Terahertz Cherenkov radiation induced by a self-modulated electron beam in plasma wakefield
Shengpeng Yang,
Qing Zhou,
Changjian Tang,
Shaoyong Chen,
Yuxi Xia
Affiliations
Shengpeng Yang
The Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan 610064, China
Qing Zhou
National Key Laboratory of Science and Technology on Vacuum Electronics, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Changjian Tang
The Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan 610064, China
Shaoyong Chen
The Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan 610064, China
Yuxi Xia
The Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan 610064, China
In this paper, a novel scheme of generating terahertz radiation is proposed, which considers a relativistic electron beam being modulated by its self-excited plasma wakefield in a plasma-filled slow-wave structure (SWS). Both the dispersion relation and the particle-in-cell simulation show that the self-modulation of the beam can act as a mode-selection method to excite the high-harmonics of the SWS and generate terahertz electromagnetic radiation. The present work gives a new thought for researching high-power and tunable terahertz sources.
