Development of a novel approach for construction of high gradient braze-free S-band cavities

Abstract Vacuum breakdown is one of the main limitations to the operating accelerating gradient in radio frequency linear accelerators. Recent studies of copper cavities have been shown that harder copper conditions more quickly and can reach higher accelerating gradients than soft copper cavities....

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Autores principales:	Mahdi Aghayan, S. Farhad Masoudi, Farshad Ghasemi, Walter Wuensch, Hamed Shaker
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/93e598cdbf9245ac994b9817d22e1ecd
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spelling	oai:doaj.org-article:93e598cdbf9245ac994b9817d22e1ecd2021-12-02T15:15:13ZDevelopment of a novel approach for construction of high gradient braze-free S-band cavities10.1038/s41598-021-98238-82045-2322https://doaj.org/article/93e598cdbf9245ac994b9817d22e1ecd2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98238-8https://doaj.org/toc/2045-2322Abstract Vacuum breakdown is one of the main limitations to the operating accelerating gradient in radio frequency linear accelerators. Recent studies of copper cavities have been shown that harder copper conditions more quickly and can reach higher accelerating gradients than soft copper cavities. Exploiting this advantage requires the development of assembly methods that do not involve the copper-softening high-temperature heating cycles that are used in for example bonding and brazing. A shrink-fit method, which was already implemented successfully in the operation the IPM linac, is proposed for the construction high-gradient test S-band standing wave structure operating at 2998.5 MHz. The three cells cavity is designed to have a maximum gradient in the middle cell that is twice that of the adjacent cells. Mechanical considerations relating to the shrink-fit construction method have been performed using Ansys. To validate the simulations and ensure the feasibility of construction by shrink-fit method, a sample cavity was constructed and cold tests was performed.Mahdi AghayanS. Farhad MasoudiFarshad GhasemiWalter WuenschHamed ShakerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mahdi Aghayan S. Farhad Masoudi Farshad Ghasemi Walter Wuensch Hamed Shaker Development of a novel approach for construction of high gradient braze-free S-band cavities
description	Abstract Vacuum breakdown is one of the main limitations to the operating accelerating gradient in radio frequency linear accelerators. Recent studies of copper cavities have been shown that harder copper conditions more quickly and can reach higher accelerating gradients than soft copper cavities. Exploiting this advantage requires the development of assembly methods that do not involve the copper-softening high-temperature heating cycles that are used in for example bonding and brazing. A shrink-fit method, which was already implemented successfully in the operation the IPM linac, is proposed for the construction high-gradient test S-band standing wave structure operating at 2998.5 MHz. The three cells cavity is designed to have a maximum gradient in the middle cell that is twice that of the adjacent cells. Mechanical considerations relating to the shrink-fit construction method have been performed using Ansys. To validate the simulations and ensure the feasibility of construction by shrink-fit method, a sample cavity was constructed and cold tests was performed.
format	article
author	Mahdi Aghayan S. Farhad Masoudi Farshad Ghasemi Walter Wuensch Hamed Shaker
author_facet	Mahdi Aghayan S. Farhad Masoudi Farshad Ghasemi Walter Wuensch Hamed Shaker
author_sort	Mahdi Aghayan
title	Development of a novel approach for construction of high gradient braze-free S-band cavities
title_short	Development of a novel approach for construction of high gradient braze-free S-band cavities
title_full	Development of a novel approach for construction of high gradient braze-free S-band cavities
title_fullStr	Development of a novel approach for construction of high gradient braze-free S-band cavities
title_full_unstemmed	Development of a novel approach for construction of high gradient braze-free S-band cavities
title_sort	development of a novel approach for construction of high gradient braze-free s-band cavities
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/93e598cdbf9245ac994b9817d22e1ecd
work_keys_str_mv	AT mahdiaghayan developmentofanovelapproachforconstructionofhighgradientbrazefreesbandcavities AT sfarhadmasoudi developmentofanovelapproachforconstructionofhighgradientbrazefreesbandcavities AT farshadghasemi developmentofanovelapproachforconstructionofhighgradientbrazefreesbandcavities AT walterwuensch developmentofanovelapproachforconstructionofhighgradientbrazefreesbandcavities AT hamedshaker developmentofanovelapproachforconstructionofhighgradientbrazefreesbandcavities
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Development of a novel approach for construction of high gradient braze-free S-band cavities

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