一、引言“锻炼效应”是指超导磁体在第一次充电时不能达到它的最大工作电流值,必须经多次充电和常态转变的“锻炼”,才能逐步提高工作电流,最后达到最大电流值。这个问题是超导磁体设计中的不确定因素。在磁体运行中,很不希望发生“锻炼”效 First, the introduction of “exercise effect” refers to the first charge of superconducting magnet can not reach its maximum operating current value, must be repeated charge and normal change “exercise” in order to gradually increase the working current, and finally to reach the maximum current value. This problem is an uncertain factor in the design of superconducting magnets. In the magnet operation, it is very undesirable to “exercise” effect