摘要
高能同步辐射光源验证装置(HEPS-TF)插入件系统计划研制一台基于镨铁硼的低温波荡器(CPMU)样机。低温波荡器的最大热负荷预计不超过700 W@80 K,要求低温系统冷却磁铁温度至85 K以下。低温波荡器低温系统采用过冷液氮闭循环迫流冷却的方式,对低温波荡器真空室内磁铁磁极阵列和真空内大梁进行冷却。根据热负荷估算情况,设计主循环流量为12 L/min,分为两条支路分布冷却低温波荡器内上下两排磁铁磁极阵列。根据循环流量对泵的热量、换热器换热能量、流经低温波荡器的液氮平均温度的影响,推导了液氮循环泵的调节策略。
A PrFeB -based cryogenic permanent magnet undulator prototype was under development for High Energy Photon Source - Test Facility. Design working temprature of magnets was below 85 k while the maxmium heat load of CPMU was about 700 W@ 80 K. The design flow rate was 12 L/min. Sub - cooled liquid nitrogen was divided into two parts, flowing through cool- ing channels on each girder respectively. According to the influence of circulation flow rate on the liquid nitrogen temperature through CPMU, heat load of pump and heat flow through heat exchanger, control strategy of liquid circulating pump was derived.
出处
《低温与超导》
CAS
北大核心
2015年第7期14-18,共5页
Cryogenics and Superconductivity
