New instabilities of free-electron laser with an axial guide magnetic field |
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| Authors: | Qingyuan Wang Kesong Hu Yi Su |
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| Affiliation: | (1) Research Institute of High Energy Electronics, University of Electronic Science & Technology of China, 610054 Chengdu, People's Republic of China;(2) Applied Electronics Institute, China Academy of Engineering Physics, 610003 Chengdu, People's Republic of China |
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| Abstract: | In this paper, the unperturbed orbits, their stable conditions and the single-pass gain of a free-electron laser have been treated with a single-particle theory to show the existence of a couple of new instabilities and moreover, to discuss their effects. Numerical analyses reveal that the new instabilities will probably affect the operation of free-electron laser when the guide field increases and get into the vicinity of its stability boundary. |
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