【摘要】 本文用脉冲磁场测量了Nb³Sn和掺TiNb₃Sn线的R-H超导相变。在测量电流小时得到较理想的失超曲线,测到磁流阻和真实的H_c2。 研究了电流大时的热效应。指出不论测量电流的大小,定义磁流阻的起始点为失超点是正确的。本文还讨论了脉冲磁场的感应电压大小与材料的性质和尺寸的关系。更多还原

【Abstract】 The R-H superconducting transition in Nb3Sn alloyed with Ti has been measured under the pulse magnetic field. An ideal superconducting-normal transition curve is obtained when applying a small measured current. The flux flow resistance and the real Hc2 have been determined. We have studied the thermal effect under large currents. It is pointed out that defining the starting point of the flux flow resistance as the S-N transition point is correct, no matter how large the measured current is applied. The relation of the disturbance voltage induced by the pulse magnetic field and the properties and size of the material is also discussed in this paper.更多还原