Phase velocity fluctuations and gain in Cherenkov free-electron lasers


Fuente, I. de la and Slot, P.J.M. van der and Boller, K.-J. (2006) Phase velocity fluctuations and gain in Cherenkov free-electron lasers. Journal of Applied Physics, 100 . ISSN 0021-8979

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Abstract:We report on the influence that waveguide-induced fluctuations in the phase velocity of the radiation wave have on the gain of Cherenkov-type free-electron lasers. We theoretically analyze low-gain Cherenkov free-electron lasers with a compact design that require resonator feedback for operation. We find that even small spatial variations of the waveguide parameters along the propagation direction can lead to significant degradation of the gain, and we present typical values for the required degree in waveguide precision that would eliminate such effects
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Copyright:© 2006 American Institute of Physics
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