返波型自由電子激光的小信號理論
SMALL SIGNAL THEORY FOR THE BACKWARD WAVE FREE ELECTRON LASERS
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摘要: 本文利用單粒子理論給出了返波型自由電子激光的小信號理論。通過引入修正因子Fm,常規(guī)自由電子激光的一系列公式可以用于返波自由電子激光。結(jié)果表明:返波FEL具有效率高及束質(zhì)要求低兩大優(yōu)點,故適宜于作為兩級自由電子激光中的一級。
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關(guān)鍵詞:
- 自由電子激光; 返波; 小信號理論
Abstract: A detailed analysis for the backward wave free electron laser (FEL) in small signal regime is conducted, following the single partical approach. By the use of a modified factor Fm, the formulas resulted are similar to those of normal FELs. To compare with normal FELs, these formulas show that the backward wave FELs have two main features: the high energy conversion! effeciency and the loose e-beam quality requirement. So it is suitable to be one stage of the two-stage FEL. -
L.R. Elias, Phys. Rev. Lett, 42(1979), 977-978.[2]W. Zhon, Nuclear Instr. Methods in Physics Research, A234(1985), 198-201.[3]W. B. Colson, Ph. D, Thesis, Stanford University, 1977. -
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