Title :
Research on the Interaction of Primary Plasma and Main Electrode for Laser Triggered Vacuum Switch
Author :
Xiaopo Mao ; Zhenghao He ; Ying Wang ; Wenfang Fan ; Huazhong Lin ; Yuqing Wang ; Zhuang Liu
Author_Institution :
State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
In this paper, the basic structure and working mechanism of laser triggered vacuum switch (LTVS) are briefly introduced, the processes of primary plasma production and expansion are also analyzed. A series of experiments have been carried out under different conditions of LTVS, such as laser energy levels, voltages, and polarity configuration modes. The relationship of conduction and jitter time delays among the laser energy, voltage, and polarity are described, and the effect of main electrode and the expansion of primary plasma are analyzed. The theoretical basis for structure optimization design of LTVS is provided. Under positive polarity configuration that is beneficial to generate the cathode spots, the high working reliability and small time delay of LTVS are verified by the experiments. The results prove that the expansion of primary plasma is the growth of plasma sheath near cathode.
Keywords :
cathodes; plasma production; plasma sheaths; vacuum switches; LTVS; cathode spots; jitter time delays; laser energy levels; laser triggered vacuum switch; main electrode; plasma sheath; polarity configuration modes; positive polarity configuration; primary plasma production; Cathodes; Delay effects; Ions; Laser beams; Plasmas; Switches; Conduction time delay; jitter time delay; laser triggered vacuum switch (LTVS); polarity configuration mode; polarity configuration mode.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2362612