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一、引言正在建造中的合肥同步辐射加速器是一台真空紫外和软X光的专用光源。它同时可供20多条光束线和几十个实验站使用。加速器贮存环贮存电子束流时,环内真空度为2×10~(-9)Torr,并且不允许质量数大于44的碳氢化合物分压超过一定值。光束线的镜箱
I. INTRODUCTION The Hefei Synchrotron Radiation Accelerator under construction is a special light source for vacuum ultraviolet and soft X-ray. It is also available for more than 20 beam lines and dozens of experimental stations. When the accelerator storage ring stores the electron beam, the degree of vacuum in the ring is 2 × 10 -9 Torr, and does not allow the partial pressure of hydrocarbons having a mass number greater than 44 to exceed a certain value. Beam line of the mirror box