ITER条件下高能量粒子对一种新型离散阿尔芬本征模的影响

EFFECTS ONαTAE BY ENERGETIC PARTICLES IN ITER OPERATION

离散阿尔芬本征模是托克马克中存在的一种模式,它具有准边缘不稳定性,能被高能量粒子激发成不稳定模式.国际热核实验反应堆(International Thermonuclear Experimental Reactor,ITER)的设计运行有感应方案、稳态方案和混合方案,文中将在稳态方案下结合电流驱动方式来探讨αTAE的不稳定性.本文主要介绍ITER实验设计运行条件,并据此探究ITER中的αTAE(α-induced toroidal Alfvén eigenmode,α是表示等离子体压强梯度大小的一个参数)及其由高能量粒子激发的不稳定性,结果表明在ITER中能够存在这种αTAE,且能够被高能量粒子激发成为不稳定模式.

The discrete Alfv6n eigenmodes existing in Tokamak reactor, are quasi-marginally stable and can be destabilized by energetic particles easily. Design of international thermonu- clear experimental reactor （ITER） include three possible scenarios. They are inductive operation, steady state operation, and hybrid operation, respectively. In this work, the instability feature of a-induced toroidal Alfv6n eigenmode （aTAEs） are investigated in the steady state operation with both positive and negative magnetic share. This paper is to present the ITER operations and to study ingtability features of the ~TAE and their kinetic excitations by ener- getic particles in the designed operate conditions of ITER experiments. The results show that aTAE indeed exists in ITER operation and can be destabilized by energetic particles.