Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target

Laser-driven positron production is expected to provide a non-radioactive, controllable, radiation tunable positron source in laboratories. We propose a novel approach of positron production by using a femto-second laser irradiating a microstructured surface target combined with a high-Z converter....

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Detalles Bibliográficos
Autores principales: Wang, Ye-Chen, Yin, Yan, Wang, Wei-Quan, Zou, De-Bin, Miao, Wen-Xuan, Yu, Tong-Pu, Shao, Fu-Qiu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7125301/
https://www.ncbi.nlm.nih.gov/pubmed/32245986
http://dx.doi.org/10.1038/s41598-020-61964-6
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author Wang, Ye-Chen
Yin, Yan
Wang, Wei-Quan
Zou, De-Bin
Miao, Wen-Xuan
Yu, Tong-Pu
Shao, Fu-Qiu
author_facet Wang, Ye-Chen
Yin, Yan
Wang, Wei-Quan
Zou, De-Bin
Miao, Wen-Xuan
Yu, Tong-Pu
Shao, Fu-Qiu
author_sort Wang, Ye-Chen
collection PubMed
description Laser-driven positron production is expected to provide a non-radioactive, controllable, radiation tunable positron source in laboratories. We propose a novel approach of positron production by using a femto-second laser irradiating a microstructured surface target combined with a high-Z converter. By numerical simulations, it is shown that both the temperature and the maximum kinetic energy of electrons can be greatly enhanced by using a microstructured surface target instead of a planar target. When these energetic electrons shoot into a high Z converter, copious positrons are produced via Bethe-Heitler mechanism. With a laser (wavelength λ = 1 μm) with duration ~36 fs, intensity ~5.5 × 10(20) W/cm(2) and energy ~6 Joule, ~10(9) positrons can be obtained.
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spelling pubmed-71253012020-04-11 Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target Wang, Ye-Chen Yin, Yan Wang, Wei-Quan Zou, De-Bin Miao, Wen-Xuan Yu, Tong-Pu Shao, Fu-Qiu Sci Rep Article Laser-driven positron production is expected to provide a non-radioactive, controllable, radiation tunable positron source in laboratories. We propose a novel approach of positron production by using a femto-second laser irradiating a microstructured surface target combined with a high-Z converter. By numerical simulations, it is shown that both the temperature and the maximum kinetic energy of electrons can be greatly enhanced by using a microstructured surface target instead of a planar target. When these energetic electrons shoot into a high Z converter, copious positrons are produced via Bethe-Heitler mechanism. With a laser (wavelength λ = 1 μm) with duration ~36 fs, intensity ~5.5 × 10(20) W/cm(2) and energy ~6 Joule, ~10(9) positrons can be obtained. Nature Publishing Group UK 2020-04-03 /pmc/articles/PMC7125301/ /pubmed/32245986 http://dx.doi.org/10.1038/s41598-020-61964-6 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wang, Ye-Chen
Yin, Yan
Wang, Wei-Quan
Zou, De-Bin
Miao, Wen-Xuan
Yu, Tong-Pu
Shao, Fu-Qiu
Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
title Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
title_full Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
title_fullStr Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
title_full_unstemmed Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
title_short Copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
title_sort copious positron production by femto-second laser via absorption enhancement in a microstructured surface target
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7125301/
https://www.ncbi.nlm.nih.gov/pubmed/32245986
http://dx.doi.org/10.1038/s41598-020-61964-6
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