ITER超导股线的力学性能测试

介绍了Pacman装置的设计原理，用Pacman装置测量了OST公司通过内锡法工艺制备的Nb₃Sn超导股线在12T，4.2K条件下单轴方向的临界电流与应变的关系，应变的范围在-0.8%～+0.6%。用偏量比例模型模拟了临界电流与轴向应变之间的规律，分析了随应变的改变n值的变化，得出了Nb₃Sn超导股线对应变的敏感程度。

Test of ITER superconduct strand's mechanical properties

Design theory of the Pacman equipment was introduced and characteristic curves of critical current and strain of Nb₃Sn strands processed by the OST company with internal tin were described. The Nb₃Sn strands were measured in the axial strain range from -0.8%～+0.6% at 4.2K and 12T by the Pacman equipment. The scaling law between critical current and axial strain was simulated with the improved deviatoric scaling model. The relation between n value and the axial strain was analyzed, and the Nb₃Sn strands’ sensitivity to strain was concluded.