上海光源BL11B前端区真空系统设计

Vacuum System Design for BL11B Front End of SSRF

同步辐射光束线前端区真空系统的作用是将光束线站各设备的不同工作真空环境平稳过渡到储存环的超高真空状态,且可以在必要时通过真空联锁保护储存环真空不受破坏。本文从真空材料和获得、测量设备选择,系统气载分析,系统布局和压强分布计算,真空联锁保护,系统调试等几个方面介绍了硬X通用谱学光束线(BL11B)前端区真空系统的设计和调试方法。对该前端区无束流条件下的静态压强和经束流清洗后的动态压强分布进行了分析、模拟计算,并完成了真空系统的在线调试。调试结果显示,与储存环接口泵站处静态等效氮压强为1.5×10^(-8) Pa,动态等效氮压强为9×10^(-8) Pa,均满足甚至优于设计指标。证明此设计和调试方法在工程实施中是可靠的。

The front end vacuum system of the beamline in the synchrotron radiation facility can not only transfer the different working vacuum environment of each beamline equipment to the ultra-high vacuum state of the storage ring, but also protect the vacuum of the storage ring from damage when necessary through the vacuum interlock. This paper introduces the design and commissioning method of the front end vacuum system for the hard X ray spectroscopy beamline(BL11B), mainly extended from the aspects of vacuum material selection, equipment configuration, gas load analysis, system layout and pressure distribution calculation, vacuum interlock and the way for commissioning. The static and dynamic pressure distribution of the front end was simulated, and the pressure results of the pump station at the interface with the storage ring were 1.5×10^(-8) Pa(static) and 9×10^(-8) Pa(dynamic),both of which were equal or superior to the design indexes. It is proved that the method is reliable in the project implementation.