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| TUPTB052 |
A Novel Manufacture of Niobium SRF Cavities by Cold Spray |
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- M. Yamanaka
KEK, Ibaraki, Japan
- K. Shimada
Nihon University, College of Engineering, Koriyama, Japan
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Cold spray is a lower-temperature solid-state thermal spray process that deposits metal powder using a heated inert gas through a supersonic nozzle. When the material hits at supersonic speed and reaches the critical speed, the particles themselves are plastically deformed to form a film. The material of the superconducting cavity is niobium, a very expensive rare metal. To reduce the amount of niobium and the cost, we propose a novel manufacturing method of forming a thick niobium film on the surface of a mandrel by cold spray using niobium powder and removing the mandrel to finish a hollow shape. We confirmed the feasibility of the proposed method using a model similar to a 3.9 GHz one-cell cavity. Also, the RRR measurement of the niobium specimen made by cold spray was carried out and the measured value of 11 was obtained. We report on these results.
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-SRF2023-TUPTB052
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| About • |
Received ※ 17 June 2023 — Revised ※ 24 June 2023 — Accepted ※ 29 June 2023 — Issue date ※ 10 July 2023 |
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