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Chin. Phys. B, 2019, Vol. 28(4): 044101    DOI: 10.1088/1674-1056/28/4/044101

Electron self-injection and acceleration in a hollow plasma channel driven by ultrashort intense laser pulses

Suhui Deng(邓素辉), Mingping Liu(刘明萍)
School of Information Engineering, Nanchang University, Nanchang 330031, China

The self-injection and acceleration of electrons in a hollow plasma channel driven by ultrashort intense laser pulses is investigated by Particle-in-Cell (PIC) simulations. It is shown that electrons from the bubble sheath will be self-injected into the hollow plasma channel and move radially towards the channel border due to the lack of focusing force in the hollow plasma channel. After several reflections near the channel wall by the strong focusing force, a self-injected electron bunch can be confined in the hollow plasma channel and quasi-phase-stably accelerated forward for the whole laser-plasma interaction process. These electrons using optical and plasma-related self-injection method can be self-organized to remain in the rear of the bubble, where the accelerating electric field is transversely uniform and nearly plateau along the propagation axis. Therefore, the self-injected electron bunch can be accelerated in a steady state without obvious oscillation and has a high quality with narrow energy spread and low divergence.

Keywords:  self-injection      high-quality electron bunch      hollow plasma channel  
Received:  16 November 2018      Revised:  28 January 2019      Accepted manuscript online: 
PACS:  41.75.Jv (Laser-driven acceleration?)  
  42.25.Gy (Edge and boundary effects; reflection and refraction)  
  52.38.Kd (Laser-plasma acceleration of electrons and ions)  

Project supported by the National Natural Science Foundation of China (Grant Nos. 11147005, 61665006, and 61865011) and the Natural Science Foundation of Jiangxi Province of China (Grant Nos. 20151BAB202018, 20161BAB212041, and 20162BCB23012).

Corresponding Authors:  Mingping Liu     E-mail:

Cite this article: 

Suhui Deng(邓素辉), Mingping Liu(刘明萍) Electron self-injection and acceleration in a hollow plasma channel driven by ultrashort intense laser pulses 2019 Chin. Phys. B 28 044101

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