Abstract
Approximate solutions to the wave equation inside a rectangular metallic waveguide has been obtained in terms of cylindrical Gaussian-Hermite functions.E πmn modes propagate with negligible straight guide losses in the far-infrared region. A new type of low-loss optical resonator suitable for FEL operation at long wavelengths is presented here.
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References
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Work Supported by the Office of Naval Research and the Air Force Office for Scientific Research under ONR Contract N00014-80-C-308