超辐射机制相对论返波管的数值计算
Numerical computation of RBWO in superradiative regime
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摘要: 运用相对论返波管非线性理论，推导出描述相对论返波管束波互作用的非线性自洽方程组；数值求解了该非线性自洽方程组，揭示了相对论返波管中由非稳态束波互作用产生的超辐射现象的基本规律：输出超辐射波峰值功率大约与参与互作用电子总电荷量的平方成正比。并将超辐射和由稳态束波互作用所产生的受激辐射作了相关比较,结果表明：超辐射是短电子束脉冲产生非稳态束波互作用的结果，而受激辐射是长电子束脉冲产生稳态束波互作用的结果；不断增加电子束脉冲宽度，辐射机制由超辐射转变为受激辐射。Abstract: The nonlinear consistent equations were put forward which could describe beam-wave interaction in an relativistic backward wave oscillator(RBWO), using the nonlinear theory of RBWO. The nonlinear consistent equations were solved by numerical computation, some basic rules of superradiation caused by a non-stationary beam-wave interaction were opened out in an RBWO. Some relations and discriminations were presented between superradiation and stimulated radiation in an RBWO.
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