THz electromagnetic radiation driven by intense relativistic electron beam based on ion focus regime

Zhou, Qing; Yang, Shengpeng; Xu, Jin; Zhang, Wenchao; Tang, C. J.; Duan, Zhaoyun; Gong, Yubin

doi:10.1063/1.4953422

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…The cross-section of the ideal BPS model is presented in figure 1(a) [26,27], where a uniform electron beam with a density of n b0 , radius of r b0 and velocity of v b0 is injected into a uniform isotropic plasma column with the density of n p0 and radius of r p0 . In figure 1(a), the red area represents the beam, the white area represents the ion channel, and the shaded area represents the plasma.…”

Section: Beam-plasma Model With Residual Electronsmentioning

confidence: 99%

Focusing characteristics of the relativistic electron beam transmitting in ion channel

Xia

Yang

Chen

et al. 2020

Plasma Sci. Technol.

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Based on the beam-plasma system model established in this paper, the trajectory of the electron beam in the ion channel is studied quantitatively through the envelope equation. Under different initial system parameters, the focusing transmission conditions of the beam in the ion channel are discussed. Then, a series of particle-in-cell simulations are performed, which generally versifies the theoretical results and shows some further details of the focusing behavior of the beam. It is found that the deceleration of some electrons around the focusing point or the beam-plasma interaction at the ion channel boundary will result in the generation of the residual electrons, which forms the electron return current that leads to the new instabilities influencing the focusing characteristics of the beam.

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Section: Beam-plasma Model With Residual Electronsmentioning

confidence: 99%

Focusing characteristics of the relativistic electron beam transmitting in ion channel

Xia

Yang

Chen

et al. 2020

Plasma Sci. Technol.

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“…As for the radiation frequency of two types of plasma‐photonic‐crystal‐like beam–plasma systems, they are all the same. According to [5, 6], plasma density influences the radiation frequency of the beam–plasma system, and the plasma density of plasma section in the plasma‐photonic‐crystal‐like beam–plasma system is the same which leads to the same radiation frequency. By comparing the amplitude of electric field in Fig.…”

Section: Simulation Of Pvp Beam–plasma Systemmentioning

confidence: 99%

“…Observing the above system, if the system is full of plasmas, it is a beam–plasma system, which has been studied in [5–9].…”

Section: Introductionmentioning

confidence: 99%

Study on plasma‐photonic‐crystal‐like beam–plasma system

Zhou

Yang

Tang

et al. 2018

J. eng.

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Current reflux from an electron beam transmitted in a plasma ion channel

et al. 2021

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In this paper, the mechanism by which current reflux forms from a plasma-focused electron beam is studied theoretically and numerically by considering nonlinear interactions between the beam and plasma. We demonstrate that a moving virtual cathode can be generated at the end of a plasma ion channel due to the influence of the boundary plasma electrons on the beam, and that this accounts for reflux formation. In addition, the reflux formation condition is derived and analyzed via the beam envelope and space-charge-limited current theories. The results indicate that the virtual cathode tends to form at defocusing positions of the beam. Particle-in-cell simulations are used to verify the theoretical results and to show that the beam divergence and energy spread increase during current reflux formation.

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THz electromagnetic radiation driven by intense relativistic electron beam based on ion focus regime

Cited by 9 publications

References 18 publications

Focusing characteristics of the relativistic electron beam transmitting in ion channel

Focusing characteristics of the relativistic electron beam transmitting in ion channel

Study on plasma‐photonic‐crystal‐like beam–plasma system

Current reflux from an electron beam transmitted in a plasma ion channel

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