托卡马克装置的击穿条件

在CT-6B托卡马克实验装置上研究了充气气压、环向磁场、杂散磁场、环电压等放电条件对击穿的影响。发现垂直方向和水平方向的杂散磁场对击穿影响不同。指出实验结果与汤生放电模型的偏离。用Monte-Carlo方法解出击穿阶段电子分布函数,对汤生模型公式作出修正。关键词：

BREAKDOWN CONDITION IN A TOKAMAK

An experiment has been conducted on CT-6B tokamak in order to study the effect of discharge conditions, such as filling gas pressure, toroidal field, stray magnetic fields and loop vvoltage, on the breakdown. It is found that the dependence of breakdown voltage on the vertical stray field is obviously different from that on the horizontal stray field. The main experimental results are discrepant from the Townsend discharge model. The distribution function of electrons during the breakdown phase has been solved by using a Monte-Carlo code and the breakdown condition deduced from the Townsend model has been revised.