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在小型的托卡马克“微环”装置上,我们使用由内窥镜—纤维光导—高速分幅摄影机及单色仪—光电记录组成的时空分辨的实时观测系统,研究了暴露在等离子体中的表面探头上一次及多次的单极弧。观察到弧斑沿弧迹的产生经过及其眺跃运动。观察到一个弧斑的弧电流约为30—170安培,单个弧斑的发光持续时间是几微秒到儿十微秒;在表面上移动的速度是20—400米/秒;由一次单极弧形成一条弧迹的时间是几十到几百微秒。在材料和方位不同的探头上得到各种分叉形状的弧迹。研究了弧和主放电之间的一些关系。
In a small tokamak “microcycle” device, we used a spatio-temporal resolved real-time observation system consisting of an endoscope-fiberoptic guide-high speed webcam and monochromator-optoelectronic recording to investigate the effect of exposure to plasma Surface probe on the single and multiple arcs. The generation of arc spot along the arc was observed and its overturning movement was observed. It is observed that the arc current of an arc spot is about 30-170 amperes, the duration of light emission of a single arc spot is a few microseconds to a few tens of microseconds, the speed of movement on the surface is 20-400 meters / second, Arc to form a arc time is tens to hundreds of microseconds. Various bifurcated arcs are obtained on probes with different materials and orientations. Some relations between arc and main discharge were studied.