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通过提升HT-6M托卡马克等离子体电流,提高了正常欧姆放电状态下的约束能力。等离子体电流上升率为12MA/s,电流提升后,H_α。辐射下降,电子温度分布变陡,电流上升约10％,边界密度在电流提升后迅速增加了50％以上,然后分布逐渐变陡。能量辐射损失减少,其分布变宽。在不同的密度放电过程中,MHD行为出现三种类型,即较强的m=3和m=2的磁扰动变弱;磁扰动转变成锯齿振荡;以及小的快锯齿转变成慢的大锯齿。能量约束时间增加了1.6到1.9倍,粒子约束时间增加了约4倍。文中分析了电流渗透过程并与经典扩散过程进行了比较,所有的实验现象非常类似于L-H模的转变。
By enhancing the HT-6M tokamak plasma current, the ability to restrain in normal ohmic discharge conditions is improved. Plasma current rise rate of 12MA / s, the current increase, H_α. Radiation drops, the electron temperature distribution steep, the current rise of about 10%, the border density increased rapidly after the current increased by 50%, and then gradually steep distribution. The loss of energy radiation decreases and its distribution broadens. At different densities of discharge, there are three types of MHD behavior, ie stronger magnetic perturbations with m = 3 and m = 2 weakened; magnetic perturbations turn into sawtooth oscillation; and small fast sawtooth turns into slow large sawtooth . The energy confinement time increased 1.6 to 1.9 times and the particle confinement time increased about 4 times. In this paper, the current infiltration process is analyzed and compared with the classical diffusion process. All the experimental phenomena are very similar to the transition of L-H mode.