摘要
装置获得的最低qL值是衡最托卡马克磁流体不稳定性的控制水平的重要品质参数.通过精细调节补充送气和电流上升率的方法控制电流密度分布,使用钛吸气方法控制边缘等离子体参数,HL-1装置获得了最低qL值为1.8的稳定等离子体。实验结果表明,若电流上升率与密度上升率之比为(23—40)×10^(-19)kA·m^3的范围内,最利于获得低MHD增长率的稳定放电。预计这与中心q(0)<1峰化的电流密度分布有关。
In the HL-1 tokamak,a stable high-density plasma with q(a)=1.8 has been obtained by current-density profile control,which was achieved by programming both gas puffing and plasma current waveform and by plasma boundary control with titanium gettering,The criterion that the current density profile is favourable to MHD stability for obtain ing a low q1 plasma by this method is to keep Ip/n0 in the range of(23-40)×10-13kA·cm3.The experimental observations suggest that low q1 discharges in HL-1 are related to a peaked current-density profile with q(0)less than 1.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
1990年第2期67-77,共11页
Nuclear Fusion and Plasma Physics
