Title :
Nb3Al strand processing, transport properties, and cabling
Author :
Sumption, M.D. ; Buta, F. ; Tomsic, M. ; Austen, A. ; Gregory, E. ; Rudziak, M. ; Wong, T. ; Motowidlo, L. ; Hascicek, Y. ; Scanlan, R.M. ; Higley, H. ; Collings, E.W.
Author_Institution :
Ohio State Univ., Columbus, OH, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
Nb3Al strands with four different designs have been processed and tested. Strand specifications and some generic aspects of strand fabrication, processing, and testing are described. One strand type was long-length RHQT processed and transport tested at various lengths. Transport Jc results for short samples and small solenoid coils are presented and discussed for various RHQT protocols. Critical current measurements on various strands have been performed in fields from 18 to 26 T. Various strand stabilization techniques have been investigated including electroplating, plasma spray coating, and direct Nb-Cu high temperature diffusion bonding; these results are described. Fifty meters of strand was RHQ processed and then cabled into a short length of experimental 12-strand Nb3Al Rutherford cable in preparation for transformation (T) and testing. Cabling properties are described.
Keywords :
aluminium alloys; critical current density (superconductivity); niobium alloys; superconducting cables; superconducting coils; 18 to 26 T; Nb-Cu; Nb3Al; Nb3Al strand processing; Rutherford cable; critical current density; direct Nb-Cu high temperature diffusion bonding; electroplating; long-length RHQT processing; plasma spray coating; solenoid coil; stabilization; transformation testing; transport properties; Coils; Fabrication; Niobium; Plasma measurements; Plasma temperature; Process design; Solenoids; Testing; Thermal spraying; Transport protocols;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812359
