中文摘要：

对高温超导Bi2223/Ag带材在自场、气冷环境条件下的失超传播速度进行了实验研究,并比较分析了不同传输电流条件下带材失超的最小触发能量。实验结果表明：Bi2223/Ag高温超导带材的失超传播速度范围在0.1—0.6 cm/s,其失超传播速度与传输电流大小有关,与触发能量无关,带材载流越大,失超传播越快;存在最小传输电流48.5 A,带材失超传播在该电流值以下被截止。

英文摘要：

The quench propagation properties of Bi2223/Ag high temperature superconducting tapes were investigated experimentally under the cooling condition of nitrogen gas and in a zero background magnetic field.The minimum quench energy of Bi2223/Ag tapes were compared and analyzed at different carrying currents.The experimental results show that the quench propagation velocity is about 0.1—0.6 cm/s for Bi2223/Ag tapes,it increases with the carrying current and has nothing with the quench energy.The quench propagation velocity can be cut off below 48.5 A.