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对一种YBCO涂层的高温超导带材及其单饼线圈进行了失超传播特性的实验测试与分析。实验测试在77K温度的液氮环境下进行,给带材通入恒定直流电流,使用加热丝给带材上一点提供脉冲热扰动,主要测量了超导带材及单饼线圈失超传播过程中的最小失超能和失超传播速度。实验结果表明YBCO超导带材及其线圈的失超传播速度随电流升高而增大,最小失超能随电流升高而减小,线圈中径向传播速度要远小于纵向传播速度。
An experimental test and analysis on the quench propagation characteristics of a YBCO coated high temperature superconducting tape and its single cake coil were carried out. Experimental tests were carried out at a temperature of 77K in a liquid nitrogen atmosphere. A constant DC current was applied to the strip, and a pulsed heat was applied to the strip at a heating wire to measure the quench propagation of the superconducting tape and the single cake coil The minimum loss of energy and quench propagation speed. The experimental results show that the quench propagation velocity of YBCO superconducting tape and its coil increases with the increase of current, and the minimum loss can decrease with the increase of current. The radial velocity in coil is far less than the longitudinal propagation velocity.