Ultra-Fine Nb3Al Mono-Core Wires and Cables
| Autor: | Yasuo Iijima, Jun Nagamatsu, Masaru Yamamoto, Akihiro Kikuchi, Ataru Ichinose, Shigeki Nimori, Masato Otsubo, Masahiko Kawano, Motoyoshi Kimura, Kiyosumi Tsuchiya |
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| Rok vydání: | 2021 |
| Předmět: |
Rutherford cable
Materials science Diffusion Composite number chemistry.chemical_element Superconducting magnet Condensed Matter Physics Copper Electronic Optical and Magnetic Materials law.invention Metal Core (optical fiber) chemistry law visual_art Lamination visual_art.visual_art_medium Electrical and Electronic Engineering Composite material |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 31:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| Popis: | Jelly-roll (JR) processed wires using metal thin foils as starting materials have excellent cold workability and drawability. We have successfully fabricated Nb/Al composite mono-core wires having 50 μm in outer diameter and over 400 meters in length. Furthermore, some of the wires were additionally drawn to 30 μm in outer diameter. It is known that the critical current density ( J c) of Nb3Al synthesized by low-temperature diffusion reactions increases with decreasing the diffusion distance between Nb and Al. In this study, we have confirmed that J c would increase with decreasing the wire diameter, and the maximum J c has been obtained on Nb3Al wires with 30 μm in diameter. In addition, a 7-wire round cable has also been demonstrated using 80 μm diameter wire, with an I c 7 times the I c of a single wire. A transport current test was performed for the cable sample simulating W&R and R&W processes using a 50 mm diameter G10 holder. There were no differences between the I c and the n-values in the W&R and R&W processes. Moreover, as a feasibility study, a 3rd bundle Rutherford cable has been successfully fabricated using 3,108 pure copper wires 50 μm in diameter. |
| Databáze: | OpenAIRE |
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