18–26 Sept 2025
Ito International Research Center
Asia/Tokyo timezone

Nb3Sn development for low-beta cavities

WEA02
24 Sept 2025, 08:50
20m
Ito International Research Center

Ito International Research Center

Tokyo
Board: WEA02
Invited Oral Presentation MC3: Cavities Wednesday Oral Session: A

Speaker

Troy Petersen (Argonne National Laboratory)

Description

Nb3Sn has been identified as the most promising next-generation superconducting material for accelerator cavities. This is due to the higher critical temperature of Nb3Sn (Tc = 18 K) compared to niobium (Tc = 9.2 K), which leads to greatly reduced RF losses in the cavity during 4.5 K operation. This allows two important changes during cavity and cryomodule design. First, the higher Tc leads to negligible BCS losses when operated at 4.5 K, which allows for a higher frequency to be used, translating to significantly smaller cavities and cryomodules. Second, the reduced dissipated power lowers the required cryogenic cooling capacity, meaning that cavities can feasibly be operated on 5-10 W cryocoolers instead of a centralized helium refrigeration plant. These plants and distribution systems are costly and complex, requiring skilled technicians for operation and maintenance. These fundamental changes present an opportunity for a paradigm shift in how low-beta linacs are de-signed and operated. Fabrication and testing results of first prototypes are discussed.

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Author

Troy Petersen (Argonne National Laboratory)

Co-authors

Ronald Agustsson (RadiaBeam Technologies (United States)) Grigory Eremeev (Fermi National Accelerator Laboratory) Ben Guilfoyle (Argonne National Laboratory) Mark Kedzie (Argonne National Laboratory) Michael Kelly (Argonne National Laboratory) Sergey Kutsaev (RadiaBeam Technologies (United States)) Sam Posen (Fermi National Accelerator Laboratory) Thomas Reid (Argonne National Laboratory) Edward Spranza (RadiaBeam Technologies (United States)) Nikki Tagdulang (Fermi National Accelerator Laboratory) Brad Tennis (Fermi National Accelerator Laboratory) Shifu Xu (Argonne National Laboratory) Yang Zhou (Argonne National Laboratory)

Presentation materials

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