Commissioning of Dedicated Furnace for Nb3Sn Coatings of 2.6 GHz Single Cell Cavities

2); (2) IIT; B. Tennis (1); Chicago); G. Eremeev (1); J. Zasadzinski (2) ((1) Fermilab; P.A. Kulyavtsev (1; S. Posen (1)

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Commissioning of Dedicated Furnace for Nb3Sn Coatings of 2.6 GHz Single Cell Cavities

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arxiv 2307.08844 v1 pith:5SDPYS3C submitted 2023-07-17 physics.acc-ph

P.A. Kulyavtsev (1 , 2) , G. Eremeev (1) , S. Posen (1) , B. Tennis (1) , J. Zasadzinski (2) ((1) Fermilab , (2) IIT , Chicago) This is my paper · ORCID

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We present the results of commissioning a dedicated furnace for Nb3Sn coatings of 2.6 GHz single cell cavities. Nb3Sn is a desired coating due to its high critical temperature and smaller surface resistance compared to bulk Nb. Usage of Nb3Sn coated cavities will greatly reduce operating costs due to decreased dependance on cryo cooling. Tin is deposited by use of a tin chloride nucleation agent and tin vapor diffusion. Analysis of the resultant coating was performed using SEM/EDS to verify successful formation of Nb3Sn. Witness samples in line of sight of the source were used in order to understand the coating efficacy.

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