Title :
Performance evolution of Nb3Sn cable-in-conduit conductors under cyclic load [for Tokamaks]
Author :
Bruzzone, Pierluigi ; Fuchs, Albert M. ; Stepanov, Boris ; Vecsey, Georg
Author_Institution :
CRPP-FT, Villigen, Switzerland
fDate :
3/1/2002 12:00:00 AM
Abstract :
Two subsize, Nb3Sn cable-in-conduit conductors, are tested as short samples in the SULTAN test facility. Transverse load is applied by sweeping up and down the operating current in high background field. A serious performance loss of Ic and n-factor is observed upon cyclic load, with a drop of the critical current, Ic, larger than 30%. The results are critically discussed and compared to similar findings from the literature. The impact of the cyclic load on the Nb3Sn CICC performance must be carefully evaluated in the magnet design.
Keywords :
Tokamak devices; critical currents; fatigue; multifilamentary superconductors; niobium alloys; superconducting cables; superconducting magnets; tin alloys; DC characterization; Lorenz force; Nb3Sn; SULTAN test facility; Tokamak fusion devices; cable-in-conduit conductors; conductor optimization program; critical current; cyclic load; high background field; magnet design; nonrecoverable effects; performance loss; short samples; transverse load; Coils; Conductors; Critical current; Niobium; Plasma temperature; Power cables; Sensor arrays; Superconducting magnets; Testing; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018456
