【摘要】 我国第一台专用型的合肥国家同步辐射加速器Ｕ７Ｃ光束线上的Ｘ 射线吸收精细结构（ＸＡＦＳ） 实验站于１９９８ 年１２ 月完成建设和初步的调试工作．储存环电子能量为０－８ＧｅＶ，使用三极６Ｔ的超导Ｗｉｇｇｌｅｒ 磁铁插入件，可提供的最高能量约为１５０００ｅＶ的Ｘ射线．９０００ｅＶ 单色Ｘ 射线的强度约为３ ×１０９ 光子数／秒，能量分辨率为３ｅＶ 左右．探测系统为充连续流动的Ｎ２／Ａｒ 气体的电离室作探测器．在此条件下，采集了Ｃｕ，Ｎｉ，Ｆｅ 箔等标准样品的ＸＡＦＳ谱，获得很高的信噪比，Ｃｕ 箔的ＸＡＦＳ谱与北京和日本光子工厂的同步辐射加速器上的ＸＡＦＳ实验站测量的结果相一致，表明合肥国家同步辐射ＸＡＦＳ站已处于良好的工作状态，这将为我国ＸＡＦＳ用户提供高质量的同步辐射光源研究凝聚态物质的短程序结构．更多还原

【Abstract】 The installation of the XAFS station on the U7A beamline of Hefei National Synchrotron Radiation Laboratory was completed in December,1998.The electron beam energy is 0\^8 GeV and the maximum stored current 180 mA.A 3-pole wiggler with a maximum magnetic field of 6T inserted in the straight section of the storage ring is used.The maximum energy is limited to 15keV for XAFS measurement.The X\|ray intensity from an Si(111) double-crystal monochromator is about 3×10\+9 phs/sec.at an energy of 9keV,and the energy resolution is about 3eV.Data is collected with an ion chamber filled with Ar/N\-2 flowing at room temperature.A high signal ratio to noise can be obtained for the XAFS spectra of Cu,Ni and Fe foils.Furthermor,the Cu spectrum agrees well with those taken at BSRF and KEK,indicating that our XAFS station is operating well and will be useful for studying the local structure of condensed matter by synchrotron radiation.更多还原