摘要
上海同步辐射装置(SSRF)为第三代同步辐射装置,其设计能量为3.5 GeV,最大流强为300 mA.SSRF中生物大分子光束线(U21)的前端区将接收总功率为4.36 kW、峰值功率密度高达44 kW/mrad2的光束.前端装置中的挡光器将阻挡全部的光束,所以挡光器的热-应力分析在前端区设计中是非常关键的.通过有限元方法,分析了挡光器在热交换系数为0.015 W/mm2、冷却水温度为30℃的工作条件下,挡光器的最高温度、最高冷却槽壁温以及最大热应力.分析结果得出挡光器的应力问题是挡光器设计的难点.为了减小挡光器工作时的热应力,对挡光器的结构进行了改进,并给出了其热-应力分析结果.
Shanghai Synchrotron Radiation Facility （SSRF） is an advanced third-generation facility. The designed energy is 3.5 GeV and the beam current is 300 mA. The front end of biomacromolecule crystallography beamline in SSRF can receive a total power of 4.36 kW and peak power density of 44 kW/mrad^2 . Since the photon shutter in the front end blocks all incident beam power, a thermal-stress analysis is vital in the design of the front end. The finite element method is used to analyze maximum temperature, maximum wall temperature of cooled hole and maximum stress of the pre-designed photon shutter. A heat transform coefficient of 0.015 W/mm^2 and bulk temperature 30 ℃ are used in the calculations. The study shows that the stress problem is critical in the photon shutter design, In order to reduce stress, configuration of the photon shutter is modified, The analysis results of the thermal-stress in the new configurations are presented.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期457-461,共5页
Journal of Shanghai University:Natural Science Edition
关键词
同步辐射
挡光器
高热载
有限元方法
热-应力分析
synchrotron radiation
photon shutter
high heat power
finite element analysis
thermal-stress analysis
