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

Xie, Jie; Yuan, Xuesong; Meng, Lin; Cross, Adrian W.; Zhang, Liang; Yin, H.; He, Wenlong; Phelps, A. D. R.; Ronald, K.; Chen, Xiaodong; Zhang, Jin; Alfadhl, Yasir

doi:10.1109/ted.2019.2957760

Cited by 31 publications

(8 citation statements)

References 35 publications

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“…The OST of EIOs in other reported research papers is listed in Table 2. [18] 5.1 ns 0.35 THz sheet beam EIO [9] 4.3 ns The EIO in this paper 1.9 ns…”

Section: Conclusion and Discussionmentioning

confidence: 83%

“…OST 0.19 THz pencil beam EIO [7] 7.3 ns 0.2 THz sheet beam EIO [18] 5.1 ns 0.35 THz sheet beam EIO [9] 4.3 ns The EIO in this paper 1.9 ns…”

Section: Extended Interaction Oscillatorsmentioning

confidence: 91%

“…For a conventional thermionic cathode system, the electron transmission in the beam tunnel needs the external magnetic field [8] and it is a challenge to augment the current Electronics 2022, 11, 664 2 of 10 density for the conventional thermionic cathode system [9]. However, some experimental results demonstrated that hundreds of amperes of electron beam generated by the PS electron source can also be transmitted in the absence of an external guiding magnetic field [10].…”

Section: Introductionmentioning

confidence: 99%

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Research of the Oscillation Start-Up Time in an Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam

Peng

Yin

et al. 2022

Electronics

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High current density and high brightness are critical factors for high-power and compact extended interaction oscillators (EIOs) which are operated in the terahertz (THz) waveband. The pseudospark-sourced (PS) sheet electron beam, which combines merits including high current density, a relatively big beam cross-section and no requirement for the external focusing magnetic field, is a good choice for application to high-frequency EIO. The pulse generated by the PS electron beam can last around tens of nanoseconds or even less, thus the EIO’s oscillation start-up time (OST) should be short enough. This paper researched how to reduce OST in an EIO driven by the PS sheet electron beam. The authors realized that the OST of EIO was very sensitive to the gap length under the equal period. The distribution of the electric field is optimized by adjusting the length of the gap. The strong electric field strength is conducive to the beam-wave interaction, and the OST is affected by the beam-wave interaction. When the gap length reaches a suitable value, the OST becomes the shortest. The simulation results showed the EIO’s shortest OST was 8 ns and the corresponding peak output power was 2 kW at 0.19 THz, while the current density was 500 A/cm2. When current density reached 10,000 A/cm2, the shortest OST could even be 1.9 ns.

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“…The OST of EIOs in other reported research papers is listed in Table 2. [18] 5.1 ns 0.35 THz sheet beam EIO [9] 4.3 ns The EIO in this paper 1.9 ns…”

Section: Conclusion and Discussionmentioning

confidence: 83%

“…OST 0.19 THz pencil beam EIO [7] 7.3 ns 0.2 THz sheet beam EIO [18] 5.1 ns 0.35 THz sheet beam EIO [9] 4.3 ns The EIO in this paper 1.9 ns…”

Section: Extended Interaction Oscillatorsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research of the Oscillation Start-Up Time in an Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam

Peng

Yin

et al. 2022

Electronics

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“…Different millimeter-wave interaction circuits were investigated, including the Cherenkov maser 9 , the backward wave oscillator 12 , and the extended interaction oscillator (EIO) 19 . Among these interaction circuits, the EIO has the advantages of high gain per unit length, high electronic efficiency, high radiation power, and a compact structure.…”

Section: Eio Interaction Circuitmentioning

confidence: 99%

Pseudospark-sourced beam and its application in high-power millimeter-wave generation

Zhang

Yin

et al. 2021

Sci Rep

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A pseudospark (PS) discharge can generate an electron beam with a high current density. The electron beam can be self-focused by an ion channel and transported over a long distance without the need for an external magnetic field. Such features make it attractive to drive millimeter-wave/THz interaction circuits for the generation of high-power radiation from a compact device. This paper presents the experimental results on the generation and transportation of the PS-sourced beam with different cross-sections, as well as the differences of the PS-sourced beam with and without post acceleration. Its application in millimeter-wave/THz sources was demonstrated by the operation of extended interaction oscillators (EIOs) at different frequencies is presented.

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“…The model of the DSG SWS is built and optimized in CST microwave studio. We use oxygen free copper (OFC) as the building material due to its high conductivity and good machinability, modelled by a lossy metal with a conductivity of 1.17×10 7 S/m (σ Cu /5, σ Cu is the OFC conductivity at low frequencies), which is a reasonable estimate for the OFC conductivity in sub-THz range [29]. The obtained optimized dimensional parameters are shown in Table I.…”

Section: Analysis On Dispersion Characteristicsmentioning

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

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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%.

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

Cited by 31 publications

References 35 publications

Research of the Oscillation Start-Up Time in an Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam

Research of the Oscillation Start-Up Time in an Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam

Pseudospark-sourced beam and its application in high-power millimeter-wave generation

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

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