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Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging
The recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4835856/ https://www.ncbi.nlm.nih.gov/pubmed/27090440 http://dx.doi.org/10.1038/srep24622 |
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author | Golovin, G. Banerjee, S. Liu, C. Chen, S. Zhang, J. Zhao, B. Zhang, P. Veale, M. Wilson, M. Seller, P. Umstadter, D. |
author_facet | Golovin, G. Banerjee, S. Liu, C. Chen, S. Zhang, J. Zhao, B. Zhang, P. Veale, M. Wilson, M. Seller, P. Umstadter, D. |
author_sort | Golovin, G. |
collection | PubMed |
description | The recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it can grow due to the effects of space charge during free-space propagation. Direct experimental measurement of this important property is complicated by micron-scale beam sizes, and the presence of intense fields at the location where space charge acts. Reported here is a novel, non-destructive, single-shot method that overcame this problem. It employed an intense laser probe pulse, and spectroscopic imaging of the inverse-Compton scattered x-rays, allowing measurement of an ultra-low value for the normalized transverse emittance, 0.15 (±0.06) π mm mrad, as well as study of its subsequent growth upon exiting the accelerator. The technique and results are critical for designing multi-stage laser-wakefield accelerators, and generating high-brightness, spatially coherent x-rays. |
format | Online Article Text |
id | pubmed-4835856 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48358562016-04-27 Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging Golovin, G. Banerjee, S. Liu, C. Chen, S. Zhang, J. Zhao, B. Zhang, P. Veale, M. Wilson, M. Seller, P. Umstadter, D. Sci Rep Article The recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it can grow due to the effects of space charge during free-space propagation. Direct experimental measurement of this important property is complicated by micron-scale beam sizes, and the presence of intense fields at the location where space charge acts. Reported here is a novel, non-destructive, single-shot method that overcame this problem. It employed an intense laser probe pulse, and spectroscopic imaging of the inverse-Compton scattered x-rays, allowing measurement of an ultra-low value for the normalized transverse emittance, 0.15 (±0.06) π mm mrad, as well as study of its subsequent growth upon exiting the accelerator. The technique and results are critical for designing multi-stage laser-wakefield accelerators, and generating high-brightness, spatially coherent x-rays. Nature Publishing Group 2016-04-19 /pmc/articles/PMC4835856/ /pubmed/27090440 http://dx.doi.org/10.1038/srep24622 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Golovin, G. Banerjee, S. Liu, C. Chen, S. Zhang, J. Zhao, B. Zhang, P. Veale, M. Wilson, M. Seller, P. Umstadter, D. Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
title | Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
title_full | Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
title_fullStr | Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
title_full_unstemmed | Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
title_short | Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
title_sort | intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4835856/ https://www.ncbi.nlm.nih.gov/pubmed/27090440 http://dx.doi.org/10.1038/srep24622 |
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