Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam | Zendy

Wenlong He | Zendy; Liang Zhang | Zendy; D. Bowes | Zendy; H. Yin | Zendy; K. Ronald | Zendy; A. D. R. Phelps | Zendy; A. W. Cross | Zendy

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Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam

Author(s) -

Wenlong He,

Liang Zhang,

D. Bowes,

H. Yin,

K. Ronald,

A. D. R. Phelps,

A. W. Cross

Publication year - 2015

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4932099

Subject(s) - terahertz radiation , backward wave oscillator , physics , optics , beam (structure) , cathode ray , plasma , current density , electron , atomic physics , quantum mechanics

This paper presents for the generation of a small size high current density pseudospark (PS) electron beam for a high frequency (0.2 THz) Backward Wave Oscillator (BWO) through a Doppler up-shift of the plasma frequency. An electron beam ∼1 mm diameter carrying a current of up to 10 A and current density of 1E8 Am2, with a sweeping voltage of 42 to 25 kV and pulse duration of 25 ns was generated from the PS discharge. This beam propagated through the rippled-wall slow wave structure of a BWO beam-wave interaction region in a plasma environment without the need for a guiding magnetic field. Plasma wave assisted beam-wave interaction resulted in broadband output over a frequency range of 186 - 202 GHz with a maximum power of 20 W

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