Abstract
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 (Jc) 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 Jc would increase with decreasing the wire diameter, and the maximum Jc 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 Ic 7 times the Ic 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 Ic 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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
