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Title: Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons

Abstract

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 × 10{sup 21} s{sup −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.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
Publication Date:
OSTI Identifier:
22599064
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANNIHILATION; DENSITY; ELECTRONS; JETS; KINETICS; LASERS; MEV RANGE; POSITRON BEAMS; POSITRON SOURCES; POSITRONS; PULSES; TIME RESOLUTION; POSITRON ANNIHILATION SPECTROSCOPY

Citation Formats

Xu, Tongjun, Shen, Baifei, Xu, Jiancai, Li, Shun, Yu, Yong, Li, Jinfeng, Lu, Xiaoming, Wang, Cheng, Wang, Xinliang, Liang, Xiaoyan, Leng, Yuxin, Li, Ruxin, and Xu, Zhizhan. Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons. United States: N. p., 2016. Web. doi:10.1063/1.4943280.
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. Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons. United States. doi:10.1063/1.4943280.
Xu, Tongjun, Shen, Baifei, Xu, Jiancai, Li, Shun, Yu, Yong, Li, Jinfeng, Lu, Xiaoming, Wang, Cheng, Wang, Xinliang, Liang, Xiaoyan, Leng, Yuxin, Li, Ruxin, and Xu, Zhizhan. Tue . "Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons". United States. doi:10.1063/1.4943280.
@article{osti_22599064,
title = {Ultrashort megaelectronvolt positron beam generation based on laser-accelerated electrons},
author = {Xu, Tongjun and Shen, Baifei and Xu, Jiancai and Li, Shun and Yu, Yong and Li, Jinfeng and Lu, Xiaoming and Wang, Cheng and Wang, Xinliang and Liang, Xiaoyan and Leng, Yuxin and Li, Ruxin and Xu, Zhizhan},
abstractNote = {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 × 10{sup 21} s{sup −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.},
doi = {10.1063/1.4943280},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 3,
volume = 23,
place = {United States},
year = {2016},
month = {3}
}