Modeling of terahertz radiation emission from a free-electron laser

被引：5

作者：

Sharma, Suresh C. ^{[1
]}

Panwar, Jyotsna ^{[1
]}

Sharma, Rinku ^{[1
]}

机构：

[1] Delhi Technol Univ, Dept Appl Phys, Bawana Rd, Delhi 110042, India

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2017年 / 57卷 / 04期

关键词：

free-electron laser; surface plasma wave; terahertz radiation; wiggler; BEAM; TECHNOLOGY; GAIN;

D O I：

10.1002/ctpp.201600085

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In this article, we report the generation of terahertz (THz) radiation using the interaction of a laser-modulated relativistic electron beam (REB) with a surface plasma wave. Two laser beams propagating through the modulator interact with the REB, leading to velocity modulation of the beam. This results in pre-bunching of the REB. The pre-bunched beam travels through the drift space, where the velocity modulation translates into density modulation. The density-modulated beam, on interacting with the surface plasma pump wave, acquires an oscillatory velocity that couples with the modulated beam density to give rise to a nonlinear current density which acts as an antenna to give THz radiation. By optimizing the parameters of the beam and the wiggler, we obtain power of the order of 10(-4) using the current scheme.

引用

页码：167 / 175

页数：9

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