DocumentCode :
3206250
Title :
Free Electron Lasers with Slowly Varying Beam and Undulator Parameters
Author :
Huang, Z. ; Stupakov, G.
Author_Institution :
SLAC, Stanford, CA 94309, USA
fYear :
2005
fDate :
16-20 May 2005
Firstpage :
2059
Lastpage :
2061
Abstract :
The performance of a free electron lasers (FEL) is affected when the electron beam energy varies alone the undulator as would be caused by vacuum pipe wakefields and/or when the undulator strength parameter is tapered in the small signal regime until FEL saturation. In this paper, we present a self-consistent theory of FELs with slowly-varying beam and undulator parameters. A general method is developed to apply the WKB approximation to the beam-radiation system by employing the adjoint eigenvector that is orthogonal to the eigenfunctions of the coupled Maxwell-Vlasov equations. This method may be useful for other slowly varying processes in beam dynamics.
Keywords :
Eigenvalues and eigenfunctions; Electron beams; Elementary particle vacuum; Free electron lasers; Laser beams; Laser theory; Maxwell equations; Resonance; Undulators; X-ray lasers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the
Print_ISBN :
0-7803-8859-3
Type :
conf
DOI :
10.1109/PAC.2005.1591008
Filename :
1591008
Link To Document :
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