Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons

被引：54

作者：

Xu, Tongjun ^{[1
]}

Shen, Baifei ^{[1
]}

Xu, Jiancai ^{[1
]}

Li, Shun ^{[1
]}

Yu, Yong ^{[1
]}

Li, Jinfeng ^{[1
]}

Lu, Xiaoming ^{[1
]}

Wang, Cheng ^{[1
]}

Wang, Xinliang ^{[1
]}

Liang, Xiaoyan ^{[1
]}

Leng, Yuxin ^{[1
]}

Li, Ruxin ^{[1
]}

Xu, Zhizhan ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 03期

基金：

中国国家自然科学基金;

关键词：

PULSES;

D O I：

10.1063/1.4943280

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

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.

引用

页数：5

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