Linear Theory of Free Electron Laser with a Plasma-Loaded Cylindrical Waveguide

被引：0
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作者：
Zongjun Shi
Ziqiang Yang
Zheng Liang
机构：
[1] University of Electronic Science and Technology of China,Institute of High Energy Electronics
来源：
International Journal of Infrared and Millimeter Waves | 2003年 / 24卷
关键词：
Plasma Density; Relativistic Electron; Critical Density; Fluid Model; Dispersion Characteristic;
D O I：
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学科分类号：
摘要：
The dispersion characteristics of plasma–loaded free-electron laser has been analyzed using linear fluid model. The device under consideration consists of the cylindrical metallic waveguide, completely filled with background plasma and a relativistic electron beam which passes through a helical wiggler magnetic field. The result predicts that reasonable plasma density tends to improve the growth rate of the low-frequency optical wave of FEL and causes an shiftup in the operating frequency, However it has little effect on the growth rate of the high-frequency wave. In the plasma–loaded FEL, for the FEL oscillator, it may be tuned by varying the plasma density; and for the FEL amplifier, the wider frequency bandwidth is gained. A critical density ncp for the background plasma density is found.
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页码：1823 / 1831
页数：8
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