[1] [1] Li Dongqing,Zhang Zhongdian,Jiang Weiyan. TIG touch striking arc method with small current[J]. Transactions of the China Welding Institution,2001,22(5):69-72

[2] [2] Li Liangyu,Liu Jingkui,Su Shujing. Development and current state of starting arc techniques for TIG welding[J]. Electric Welding Machine,1995,(1):23-25

[3] [3] A. Wolny,A. D. Stokes. Ignition of an electrical arc in a capillary:arc parameters in the initial period[J]. IEE Proc. Part C,1994,141(5):480-484

[4] [4] N. Wakatsuki,Y. Akiba,Y. Yonezawa. Time-coordinated switching relay for arc discharge suppression[J]. IEICE Transactions on Electronics,2005,88(8):1635-1640

[5] [5] Lin Dechao,Shi Yaowu. High frequency and touchable arc starting system TIG welding based on programmable logical controllers[J]. Mechanical Science and Technology,1997,16(3):515-518

[6] [6] Guo Heping,Qian Yiyu,Fang Hongyuan. Mechanism of starting arc in hollow cathode vacuum arc welding[J]. Transactions of the China Welding Institution,2001,22(5):79-82

[7] [7] Tang Xiahui,Zhu Haihong,Zhu Guofu. Study of plasma control in high power CO2 laser welding[J]. Chinese J. Lasers,1997,A24(2):174-178

[8] [8] Chen Genyu,Zhao Zhi,Zhang Yi et al.. Data process method for measurement of plasma plume temperature field in deep penetration laser welding[J]. Chinese J. Lasers,2008,35(11):1778-1782

[9] [9] Zhang Baohua,Liu Wenqing,Cui Zhifeng. Time and spatial evolution of the electron density in laser-induced Co plasmas[J]. Chinese J. Lasers,2008,35(10):1485-1490

[10] [10] Liu Jinhe,Zhu Shigang. Image processing on high-speed photography of CO2 laser welding plasma[J]. Applied Laser,2002,22(3):342-344