Title :
A device to evaluate the in-field transport properties of superconductors under strain
Author :
Trociewitz, U.P. ; Walsh, R.P. ; Toplosky, V.J. ; Trociewitz, B. ; Weijers, H.W. ; Miller, J.
Author_Institution :
Nat. High Magnetic Field Lab., Tallahassee, FL, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
A tensile test device has been built to investigate the in-field transport properties of research grade Nb3Sn internal tin superconducting wires under axial strain. The device is operated by a stepper-motor and worm gear assembly and is rated for maximum loads up to 2.5 kN. Tensile strains of 1% can be easily accommodated. The probe is instrumented with vapor-cooled current leads and high temperature superconducting current lead extensions to allow for high transport currents up to 1.5 kA. The setup was operated in the NHMFL large bore resistive magnet in fields up to 20 T. Preliminary tests on short wire samples were carried out. Results of Ic(B,ε) measurements at 4.2 K and n-values are presented.
Keywords :
critical current density (superconductivity); mechanical stability; niobium alloys; strain ageing; superconducting tapes; tensile testing; tin alloys; 4.2 K; Nb3Sn; axial strain; critical current; current leads; internal tin superconducting wires; mechanical property; n-values; resistive magnet; stepper-motor; superconducting current lead; superconductors; tensile strains; transport property; worm gear assembly; Capacitive sensors; Gears; High temperature superconductors; Niobium; Superconducting devices; Superconducting filaments and wires; Superconducting magnets; Tensile strain; Testing; Tin; Critical current; mechanical properties; strain; superconductors; transport properties;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849057
