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Terahertz electromagnetic radiation based on the interaction between a self-modulated electron beam and plasma wakefield

This particle-in-cell simulation study finds that the system of a long relativistic electron beam passing through an overdense plasma can produce high harmonic terahertz electromagnetic radiation. In this process, the electron beam is self-modulated to create a periodic electromagnetic structure whi...

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Bibliographic Details
Published in:Physics of plasmas 2017-12, Vol.24 (12)
Main Authors: Yang, Shengpeng, Zhou, Qing, Tang, Changjian, Chen, Shaoyong
Format: Article
Language:English
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Summary:This particle-in-cell simulation study finds that the system of a long relativistic electron beam passing through an overdense plasma can produce high harmonic terahertz electromagnetic radiation. In this process, the electron beam is self-modulated to create a periodic electromagnetic structure which will resonate with the plasma wakefield and excite the electromagnetic instability in the nonlinear stage of the self-modulation. The study also finds that when the radiation is achieved, the self-modulated electron beam will be destroyed due to the self-consistent interaction among the radiation, the electron beam, and the plasma. Meanwhile, the radiation will gradually attenuate, which also coincides with the physical explanation of the radiation.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.5003134