Coaxial configuration for a wide-bandwidth dielectric Cherenkov maser amplifier

Anatoli S. Shlapakovski

doi:10.1117/12.218580

8 September 1995 Coaxial configuration for a wide-bandwidth dielectric Cherenkov maser amplifier

Anatoli S. Shlapakovski

Proceedings Volume 2557, Intense Microwave Pulses III; (1995) https://doi.org/10.1117/12.218580
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

A coaxial dielectric-lined waveguide is considered as the slow-wave supporting structure of the dielectric Cherenkov maser amplifier. Its basic 'quasi-TEM' mode has very weak dispersion at phase velocities closed to the speed of light. This feature is attractive since it may provide the amplifier with very large bandwidth values. The system dispersion relation is derived for an infinitely thin hollow electron beam within a coaxial waveguide loaded with one dielectric liner located at either inner or outer conductor. Spatial growth rates are calculated numerically at various parameters of the slow-wave structure and electron beam. Bandwidth dependences on parameters are examined campared to those of the conventional dielectric Cherenkov maser configuration. Constructive peculiarities of the coaxial configuration allowing original approaches to the problems of electron beam dumping and RF input and output matching are discussed.

Citation Download Citation

Anatoli S. Shlapakovski "Coaxial configuration for a wide-bandwidth dielectric Cherenkov maser amplifier", Proc. SPIE 2557, Intense Microwave Pulses III, (8 September 1995); https://doi.org/10.1117/12.218580

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