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首页> 外文会议>2013 Abstracts IEEE International Conference on Plasma Science >Towards high frequency operation with multi-grating_Smith Purcell FELs
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Towards high frequency operation with multi-grating_Smith Purcell FELs

机译：使用multi-grating_Smith Purcell FEL实现高频工作

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摘要

Three-dimensional simulations and experiments have shown that, for a grating equipped with sidewalls, copious emission of coherent Smith-Purcell (SP) radiation at the fundamental frequency of the evanescent surface wave is possible1, 2. This contrasts with the two-dimensional theory for which emission could only occur at harmonics of that frequency. To increase the emitted frequency towards the THz range with a realistic electron beam, we propose to use several gratings with sidewalls in parallel, with adequate scaling of their parameters. Simulations suggest that the reduction in power, due to the reduced grating period and width needed to reach high frequencies, can be compensated in this way. To test this idea, an experiment is under way.
机译：三维仿真和实验表明，对于装有侧壁的光栅，可能会在van逝面波的基频处大量发射相干的史密斯-珀塞尔（SP）辐射 1、2 。这与二维理论相反，在二维理论中，发射只能在该频率的谐波处发生。为了用现实的电子束将发射频率提高到THz范围，我们建议使用侧壁平行且侧壁具有适当比例缩放的多个光栅。仿真表明，可以通过这种方式来补偿由于减少了达到高频所需的光栅周期和宽度而导致的功率降低。为了检验这个想法，正在进行实验。

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