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Pulse-Width Increase of Reflex Triode Vircator Using the Carbon Fibre Cathode |
| LIU Lie;LI Li-Min;ZHANG Xiao-Ping;WEN Jian-Chun;WAN Hong |
| College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha 410073 |
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LIU Lie, LI Li-Min, ZHANG Xiao-Ping et al 2006 Chin. Phys. Lett. 23 899-902 |
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Abstract We present the investigation on the reflex triode virtual cathode oscillator in which performances of carbon-fibre and stainless-steel cathodes are compared with each other. The experimental results and analyses show that surface tracking induces the electron emission of the carbon fibre cathode. There are electron emission phenomena observed not only from the top of the carbon fibre but also from its side surface. Compared with the case of the stainless steel cathode, the plasma expansion velocity for the carbon fibre cathode is slower, and using the carbon fibre cathode can widen the pulse width of output microwave. The output microwave pulse width reaches an increase of about 20%. This mechanism is different from the conventional explosive emission of metal cathodes.
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52.70.Dw
84.70.+p
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Published: 01 April 2006
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52.70.Dw
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84.70.+p
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(High-current and high-voltage technology: power systems; power transmission lines and cables)
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