Compact high‐power millimetre wave sources driven by pseudospark‐sourced electron beams

Yin, H.; Zhang, Liang; Xie, Jie; Ronald, K.; He, Wenlong; Shu, Guoxiang; Zhao, Junping; Yin, Yong; Chen, Xiao; Alfadhl, Yasir; Phelps, A. D. R.; Cross, Adrian W.

doi:10.1049/iet-map.2018.6190

Cited by 12 publications

(3 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pseudospark discharge is a transient low-pressure discharge mode that occurs on the left side of the Paschen curve [1][2][3][4][5]. Since the 1970s, when the concept of pseudospark discharge was proposed, the advantages of pseudospark discharge in its application as an electron beam source have been obvious [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of gas pressure and gas type on pseudospark electron beam

Shang,

Ding

2023

J. Inst.

View full text Add to dashboard Cite

Pseudospark discharge is a discharge that occurs in the left band of the Paschen curve. According to previous studies, an electron beam will be generated in the initial stage of pseudospark discharge. This electron beam has the advantages of high energy, high current and self-confinement. It has a promising application in high-power microwave sources, surface treatment of metal materials, etc. To investigate the characteristics of this electron beam, a pseudospark discharge experimental platform is established in this paper. A pseudospark chamber is designed for pseudospark discharge. To trigger the discharge, a high voltage pulse trigger signal is generated by an avalanche transistor Marx circuit and a trigger unit is designed to generate trigger electrons. Faraday Cup is utilized to collect the electron beam and measure the electron waveform. In order to quantitatively characterize the electron beam, we define six electron beam characteristics, including trigger delay, peak current, electron beam charge, electron beam width, electron beam loop current ratio and electron beam loop charge ratio. To investigate the influence of gas pressure and gas type on electron beam characteristics, we experimentally obtained results of electron beam characteristics for different gas pressures and gas type. We mainly investigated the change rule of the electron beam characteristics when the gas pressure changes between 6 Pa and 20 Pa and the similarities and differences of the electron beams under the two gas environments, argon and nitrogen. We find that gas pressure can be used for the modulation of electron beam time delay. The width of the electron beam in the case of nitrogen has a very stable relationship with the gas pressure. Gas pressure and gas type are two important means of controlling the characteristics of pseudospark electron beams.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of gas pressure and gas type on pseudospark electron beam

Shang,

Ding

2023

J. Inst.

View full text Add to dashboard Cite

show abstract

“…Increasing the electron emission current density is a potential solution, however, it is challenging for the thermionic cathode which has a current density typically less than 100 A/cm 2 [1,7,8]. The pseudospark (PS) discharge system can produce a high-intensity electron beam pulse with beam current density up to 10 4 A/cm 2 and brightness up to 10 12 A/(m 2 •rad 2 ) [9][10][11][12]. It also benefits from the unique selffocusing due to the ion channel generated by the beam front, the microwave radiation sources based on a PS discharge can transport a high current beam without the need of an external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Study of a 0.35 THz Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam

Xie

Yuan

Meng

et al. 2020

IEEE Trans. Electron Devices

Self Cite

View full text Add to dashboard Cite

“…The pseudospark plasma cathode has been developed in our groups to be used in VEDs to achieve high power THz radiation as compact and low-cost sources [22], due to its extraordinary features as follows. Firstly, the electron beam generated by pseudospark discharge is characterised by a very high current density of the order of 10 8 A/m 2 [23], which is much higher than that of conventional cathodes (usually 10 6 A/m 2 [11]).…”

Section: Introductionmentioning

confidence: 99%

Study on Wideband THz Backward Wave Oscillator Driven by Pseudospark-Sourced Sheet Electron Beam

Zhang

Alfadhl

et al. 2020

IEEE Trans. Electron Devices

Self Cite

View full text Add to dashboard Cite

A backward wave oscillator (BWO) based on a double staggered grating (DSG) slow wave structure (SWS) is investigated as a high-power wideband THz source, driven by a sheet electron beam emitting from a pseudospark plasma cathode. Firstly, the DSG SWS is optimized in simulation to have a suitable dispersion characteristic. Then, the BWO with a wideband output structure consisting of a tapered section of DSG and an L-shaped connector is modelled under the operating voltage of 24-38 kV and the current density of 2-5×10 7 A/m 2 (beam current of 1.5-3.8 A). A maximum power of 3.9 kW is obtained, and a wide bandwidth of over 38 GHz (343-381 GHz) is achieved. The impact of fabricating errors of the SWS on the performance of the BWO is analyzed in simulation. The effects of the plasma in the interaction space on the BWO performance are also analyzed, showing that the plasma causes an increase in the oscillation frequency by 1.0%-1.2%.

show abstract

Compact high‐power millimetre wave sources driven by pseudospark‐sourced electron beams

Cited by 12 publications

References 50 publications

Influence of gas pressure and gas type on pseudospark electron beam

Influence of gas pressure and gas type on pseudospark electron beam

Study of a 0.35 THz Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam

Study on Wideband THz Backward Wave Oscillator Driven by Pseudospark-Sourced Sheet Electron Beam

Contact Info

Product

Resources

About