Title :
Study on Ic(T, B) for the NbTi strand intended for ITER PF insert coil
Author :
Kozlenkova, Nina I. ; Vedernikov, Gennadi P. ; Shikov, Alexander K. ; Potanina, Ludmila V. ; Filatov, Alexei V. ; Vorobieva, Alexandra E. ; Pantsyrnyi, Viktor I. ; Gubkin, Igor N.
Author_Institution :
Bochvar Res. Inst. of Inorg. Mater., Moscow, Russia
fDate :
6/1/2004 12:00:00 AM
Abstract :
The magnetic field and temperature characteristics Ic(T, B) are important for practical application. This work presents the results of investigations on Ic(T, B) for a strand based on Nb-47.5 wt% Ti alloy. The strand is used in the cable of the ITER PF insert coil, which is under construction. The measurements were carried out in magnetic fields up to 9 T and in the range of temperatures from 4.2 K to 7 K. The critical temperature Tc(B) was determined from voltage-temperature characteristics (VTC) taken in magnetic fields. The temperature dependencies of the upper critical field Bc2(T) were analyzed. By experimental data processing and analysis of literature, relationships describing Bc2(T) and Ic(B, T) dependencies have been defined. Processing programs were used, which allow obtaining all fitting parameters of Ic(T, B) relation.
Keywords :
critical current density (superconductivity); fusion reactors; niobium alloys; superconducting coils; superconducting critical field; superconducting transition temperature; titanium alloys; type II superconductors; 4.2 to 7 K; ITER PF insert coil; NbTi; NbTi strand; Ti alloy; critical current; critical temperature; magnetic field; processing programs; temperature dependency; upper critical field; voltage-temperature characteristics; Coils; Data analysis; Data processing; Magnetic analysis; Magnetic field measurement; Magnetic fields; Temperature dependence; Temperature distribution; Titanium alloys; Voltage; Critical current; NbTi; strand; upper critical field;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830385
