WEOGC1

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URL	https://doi.org/10.18429/JACoW-IPAC2023-WEOGC1
Title	The need for Nb3Sn coated Cu cavities for future accelerators
Authors	E. Barzi Fermi National Accelerator Laboratory A. Kikuchi National Institute for Materials Science B. Barish California Institute of Technology E. Nanni SLAC H. Ito, H. Monjushiro, H. Hayano, T. Kubo High Energy Accelerator Research Organization H. Hama, S. Kashiwagi Tohoku University M. Nasr, M. Ross, M. Schneider, P. Welander, S. Tantawi SLAC National Accelerator Laboratory M. Inman, R. Radhakrishnan, T. Hall Faraday Technology, Inc. P. Carriere RadiaBeam Technologies R. Rimmer Thomas Jefferson National Accelerator Facility W. Barletta Massachusetts Institute of Technology
Abstract	Based on current efforts in the U.S. on the novel concept of parallel-feed RF accelerator structures, and in the U.S. and abroad in producing Nb3Sn films on either Cu or bronze, we rec-ommend that the Particle Physics community foster R&D in Superconducting Nb3Sn coated Cu RF Cavities instead of costly bulk Nb. The paper includes methods to process the coated cavi-ties at temperatures consistent with Cu retaining its shape. A devoted global effort in develop-ing Cu cavity structures coated with Nb3Sn would make the ILC or Higgs factories more afforda-ble and more likely to be built. Not only do parallel-feed RF structures enable both higher ac-celerating gradients and higher efficiencies, but they would be applicable to both Cu and Nb3Sn coated Cu cells. Increased effort on these two techniques would synergize expenditures to-wards progress, which will converge on the choice of technology for the RF of an ILC or any fu-ture accelerator. The current methods of Nb3Sn coatings on Cu or bronze can be geared also towards standard cavity cells. In conclusion, the use of distributed coupling structure topology within improved performance parameters together with Nb3Sn coating technology can lead to a paradigm shift for superconducting linacs, with higher gradient, higher temperature of opera-tion, and reduced overall costs for any future collider.
Paper	download: WEOGC1.pdf
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Conference	14th International Particle Accelerator Conference
Series
Location	Venice, Italy
Date	07-12 May 2023
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Ralph Assmann - Deutsches Elektronen-Synchrotron DESY Peter McIntosh - Science and Technology Facilities Council (STFC/DL/ASTeC) Giovanni Bisoffi - Istituto Nazionale di Fisica Nucleare (INFN/LNL) Alessandro Fabris - Elettra-Sincrotrone Trieste S.C.p.A. Ivan Andrian - Elettra-Sincrotrone Trieste S.C.p.A. Giulia Vinicola - Istituto Nazionale di Fisica Nucleare (INFN/LNF)
Online ISBN	978-3-95450-231-8
Online ISSN	2673-5490
Received	04 May 2023
Revised	05 June 2023
Accepted	23 June 2023
Issued	26 September 2023
DOI	10.18429/JACoW-IPAC2023-WEOGC1
Pages	2639-2641
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.