Operation of the IGNITEX tokamak

IEEE 1989 International Conference on Plasma Science Pub Date : 1989-12-01 DOI:10.1109/PLASMA.1989.166277

S. Eways, R. Carrera, J. Dong, G. Hallock, E. Montalvo

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Abstract

The operation of the IGNITEX ignition tokamak from breakdown to shutdown is discussed. The pulse length of the discharge is extended by precooling the magnet structure to liquid nitrogen temperature between pulses. RF cavity resonance is used to break down the neutral gas and initiate the plasma discharge in a controllable and reproducible way. The structure of the vacuum toroidal cavity modes has been investigated analytically. A numerical study of the field mode structure and the mode evolution during the plasma buildup has been carried out. Plasma current, equilibrium, shaping, and control are provided by an internal inductor with five pairs of single-turn coils which are independently powered by homopolar generators. Plasma coupling is maximized by the proximity of the poloidal field system to the plasma column. The conducting massive structure surrounding the plasma should damp plasma displacements. The MHD plasma equilibrium throughout a typical IGNITEX discharge has been analyzed. The IGNITEX experiment will operate basically in the L-mode without limiter. However, separatrix configurations of equilibrium are easily obtained by minor changes in the pulse shape of the elongation coils.<>

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IGNITEX托卡马克的操作

讨论了IGNITEX点火托卡马克从击穿到关闭的运行过程。通过将磁体结构预冷至脉冲间液氮温度，延长了放电的脉冲长度。利用射频腔共振击穿中性气体，以可控和可重复的方式启动等离子体放电。对真空环形腔模的结构进行了分析研究。对等离子体形成过程中的场模式结构和模式演化进行了数值研究。等离子体电流、平衡、成形和控制由内部电感提供，该电感带有五对单匝线圈，由同极发电机独立供电。由于极向场系统靠近等离子体柱，等离子体耦合得到了最大化。等离子体周围的导电块状结构会抑制等离子体的位移。分析了典型IGNITEX放电过程中的MHD等离子体平衡。IGNITEX实验将基本在l模式下运行，没有限制。然而，平衡的分离矩阵配置很容易通过微小的改变脉冲形状的延伸线圈。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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