上海光源光束线液氮单色器真空夹层抽气系统设计  

Design of Automatic Pumping System for Liquid Nitrogen Cooling Monochromators of SSRF

作　　者：王进伟 李津铭 刘俊男 陈明 WANG Jin-wei;LI Jin-ming;LIU Jun-nan;CHEN Ming(Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China;Shanghai Synchrotron Radiation Facility,Shanghai 201204,China)

机构地区：[1]中国科学院上海高等研究院,上海201204 [2]上海同步辐射光源,上海201204

出　　处：《真空》2023年第5期66-69,共4页Vacuum

摘　　要：针对上海光源部分光束线液氮单色器真空夹层真空度下降、液氮管路冷量损失引发夹层外壁冷凝滴水、结霜等威胁运行安全的问题,设计了具有真空度反馈控制和定时启动功能的自动抽气系统。模拟计算了夹层外壁不同真空度下的冷量损失及温度分布变化规律,确定了系统工作的真空度阈值等参数。设计的抽气系统当前在束线液氮单色器上运转良好,有助于束线稳定运行。In view of the problems of condensation and dripping water and frost on the outside of the interlayer caused by decreasing vacuum degree for the vacuum interlayer of some beamline liquid nitrogen cooling monochromators,and the loss of cooling capacity of the liquid nitrogen pipeline in the Shanghai Synchrotron Radiation Facility,which threaten the operation safety.An automatic pumping system with vacuum feedback and timing start function is designed.Simulation and calculation of the cooling loss under different vacuum degrees of the interlayer help to determine the vacuum degree threshold and other parameters for the system to start.The as-designed pumping system currently works well on beamline liquid nitrogen cooling monochromators,helping to stabilize the beamline operation.

关 键 词：液氮单色器 运行安全 抽气系统设计 

分 类 号：TL503.7[核科学技术—核技术及应用] TB75[一般工业技术—真空技术]