摘要
Precise control of the discharge in space and time is of great significance for better applications of discharge plasma.Here,we used a femtosecond laser filament to trigger and guide a highvoltage DC pulse discharge to achieve spatiotemporal control of the discharge plasma.In space,the discharge plasma is distributed strictly along the channel generated by the femtosecond laser filament.The breakdown voltage threshold is reduced,and the discharge length is extended.In time,the electrical parameters such as the electrode voltage and the electrode gap affect discharge delay time and jitter.By optimizing the parameters,we can achieve sub-nanosecond jitter of the discharge.Based on the spatiotemporal control of the discharge,we applied filamenttriggered discharge for one-dimensional composition measurements of the gas flow field.Besides,the technique shows great potential in studying the spatiotemporal evolution of discharge plasma.
作者
Zhifeng ZHU
Bo LI
Qiang GAO
Jiajian ZHU
Zhongshan LI
朱志峰;李博;高强;朱家健;李中山(State Key Laboratory of Engines,Tianjin University,Tianjin 300350,People's Republic of China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,People's Republic of China;Division of Combustion Physics,Lund University,Lund SE-22100,Sweden)
基金
funded by National Natural Science Foundation of China(NSFC)(Nos.51806149,91741205)。
