Test Results of the Third Japanese SULTAN Sample

Many full size conductors for the ITER TF coils have been tested at the SULTAN test facility in Switzerland for conductor qualification. JAEA tested two samples and two kinds of Nb3Sn strands were evaluated through the tests. Now another sample named JATF3 has been tested, which uses two other kinds of Nb3Sn strands. The strands satisfy the critical current density Jc requirement, but results of the conductor test were lower than our expectation. After the test, JAEA has been investigating the reason by X-ray CT scan and destructive inspection, and has found a possible reason.

[1]  T. Hemmi,et al.  Performance of Japanese $\hbox{Nb}_{3}\hbox{Sn}$ Conductors for ITER Toroidal Field Coils , 2008, IEEE Transactions on Applied Superconductivity.

[2]  Y. Nunoya,et al.  Characterization of ITER $\hbox{Nb}_{3}\hbox{Sn}$ Strands Under Strain-Applied Conditions , 2008, IEEE Transactions on Applied Superconductivity.

[3]  K. Okuno.  Progress in the superconducting magnet technology through the ITER CS model coil programme , 2004, IEEE Transactions on Applied Superconductivity.

[4]  E. Salpietro,et al.  Results of a New Generation of ITER TF Conductor Samples in SULTAN , 2008, IEEE Transactions on Applied Superconductivity.