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Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP

Undulators are important devices for accelerator-based light sources whose magnetic field quality determines the photon beam performance. Superconducting-type undulators have been developing rapidly in recent years around the world. The insertion device group at the Institute of High Energy Physics...

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Autores principales: Wei, Junhao, Li, Yuhui, Yang, Xiangchen, Chen, Zilin, Zhang, Xiangzhen, Bian, Xiaojuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9255567/
https://www.ncbi.nlm.nih.gov/pubmed/35787566
http://dx.doi.org/10.1107/S1600577522006166
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author Wei, Junhao
Li, Yuhui
Yang, Xiangchen
Chen, Zilin
Zhang, Xiangzhen
Bian, Xiaojuan
author_facet Wei, Junhao
Li, Yuhui
Yang, Xiangchen
Chen, Zilin
Zhang, Xiangzhen
Bian, Xiaojuan
author_sort Wei, Junhao
collection PubMed
description Undulators are important devices for accelerator-based light sources whose magnetic field quality determines the photon beam performance. Superconducting-type undulators have been developing rapidly in recent years around the world. The insertion device group at the Institute of High Energy Physics (IHEP) in China started an R&D project to develop prototypes of superconducting undulators (SCUs). A half-meter-long planar SCU has been produced recently. The SCU was designed based on the simulation program OPERA-3D giving a period length of 15 mm and a gap of 7 mm. This prototype was manufactured and fabricated precisely, and was then tested by vertically submerging in liquid helium in a Dewar. After quench training several times, the maximum current in the main coils reached 480 A. The magnetic field was measured by Hall probes mounted on a sledge in the middle of the undulator gap. The peak magnetic field reached 1 T. The measurement results indicate that correction coils with suitable current can not only optimize the magnetic first and second integrals but also reduce the phase error, which is expected by design.
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spelling pubmed-92555672022-07-14 Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP Wei, Junhao Li, Yuhui Yang, Xiangchen Chen, Zilin Zhang, Xiangzhen Bian, Xiaojuan J Synchrotron Radiat Research Papers Undulators are important devices for accelerator-based light sources whose magnetic field quality determines the photon beam performance. Superconducting-type undulators have been developing rapidly in recent years around the world. The insertion device group at the Institute of High Energy Physics (IHEP) in China started an R&D project to develop prototypes of superconducting undulators (SCUs). A half-meter-long planar SCU has been produced recently. The SCU was designed based on the simulation program OPERA-3D giving a period length of 15 mm and a gap of 7 mm. This prototype was manufactured and fabricated precisely, and was then tested by vertically submerging in liquid helium in a Dewar. After quench training several times, the maximum current in the main coils reached 480 A. The magnetic field was measured by Hall probes mounted on a sledge in the middle of the undulator gap. The peak magnetic field reached 1 T. The measurement results indicate that correction coils with suitable current can not only optimize the magnetic first and second integrals but also reduce the phase error, which is expected by design. International Union of Crystallography 2022-06-23 /pmc/articles/PMC9255567/ /pubmed/35787566 http://dx.doi.org/10.1107/S1600577522006166 Text en © Junhao Wei et al. 2022 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
Wei, Junhao
Li, Yuhui
Yang, Xiangchen
Chen, Zilin
Zhang, Xiangzhen
Bian, Xiaojuan
Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP
title Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP
title_full Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP
title_fullStr Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP
title_full_unstemmed Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP
title_short Development and magnetic field measurement of a 0.5-m-long superconducting undulator at IHEP
title_sort development and magnetic field measurement of a 0.5-m-long superconducting undulator at ihep
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9255567/
https://www.ncbi.nlm.nih.gov/pubmed/35787566
http://dx.doi.org/10.1107/S1600577522006166
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