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针对先进实验超导托卡马克(Experimental Advanced Superconducting Tokamak,EAST)装置,本文研究了自举电流和由气球模驱动势阱捕获的离散阿尔芬本征模(α-Induced Toroidal Alfvén Eigenmode,αTAE,α是等离子体压强梯度的标度)的联系;在自举电流条件下,高能量粒子激发αTAE为不稳定模式的情况.理论分析可得自举电流密度大的位置往往存在较大的等离子体压强梯度,而大的等离子体压强梯度很可能诱导产生αTAE.运用磁流体力学模型探讨了在自举电流条件下αTAE存在的特点,发现在小半径方向上自举电流密度较大的区间,集中存在αTAE;运用磁流体力学与回旋动理学混合模型探讨了αTAE被高能量粒子激发为不稳定模式的情况,发现在中性束注入加热等离子体和驱动等离子体电流条件下,当托卡马克中的高能量粒子和αTAE满足波粒共振条件时,αTAE都会被高能量粒子激发为不稳定模式.
Aiming at the advanced Experimental Superconducting Tokamak (EAST) device, this paper studies the bootstrap current and the discrete Alfven Eigenmode (αTAE, α Is the scale of the plasma pressure gradient). In the case of bootstrap current, high-energy particles excite αTAE as the unstable mode. Theoretical analysis can be obtained from the current density of large locations there is often a large plasma pressure Gradient, and a large plasma pressure gradient is likely to induce the generation of αTAE. The magnetohydrodynamics model was used to investigate the existence of αTAE under the bootstrap current conditions. It was found that the region with large bootstrap current densities concentrated in the small radius direction αTAE. By using the hybrid model of magnetohydrodynamics and gyroscopic kinematics, we discuss the case of αTAE being excited by high-energy particles into an unstable mode. It is found that under the condition of neutral beam injection heating plasma and plasma driving current, When high-energy particles and αTAE satisfy the wave-particle resonance conditions, αTAE is excited by the high-energy particles to the unstable mode.