外文题目: Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons
作者: Xu, Tongjun; Shen, Baifei; Xu, Jiancai; Li, Shun; Yu, Yong; Li, Jinfeng; Lu, Xiaoming; Wang, Cheng; Wang, Xinliang; Liang, Xiaoyan; Leng, Yuxin; Li, Ruxin; Xu, Zhizhan
刊名: Phys. Plasmas
年: 2016 卷: 23 期: 3 文章编号：33109
英文关键词:

PULSES; PLASMA
英文摘要:
Experimental generation of ultrashort MeV positron beams with high intensity and high density using a compact laser-driven setup is reported. A high-density gas jet is employed experimentally to generate MeV electrons with high charge; thus, a charge-neutralized MeV positron beam with high density is obtained during laser-accelerated electrons irradiating high-Z solid targets. It is a novel electron-positron source for the study of laboratory astrophysics. Meanwhile, the MeV positron beam is pulsed with an ultrashort duration of tens of femtoseconds and has a high peak intensity of 7.8 x 10(21) s(-1), thus allows specific studies of fast kinetics in millimeter-thick materials with a high time resolution and exhibits potential for applications in positron annihilation spectroscopy. (C) 2016 AIP Publishing LLC.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1063/1.4943280


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