强激光与粒子束, 2004, 16 (9): 1134, 网络出版: 2006-05-15
HT-7超导托卡马克调制电流改善等离子体约束
Improved plasma confinement by modulated toroidal current on HT-7 superconducting Tokamak
托卡马克 电流调制 改善等离子体约束 磁流体不稳定性 Tokamak Modulating plasma current Improved plasma confinement MHD instabilities
摘要
在HT-7超导托卡马克上进行了电流调制改善等离子体约束物理实验,获得了初步的实验结果.对电流调制时的径向电场进行了数值计算和讨论.当等离子体环向电流以适当的频率和幅值周期性调制时,低模数的磁流体不稳定性得到明显的抑制,等离子体中心电子温度增加了33%,等离子体电子密度分布明显陡化,能量约束时间增加了27%~45%.杂质辐射周期性减少,粒子约束时间增加了2倍.在等离子体边界产生更强的径向负电场.
Abstract
The improved confinement phase was observed during modulating toroidal current on the Hefei superconducting Tokamak-7 (HT-7 ). This improved plasma confinement phase is characterized by suppressing magnetohydrodynamic (MHD) instabilities effectively, thus increased the central line averaged electron density and the central electron temperature about 33%, output steeper density profiles, and reduced hydrogen radiation from the edge as well. The global energy confinement time was increased by 27%~45%;The impurity radiation was reduced by modulation of plasma toroidal current;Particle confinement time was increased about two times;A more strong radial negative electric field formed inside the limiter. The radial electric field during modulating current was calculated and disscussed.
毛剑珊, 赵君煜, 沈飙, 罗家融. HT-7超导托卡马克调制电流改善等离子体约束[J]. 强激光与粒子束, 2004, 16(9): 1134. MAO Jian-shan, ZHAO Jun-yu, SHEN Biao, LUO Jia-rong. Improved plasma confinement by modulated toroidal current on HT-7 superconducting Tokamak[J]. High Power Laser and Particle Beams, 2004, 16(9): 1134.