中文摘要：

真空触发开关（triggered vacululfi switch，TVS）是大功率脉冲技术领域的重要开关器件之一，它具有结构紧凑、介质恢复迅速、操作无噪声、工作可靠性高、环境适应性强等优点，在中压领域具有广泛的应用前景。TVS的开通过程本质上是电弧燃烧过程。针对TVS的起弧稳定性，搭建了一套场击穿型TVS的触发和实验系统，从电气特性和图像特性两个方面记录其起弧过程。实验和理论分析表明，触发系统的稳定延时大约40μs，起弧过程持续297μs左右；初始等离子体的不同发展决定着TVS的开通。只有充足的初始等离子体，才能产生一定的鞘层电压，从而不断产生新的阴极斑点，保障起弧的稳定性。

英文摘要：

A novel technique, with a home-built experimental set-up, has been successfully developed to experimentally evaluate the stability of the arc starting of the triggered vacuum switch （TVS）. The images of the arc starting, displayed with an oscilloscope, were recorded with a high speed camera to understand the electric and graphic characteristics of the initial stage of the am starting. The results show that the delay of the triggered vacuum switch covers approximately 40μs,and the arc starting lasts about 297μs. We also found that how the initial plasma develops strongly affects the turning-on of the TVS. Only when enough initial plasma is capable of generating a sheath voltage and producing continuously new cathode spots, can a stable arc starting in the TVS be achieved.