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脉冲磁化自热是影响俘获磁场的重要因素,在超导体中开孔是降低自热的一种有效方法。通过求解基本的超导电磁场和温度场耦合方程,研究了三种频率外磁场作用下,有无中心孔两种情形下外磁场变化过程中超导体中磁场和温度场的变化,结果表明中心孔对于磁场的影响很小,对于温度的影响和超导体中自热引起的温度的最大值的位置有关。
Pulsed magnetization is an important factor that influences the magnetic field of capture. Opening holes in the superconductor is an effective way to reduce the self-heating. By solving the basic coupling equations between superconducting magnetic field and temperature field, the changes of the magnetic field and the temperature field in the superconductor during the change of the external magnetic field under three kinds of external magnetic fields with or without the central hole were studied. The results show that The effect of the magnetic field is small and the effect on temperature is related to the location of the maximum temperature of the self-heating in the superconductor.