摘要
在低温脉冲磁体中,由于导体热容量减小,因此在脉冲期间,绕组的温度和电阻都将明显地增加,这就使电流和温升的计算复杂化了。忽略脉冲期间的传热,给出导体电阻率 ρθ和电阻率与比热之比 ρθ/Sθ 随温度变化的关系,便可计算出脉冲磁体电流和温升随时间的变化。以一个液氮预冷的铜导体脉冲磁体为例,给出了计算的具体方法和结果。
During pulse duration, because of the decrease in the heat capacity of cryogenic pulsed magnet, the temperature and the resistance of the magnet increase so rapidly that they are computed to be more complex. If we neglect the heat transfer during pulse duration and give the temperature dependence of resistivety ρθ and of ratio of resistivety to s-pecific heat ρθ/S, we can calculate the time dependence of the current and of the temperature in the cryogenic pulsed magnet. As a sample, we have given the method of the calculation and results for LN2 precooling pulsed magnet using the copper conductor.
出处
《低温与超导》
CAS
CSCD
北大核心
1990年第2期62-66,共5页
Cryogenics and Superconductivity
