) are often observed in HL-2A reversed shear discharges with ##IMG## [http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn1.gif] {$q_{\mathrm{min}}\ \sim\ 1$} . The modes are highly localized near ##IMG## [http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn2.gif] {$q_{\mathrm{min}}$} , and their frequencies sweep downward or upward as ##IMG## [http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn3.gif] {$q_{\mathrm{min}}$} decreases. In this work, kinetic-magnetohydrodynamics (MHD) hybrid simulations based on experimental parameters in the HL-2A tokamak are carried out to investigate the linear stability and nonlinear dynamics of RSAEs. Linear simulations show that the frequencies of RSAEs sweep downward ( ##IMG## [http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn4.gif] {$q_{\mathrm{min}}>m/n$} ) first and then upward (

中文翻译：

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托卡马克等离子体中反向剪切Alfvén本征模与快速离子相关非线性共振的混合模拟。

反向剪切Alfvén本征模式（RSAE）通常在## IMG ##的HL-2A反向剪切放电中观察到[http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn1.gif] {$ q _ {\ mathrm {min}} \ \ sim \ 1 $}。这些模式高度本地化在## IMG ##附近[http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn2.gif] {$ q _ {\ mathrm {min}} $} ，并且它们的频率向下或向上扫描为## IMG ## [http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn3.gif] {$ q _ {\ mathrm {min} } $}减少。在这项工作中，基于HL-2A托卡马克实验参数进行了动磁磁流体动力学（MHD）混合模拟，以研究RSAE的线性稳定性和非线性动力学。线性模拟显示，RSAE的频率向下扫掠（## IMG ## [http://ej.iop.org/images/0029-5515/60/10/106012/nfaba673ieqn4。