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Numerical Simulation of Pulse Shortening in RBWOs
作者姓名:GONGYu-bin  ZHANGZhang  WANGWen-xiang  MENGFan-bao  FANZhi-kai  HUANGMin-zhi
作者单位:[1]SchoolofPhysicalElectronics,UESTCChengdu610054China [2]InstituteofAppliedElectronics,AcademicofEngineeringPhysicsofChinaMianyangSichuan621900China
基金项目:Supported by Fok Ying Tung Education Foundation (No. 81007) and National Natural Science Foundation of China (No. 10276011)
摘    要: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.

关 键 词:RBWO  高功率微波  脉冲缩短  电池粒子  微波管

Numerical Simulation of Pulse Shortening in RBWOs
GONGYu-bin ZHANGZhang WANGWen-xiang MENGFan-bao FANZhi-kai HUANGMin-zhi.Numerical Simulation of Pulse Shortening in RBWOs[J].Journal of Electronic Science Technology of China,2005,3(1):34-39.
Authors:GONG Yu-bin  ZHANG Zhang  WANG Wen-xiang  MENG Fan-bao  FAN Zhi-kai  HUANG Min-zhi
Affiliation:1. School of Physical Electronics, UESTC Chengdu 610054 China
2. Institute of Applied Electronics, Academic of Engineering Physics of China Mianyang Sichuan 621900 China
Abstract: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.
Keywords:high power microwave  RBWO  pulse shortening  particle-in-cell
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