超导托卡马克KSTAR中的离散阿尔芬本征模

Discrete Alfven Eigenmodes in Superconducting Tokamak KSTAR

超导托卡马克更容易实现高参数稳态运行,逐渐成为磁约束核聚变反应装置的发展趋势。αTAE(α-induced toroidal Alfvén eigenmode)是一种由α(α是一种压强梯度标度)诱导的阿尔芬本征模,容易被高能量粒子激发为不稳定模式,影响托卡马克的稳态运行。在研究的参数条件下模拟发现KSTAR超导托卡马克中αTAE在小半径方向上分布很广,不同的安全因子q位形下KSTAR托卡马克中的αTAE分布的情况也不同,最后探讨了αTAE被高能量粒子激发为不稳定模式的情况。

Superconducting tokamak has become the tendency of the magnetic confinement fusion device. It can achieve high steady-state parameters operation. αTAE （a-induced toroidal Alfven eigenmode） are Alfven eigen- modes induced by ot （ otis a pressure gradient scaling） .αTAE are easily excited by energetic particles and turn into the unstable modes which affect tokamak steady-state operation. In the KSTAR superconducting tokamak, we find αTAE are widely distributed in the normalized minor radius, different configurations of safety factor in KSTAR have a close influence on the distribution of the αTAE. Finally we discuss the αTAE are excited by ener- getic particles.