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

doi:10.1063/1.4932099

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

Research output: Contribution to journal › Article › peer-review

102 Citations (Scopus)

209 Downloads (Pure)

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.

Original language	English
Article number	133501
Number of pages	4
Journal	Applied Physics Letters
Volume	107
Issue number	13
DOIs	https://doi.org/10.1063/1.4932099
Publication status	Published - 28 Sept 2015

Keywords

broadband terahertz
wave oscillator
pseudospark
electron beams

Access to Document

10.1063/1.4932099Licence: CC BY 3.0

He-etal-APL-2015-Generation-of-broadband-terahertz-radiation-using-a-backward-wave-oscillatorFinal published version, 909 KBLicence: CC BY 3.0

Kevin Ronald
- k.ronaldstrath.acuk
- Physics - Professor
- SUPA
Person: Academic

Gyrotron Travelling Wave Amplifier for high field Electron Paramagnetic Resonance
Cross, A. (Principal Investigator), He, W. (Co-investigator) & Ronald, K. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/06/13 → 30/11/16
Project: Research
Generation of high power, high frequency radiation using high brightness pseudospark-sourced beam
Cross, A. (Principal Investigator), He, W. (Co-investigator), Phelps, A. (Co-investigator), Ronald, K. (Co-investigator) & Zhang, L. (Researcher)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/08 → 31/03/12
Project: Research

IEEE Plasma Science and Applications (PSAC) Award 2017
Phelps, A. (Recipient), 24 May 2017
Prize: Prize (including medals and awards)

Progress in microwave to sub-THz sources at Strathclyde
Phelps, A. (Keynote speaker)
21 Jul 2017
Activity: Talk or presentation types › Invited talk

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.}",

year = "2015",

month = sep,

day = "28",

doi = "10.1063/1.4932099",

language = "English",

volume = "107",

journal = "Applied Physics Letters",

issn = "0003-6951",

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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

U2 - 10.1063/1.4932099

DO - 10.1063/1.4932099

M3 - Article

SN - 0003-6951

VL - 107

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 133501

ER -

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

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Keywords

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Profiles

Kevin Ronald

Projects

Gyrotron Travelling Wave Amplifier for high field Electron Paramagnetic Resonance

Generation of high power, high frequency radiation using high brightness pseudospark-sourced beam

Prizes

IEEE Plasma Science and Applications (PSAC) Award 2017

Activities

Progress in microwave to sub-THz sources at Strathclyde

Cite this