YBCO高温超导带材失超传播特性研究

Study on the quench propagation properties of YBCO HTS tapes

对YBCO高温超导带材的失超传播建立数学模型并推导了其失超传播速度理论计算公式,在此基础上,在自场、气冷环境下对YBCO带材的失超传播特性进行了实验研究。研究结果表明:YBCO高温超导带材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18.6A,YBCO带材失超传播在该电流以下时被截止。

The mathematical model about quench propagation of YBCO high temperature superconducting tapes was established, and the formula of its quench propagation velocity was also deduced. On this basis, the quench propagation properties of YBCO high temperature superconducting tapes were investigated experimentally under the coohng condition of nitrogen gas and in self - magnetic field. Experiment results showed that the quench propagation velocity of tapes was increased with the carrying current and independent of quench energy. The minimum normal - zone propagation current of 18.6A was measured.