Electrostatic free-electron laser
A new kind of free-electron-laser (FEL) scheme is proposed, that is, an FEL with an electrostatic centrifugal system of coaxial waveguide, called an ''electrostatic FEL'' for short. An annular relativistic electron beam in the laboratory frame is assumed to encounter a pump wave of TE mode. Solving the Vlasov-Maxwell equations, we have developed the kinetic theory of the above scheme, and obtained the nonlinear dispersion relation describing the various instabilities of the wave modes which can be supported by the system. We have also numerically solved the dispersion relation in the case of taking both pump wave and scattered wave to be the TE/sub 11/ wave mode, and presented the instability structures, in the beam frame, of Compton scattering (two-wave effect) and Raman scattering (three-wave effect) versus the strength of the pump field. Numerical examples demonstrate that this new FEL scheme is of great interest theoretically and practically.
- Research Organization:
- Research Institute of Microwave Electronics, Chengdu Institute of Radio Engineering, Chengdu, Sichuan, People's Republic of China
- OSTI ID:
- 6032366
- Journal Information:
- Phys. Rev. A; (United States), Vol. 36:8
- Country of Publication:
- United States
- Language:
- English
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