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。
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 discussed.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2004年第9期1134-1138,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金资助课题(10275068
10075049)
关键词
托卡马克
电流调制
改善等离子体约束
磁流体不稳定性
Computer simulation
Electric current control
Electric fields
Equations of motion
Magnetohydrodynamics
Plasma confinement
Plasmas
Tokamak devices
