Harmonic radiation due to nonlinear plasma current in beam-plasma interaction

Cai-Dong Xiong; Shenggang Liu

doi:10.1117/12.218581

8 September 1995 Harmonic radiation due to nonlinear plasma current in beam-plasma interaction

Cai-Dong Xiong, Shenggang Liu

Proceedings Volume 2557, Intense Microwave Pulses III; (1995) https://doi.org/10.1117/12.218581
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The broadband microwave radiation of electron beam-plasma interaction has gained more attention in recent years for its potential of frequency tunable. The radiation mechanisms of this interaction process are main plasma radiation and electron beam radiation. In this paper, the harmonic radiation mechanism due to nonlinear plasma current is studied. In the case of short beam-plasma interaction, only longitudinal Lamguir wave excited by the beam in plasmas is considered. The current of plasma electrons corresponding to the Langmuir wave is nonliear, and the Fourier analyses show that the current includes higher harmonic components of plasma frequency (omega) _p. Under the far-distance radiation approximation, the radiation angle distribution and the radiation power caused by the higher harmonic components of the nonlinear source current are derived. And the radiation fields have higher harmonics of (omega) _p. And the dipole radiation may play an important role in plasma radiation.

Citation Download Citation

Cai-Dong Xiong and Shenggang Liu "Harmonic radiation due to nonlinear plasma current in beam-plasma interaction", Proc. SPIE 2557, Intense Microwave Pulses III, (8 September 1995); https://doi.org/10.1117/12.218581

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