Title :
Development of Nb3Al Wires With High Critical Current Density for Future Accelerator Magnets
Author :
Mitsuda, C. ; Tsuchiya, K. ; Terashima, A. ; Takeuchi, T. ; Banno, N. ; Nimori, S. ; Kikuchi, A. ; Iijima, Y. ; Seki, Y.. ; Ohno, M.. ; Okamoto, K.. ; Takao, T. ; Nakamura, K. ; Tagawa, K.
Author_Institution :
High Energy Accel. Res. Organ. KEK, Tsukuba
fDate :
6/1/2007 12:00:00 AM
Abstract :
Recent studies of RHQ-processed Nb3Al wires for future accelerator magnets are presented and discussed. Test wires were prepared with different fabrication parameters, such as the Nb matrix ratio, RHQ current, area reduction ratio of the wire after an RHQ treatment and the 2nd heat treatment condition. Measurements of the critical current density (Jc) and n-value have been performed during the past several years. Recently, we performed the critical temperature (Tc) measurement, and the relationship between Jc and Tc was investigated by an RHQ treatment, a 2nd heat treatment, the Nb matrix ratio, and the area reduction effect.
Keywords :
aluminium alloys; critical current density (superconductivity); niobium alloys; quenching (thermal); superconducting materials; superconducting transition temperature; Nb3Al - Binary; accelerator magnets; critical current density; critical temperature; fabrication parameters; heat treatment; n-value; quenching; rapid heating; reduction ratio; wires; Accelerator magnets; Critical current density; Current measurement; Density measurement; Fabrication; Heat treatment; Niobium; Performance evaluation; Testing; Wires; ${rm Nb}_{3}{rm Al}$ wire; Accelerator magnets; critical current density; critical temperature; rapid heating and quenching process;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.899006
