稳态强磁场实验装置水冷磁体运行水质变化探究

Water quality analysis for operating resistive magnet

通过研究磁体静置及大流量循环时的电阻率变化,发现经大流量循环的磁体水质下降速率远大于静置时的磁体。分析循环管路上过滤器滤网上的粉末成分,探究了电阻率下降的原因。经测定,粉末主要成分为铜和银,而磁体比特片采用铜银合金表面镀银工艺,大流量循环会对磁体造成剥蚀。实验证明提纯比例达到6%的提纯系统可迅速提升循环水水质,且可有效确保电阻率在高场实验中保持15 MΩ·cm以上。

In this paper,the changes of water resistivity are studied between a static magnet and a magnet with large flow cycling.It was found that the water resistivity of the static magnet decreased much slower than the cycling one.The reason of resistivity decline was investigated by analyzing the powder attached to the strainer of the filter.The main ingredients of the powder adhered on the strainer were Cu and Ag,while the component of the bitter disks is Cu-Ag-Alloy with Ag electroplated on the surface,and the large flow cycling would bring denudation to the magnet.It is further verified that the purification system with a ratio of 6%of the flow can improve the water resistivity rapidly,and the resistivity of water can maintain at more than 15 MΩ·cm in high magnetic experiment utilizing the purification system.