Laser-driven relativistic electron dynamics in a cylindrical plasma channel

doi:10.1088/1674-1056/27/3/035201

Abstract The energy and trajectory of the electron, which is irradiated by a high-power laser pulse in a cylindrical plasma channel with a uniform positive charge and a uniform negative current, have been analyzed in terms of a single-electron model of direct laser acceleration. We find that the energy and trajectory of the electron strongly depend on the positive charge density, the negative current density, and the intensity of the laser pulse. The electron can be accelerated significantly only when the positive charge density, the negative current density, and the intensity of the laser pulse are in suitable ranges due to the dephasing rate between the wave and electron motion. Particularly, when their values satisfy a critical condition, the electron can stay in phase with the laser and gain the largest energy from the laser. With the enhancement of the electron energy, strong modulations of the relativistic factor cause a considerable enhancement of the electron transverse oscillations across the channel, which makes the electron trajectory become essentially three-dimensional, even if it is flat at the early stage of the acceleration.

Keywords: laser-plasma interaction direct laser acceleration cylindrical plasma channel

Received: 08 September 2017
Revised: 12 November 2017
Accepted manuscript online:

PACS:	52.38.-r	(Laser-plasma interactions)
	52.38.Kd	(Laser-plasma acceleration of electrons and ions)
	41.75.Jv	(Laser-driven acceleration?)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11475027, 11765017, 11764039, 11305132, and 11274255), the Natural Science Foundation of Gansu Province, China (Grant No. 17JR5RA076), and the Scientific Research Project of Gansu Higher Education, China (Grant No. 2016A-005).

Corresponding Authors: Ju-Kui Xue
E-mail: xuejk@nwnu.edu.cn

Cite this article:

Pan-Fei Geng(耿盼飞), Wen-Juan Lv(吕文娟), Xiao-Liang Li(李晓亮), Rong-An Tang(唐荣安), Ju-Kui Xue(薛具奎) Laser-driven relativistic electron dynamics in a cylindrical plasma channel 2018 Chin. Phys. B 27 035201

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Laser-driven relativistic electron dynamics in a cylindrical plasma channel

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