CAJ | 학술논문

运用线性回旋动力学与磁流体力学的混合数值程序，研究了JET装置运行条件下高能量粒子对离散阿尔芬本征模的共振激发，发现高能粒子能激发丰富的αTAE动理学不稳定模式。讨论了高能量粒子压强及速度对共振激发的影响。研究了较低和较高自举电流运行状态以及不同环向场波纹度条件下αTAE被高能量粒子激发的物理特性。探讨了ELMs与ITB共存状态下高能量粒子激发多支离散阿尔芬本征模的情形。发现αTAE频谱广阔，且随着共振条件的变化，无论低阶还是高阶的αTAE都可以被高能量粒子激发成不稳定模式。这种潜在的阿尔芬不稳定性值得深入的研究，应当结合更多托卡马克装置的运行条件讨论其激发及物理特征。
운용선성회선동역학여자류체역학적혼합수치정서，연구료JET장치운행조건하고능량입자대리산아이분본정모적공진격발，발현고능입자능격발봉부적αTAE동이학불은정모식。토론료고능량입자압강급속도대공진격발적영향。연구료교저화교고자거전류운행상태이급불동배향장파문도조건하αTAE피고능량입자격발적물리특성。탐토료ELMs여ITB공존상태하고능량입자격발다지리산아이분본정모적정형。발현αTAE빈보엄활，차수착공진조건적변화，무론저계환시고계적αTAE도가이피고능량입자격발성불은정모식。저충잠재적아이분불은정성치득심입적연구，응당결합경다탁잡마극장치적운행조건토론기격발급물리특정。
Resonant excitations of Alfvén eigenmodes by energetic particles in JET operation are investigated employing a gyrokinetic-magnetohydrodynamic(MHD) hybrid simulation code. Multiple branches ofαTAEs can be kinetically destabilized by engetic particles. The influence to the resonant excitation which comes from energetic particle pressure and velocity is investigated. The physical characteristics of αTAE excited by energetic particles are investigated in different bootstrap current operation status as well as in distinct toroidal field ripple amplitude. We find that multiple branches ofαTAEs are excited by energetic particles in ELMs regime compatible with ITB. It is showed that αTAE has a wide frequency spectrum and the isntability modes both higher-order and low-order αTAEs can be excited in various resonance conditions. It’s valuable to explore this kind of potential Alfvén instability, so its excitation and physical characteristics should be investigated under more operating condition in tokamak.