Experimental demonstration of a terahertz extended interaction oscillator driven by a pseudospark-sourced sheet electron beam

Shu, G. X. and Zhang, L. and Yin, H. and Zhao, J. P. and Phelps, A. D. R. and Cross, A. W. and Liu, G. and Luo, Y. and Qiao, Z. F. and He, W. (2018) Experimental demonstration of a terahertz extended interaction oscillator driven by a pseudospark-sourced sheet electron beam. Applied Physics Letters, 112 (3). 033504. ISSN 0003-6951

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    Abstract

    We have recently proposed to combine the advantages of a pseudospark-sourced sheet electron beam (PS-SEB) with a planar slow wave structure to generate high power terahertz radiation. To verify this idea, experimental investigation of an extended interaction oscillator based on the PS-SEB has been conducted and presented. A PS-SEB of approximately 1.0 mm×0.17 mm in size with 21.5 A peak current (1.26×104 A/cm2 beam current density) and 34.5 kV peak voltage was measured after propagating a distance of 10-mm without the need of an external focusing magnetic field. A radiation pulse of ~35 ns in duration, and output power of over 10 W at a frequency of ~0.2 THz was measured.