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Betatron radiation polarization control by using an off-axis ionization injection in a laser wakefield acceleration

Authors :
Min Chen
Tong-Pu Yu
X. H. Yang
Feng Liu
De-Bin Zou
Fu-Qiu Shao
Yan-Yun Ma
Suming Weng
Zheng-Ming Sheng
Guo-Bo Zhang
Source :
Optics Express. 28:29927
Publication Year :
2020
Publisher :
Optica Publishing Group, 2020.

Abstract

Tunable X-ray sources from a laser-driven wakefield have wide applications. However, due to the difficulty of electron dynamics control, currently the tunability of laser wakefield–based X-ray sources is still difficult. By using three-dimensional particle-in-cell simulations, we propose a scheme to realize controllable electron dynamics and X-ray radiation. In the scheme, a long wavelength drive pulse excites a plasma wake and an off-axis laser pulse with a short wavelength co-propagates with the drive pulse and ionizes the K-shell electrons of the background high-Z gas. The electrons can be injected in the wakefield with controllable transverse positions and residual momenta. These injected electrons experience controllable oscillations in the wake, leading to tunable radiations both in intensity and polarization.

Details

ISSN :
10944087
Volume :
28
Database :
OpenAIRE
Journal :
Optics Express
Accession number :
edsair.doi.dedup.....72b959bd85585b824f84469c7b023730