Amplification of ultrashort electromagnetic pulses propagating along quasi-continuous electron beams
Amplification of ultrashort electromagnetic pulses propagating along quasi-continuous electron beams
复制标题
沿准连续电子束传播的超短电磁脉冲的放大
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Yalandin
中科院分区：
文献类型：
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作者：
V. Baryshev;N. Ginzburg;I. Zotova;A. Sergeev;R. Rozental;M. Yalandin
分析了短电磁脉冲在沿着稳态非平衡电子流中传播时的放大特性，电子流的群速度与粒子的平动速度不同。它示出的幅度水平大大高于准连续信号的放大的饱和水平，可以通过永久注入的电子，而无需初始调制的脉冲前沿之一。被放大的脉冲的有效持续时间同时减小。切伦科夫和波荡器的相互作用机制被认为是。使用一个简单的1D模型进行分析的基础上的平均描述的电子波相互作用，以及直接数值模拟的基础上考虑到计划的实验参数的观测这种效果的KARAT代码。
Specific features of amplification of short electromagnetic pulses propagating along steady-state nonequilibrium electron flows with a group velocity differing from the translational velocity of particles are analyzed. It is shown that an amplitude level substantially higher than the saturation level in amplification of quasi-continuous signals can be attained by permanent injection of electrons without initial modulation to one of the pulse fronts. The effective duration of the pulse being amplified is reduced simultaneously. The Cherenkov and undulator interaction mechanisms are considered. Analysis is carried out using a simple 1D model based on the averaged description of the electron-wave interaction, as well as direct numerical simulation based on the KARAT code taking into account the parameters of planned experiments on observation of this effect.