Compact millimetre wave and terahertz radiation sources driven by pseudospark-generated electron beam

Yin, H. and Cross, A. W. and Zhang, L. and He, W. and Bowes, D. and Ronald, K. and Phelps, A. D R (2016) Compact millimetre wave and terahertz radiation sources driven by pseudospark-generated electron beam. In: IET Colloquium on Millimetre-Wave and Terahertz Engineering & Technology 2016. IET, Stevenage. ISBN 9781785612220

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    Abstract

    A pseudospark (PS) plasma sourced electron beam was both computationally and experimentally studied for generation of millimetre wave and terahertz radiation. The beam-wave interaction region is a sinusoidal rippled-wall slow wave structure of a backward wave oscillator (BWO) in G-band. An electron beam of ∼1 mm diameter carrying a current of up to 10 A with a sweeping voltage of 42 to 25 kV and pulse duration of 25 ns propagated through the interaction region in a plasma environment without the need for a guiding magnetic field, which resulted in broadband millimetre radiation generation over a frequency range of 186-202 GHz with a maximum power of 20 W.