摘要
HT—7超导托卡马克上的实验观察到,通过对等离子体环向电流的交流调制(即振荡通量电流驱动)的方法,可有效抑制撕裂模不稳定性,从而抑制大破裂。环向电流的交流调制也可减轻等离子体与壁的相互作用,减小杂质辐射,延长托卡马克等离子体放电时间。HT—7超导托卡马克上的实验发现,用等离子体环向电流的交流调制的方珐,有效抑制MHD、推迟或避免大破裂的阈值是:当等离子体电流的交流调制幅值与等离子体电流的比值为10％～30％时有明显的抑制效果,小于10％时无抑制效果,大于35％会影响等离子体的稳定性。
Suppressing tearing mode instability effectively and avoiding major disruption were observed by modulation of plasma toroidal current (oscillating fluxes current driven) on the HT—7 superconducting Tokamak experiment. The interaction between plasma and wall was weakened. The impurity radiation can be reduced by modulation of plasma toroidal current. The time of Tokamak plasma discharge can be longer. The threshold in current modulation for MHD suppression: If the modulation amplitude was 10%～30%, the suppression of MHD activity effectively; If the modulation amplitude was<10%, no suppression of MHD activity; If the modulation amplitude was>35%, the plasma will be unstable.
出处
《科学技术与工程》
2003年第5期441-444,共4页
Science Technology and Engineering
基金
国家自然科学基金(10275068和10075049)
