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Exploring beam size measurement based on the Talbot effect at BEPCII

Vertical beam size measurements were carried out at Beijing Electron–Positron Collider II (BEPCII) using a phase grating and an absorption grating based on the Talbot effect. The transverse coherence of synchrotron radiation is closely related to beam size. Due to the partial coherence of the synchr...

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Autores principales: Zhang, Wan, Zhu, Dechong, Sui, Yanfeng, Yue, Junhui, Cao, Jianshe, He, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10481274/
https://www.ncbi.nlm.nih.gov/pubmed/37610345
http://dx.doi.org/10.1107/S1600577523006355
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author Zhang, Wan
Zhu, Dechong
Sui, Yanfeng
Yue, Junhui
Cao, Jianshe
He, Jun
author_facet Zhang, Wan
Zhu, Dechong
Sui, Yanfeng
Yue, Junhui
Cao, Jianshe
He, Jun
author_sort Zhang, Wan
collection PubMed
description Vertical beam size measurements were carried out at Beijing Electron–Positron Collider II (BEPCII) using a phase grating and an absorption grating based on the Talbot effect. The transverse coherence of synchrotron radiation is closely related to beam size. Due to the partial coherence of the synchrotron radiation source, the coherence length can be calculated by measuring the visibility decay of interferograms recorded at different distances behind the gratings. A vertical beam size of 68.19 ± 2 µm was obtained based on the relationship between the coherence length and beam size at the 3W1 beamline of BEPCII. A comparison of the vertical emittance derived from the grating Talbot method and the synchrotron radiation visible light interferometer method was presented. The vertical emittances from the two methods are 1.41 nm rad and 1.40 nm rad, respectively. The 0.1% difference indicates that the grating Talbot method for beam size measurement is reliable. This technique has great potential for small beam size measurement of fourth-generation synchrotron radiation light sources, considering its small diffraction limitation and simple experimental setups.
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spelling pubmed-104812742023-09-07 Exploring beam size measurement based on the Talbot effect at BEPCII Zhang, Wan Zhu, Dechong Sui, Yanfeng Yue, Junhui Cao, Jianshe He, Jun J Synchrotron Radiat Research Papers Vertical beam size measurements were carried out at Beijing Electron–Positron Collider II (BEPCII) using a phase grating and an absorption grating based on the Talbot effect. The transverse coherence of synchrotron radiation is closely related to beam size. Due to the partial coherence of the synchrotron radiation source, the coherence length can be calculated by measuring the visibility decay of interferograms recorded at different distances behind the gratings. A vertical beam size of 68.19 ± 2 µm was obtained based on the relationship between the coherence length and beam size at the 3W1 beamline of BEPCII. A comparison of the vertical emittance derived from the grating Talbot method and the synchrotron radiation visible light interferometer method was presented. The vertical emittances from the two methods are 1.41 nm rad and 1.40 nm rad, respectively. The 0.1% difference indicates that the grating Talbot method for beam size measurement is reliable. This technique has great potential for small beam size measurement of fourth-generation synchrotron radiation light sources, considering its small diffraction limitation and simple experimental setups. International Union of Crystallography 2023-08-23 /pmc/articles/PMC10481274/ /pubmed/37610345 http://dx.doi.org/10.1107/S1600577523006355 Text en © Wan Zhang et al. 2023 https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Research Papers
Zhang, Wan
Zhu, Dechong
Sui, Yanfeng
Yue, Junhui
Cao, Jianshe
He, Jun
Exploring beam size measurement based on the Talbot effect at BEPCII
title Exploring beam size measurement based on the Talbot effect at BEPCII
title_full Exploring beam size measurement based on the Talbot effect at BEPCII
title_fullStr Exploring beam size measurement based on the Talbot effect at BEPCII
title_full_unstemmed Exploring beam size measurement based on the Talbot effect at BEPCII
title_short Exploring beam size measurement based on the Talbot effect at BEPCII
title_sort exploring beam size measurement based on the talbot effect at bepcii
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10481274/
https://www.ncbi.nlm.nih.gov/pubmed/37610345
http://dx.doi.org/10.1107/S1600577523006355
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