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

W. He, L. Zhang, D. Bowes, H. Yin, K. Ronald, A. D. R. Phelps, A. W. Cross

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45 Citations (Scopus)

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.
LanguageEnglish
Article number133501
Number of pages4
JournalApplied Physics Letters
Volume107
Issue number13
DOIs
Publication statusPublished - 28 Sep 2015

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backward waves
oscillators
wave interaction
electron beams
broadband
radiation
current density
plasma frequencies
plasma waves
high current
pulse duration
frequency ranges
output
shift
electric potential
magnetic fields

Keywords

  • broadband terahertz
  • wave oscillator
  • pseudospark
  • electron beams

Cite this

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title = "Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam",
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.",
keywords = "broadband terahertz, wave oscillator, pseudospark, electron beams",
author = "W. He and L. Zhang and D. Bowes and H. Yin and K. Ronald and Phelps, {A. D. R.} and Cross, {A. W.}",
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T1 - Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam

AU - He, W.

AU - Zhang, L.

AU - Bowes, D.

AU - Yin, H.

AU - Ronald, K.

AU - Phelps, A. D. R.

AU - Cross, A. W.

PY - 2015/9/28

Y1 - 2015/9/28

N2 - 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.

AB - 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.

KW - broadband terahertz

KW - wave oscillator

KW - pseudospark

KW - electron beams

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JO - Applied Physics Letters

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