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【期刊论文】Numerical Simulation of Pulse Shortening in RBWOs*
宫玉彬, GONG Yu-bin, ZHANG Zhang, WANG Wen-xiang, MENG Fan-bao, FAN Zhi-kai, HUANG Min-zhi
Journal of Electronic Science and Technology of China Mar. 2005 Vol. 3 No.1 034~039,-0001,():
-1年11月30日
Pulse shortening hinders improvement of microwave output energy for high power microwave tubes. So far, it is also an unresolved problem in the field of high power microwave devices. In this paper, relativistic backward wave tube (RBWO) is treated as an example to study the pulse shortening phenomena. The influences of gas existing in the tube and explosive emission in inner surface of RBWO are all investigated by means of the particle-in-cell method. Through the simulation results, it can be predicted that the background gas in the tube is one but not the most important factor resulting in pulse shortening, in order to broaden the pulse width of gas-filled RBWO, the pressure of the filled gas must be controlled in a proper value. The explosive emission in the surface of slow wave structure due to intense electric field is one of the most important factors causing pulse shortening in high power microwave tube. Some methods to overcome this kind of explosive emission are also given.
high power microwave, RBWO, pulse shortening, particle-in-cell
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