In plasmas in the National Spherical Torus Experiment (NSTX) (Ono et al 2000 Nucl. Fusion40 557) heated with neutral beams, the beam ions typically excite energetic particle modes (or fishbones), and toroidal, global or compressional Alfvén eigenmodes. These modes can redistribute the energetic beam ions, altering the beam driven current profile and the plasma heating profile, or they may affect electron thermal transport or cause losses of the beam ions. In this paper we present experimental results where these instabilities, driven by the super-thermal beam ions, are suppressed with the application of high harmonic fast wave heating.
球形托卡马克实验装置(NSTX)(Ono等,2000年,Nucl. Fusion 40, 557)中,利用中性束加热的等离子体中,束离子通常会激发高能粒子模(或鱼骨模),以及环形、全局或压缩阿尔芬本征模。这些模能够重新分布高能束离子,改变束驱动电流分布和等离子体加热分布,或者可能影响电子热输运,甚至导致束离子损失。本文展示了在应用高谐波快波加热时,这些由超热束离子驱动的不稳定性被抑制的实验结果。