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

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He, W. and Zhang, L. and Bowes, D. and Yin, H. and Ronald, K. and Phelps, A. D. R. and Cross, A. W. (2015) Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam. Applied Physics Letters, 107 (13). 133501. ISSN 0003-6951 (https://doi.org/10.1063/1.4932099)

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Abstract

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 Am􀀀2, 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.

ORCID iDs

He, W. ORCID logoORCID: https://orcid.org/0000-0001-7018-0527, Zhang, L. ORCID logoORCID: https://orcid.org/0000-0002-6317-0395, Bowes, D., Yin, H. ORCID logoORCID: https://orcid.org/0000-0002-6635-9759, Ronald, K. ORCID logoORCID: https://orcid.org/0000-0002-8585-0746, Phelps, A. D. R. ORCID logoORCID: https://orcid.org/0000-0002-1100-1012 and Cross, A. W. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283;
  • Item type:Article
    ID code:54402
    Dates:
    Date
    Event
    28 September 2015
    Published
    20 September 2015
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:30 Sep 2015 11:03
    Last modified:12 Dec 2024 03:34
    URI:https://strathprints.strath.ac.uk/id/eprint/54402
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