High-power free-electron Masers utilising 2D – 1D Bragg lasing cavities

MacInnes, P. and Konoplev, I. V. and Cross, A. W. and He, W. and Ronald, K. and Whyte, C. R. and Robertson, C. W. and Phelps, A. D. R. (2011) High-power free-electron Masers utilising 2D – 1D Bragg lasing cavities. In: 4th Europe/UK-China Workshop on Millimetre Waves and Terahertz Technologies, 2011-09-01 - 2011-09-03, Physics Department, Strathclyde University.

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    Abstract

    We report the results from a coaxial 2D – 1D Bragg cavity based Free-Electron Maser, utilising a highcurrent (1.5kA), magnetically confined, thin annular electron beam with circumference of ~220mm, wall thickness of ~2mm and mean radius of ~35mm. The electron beam was transported through a 2m long coaxial drift-tube with inner and outer radii of 30 mm and 40mm respectively. Results obtained via numerical modelling and experimental observation are presented and compared.