Focusing characteristics of the relativistic electron beam transmitting in ion channel

Yuxi XIA (夏玉玺); Shengpeng YANG (杨生鹏); Shaoyong CHEN (陈少永); Changjian TANG (唐昌建)

doi:10.1088/2058-6272/ab785d

Plasma Science and Technology > 2020 > 22(8): 85001-085001. > DOI: 10.1088/2058-6272/ab785d

Yuxi XIA (夏玉玺), Shengpeng YANG (杨生鹏), Shaoyong CHEN (陈少永), Changjian TANG (唐昌建). Focusing characteristics of the relativistic electron beam transmitting in ion channel[J]. Plasma Science and Technology, 2020, 22(8): 85001-085001. DOI: 10.1088/2058-6272/ab785d

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Focusing characteristics of the relativistic electron beam transmitting in ion channel

College of Physics, Sichuan University, Chengdu 610064, People's Republic of China

Funds: The National Key Research and Development Program of China (No. 2017YFE0300501), and the National Magnetic Confinement Fusion Energy Development Research Project (No. 2017YFE0301203).

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Received Date: November 17, 2019
Revised Date: February 19, 2020
Accepted Date: February 19, 2020

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Abstract

Abstract

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.
- plasma ion channel,
- beam–plasma system,
- electron beam envelop

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References (35)

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