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SSRF XAFS光束线初步设计
引用本文:侯铮迟.SSRF XAFS光束线初步设计[J].中国科学技术大学学报,2001,31(3):315-321.
作者姓名:侯铮迟
作者单位:上海同步辐射中心(筹
摘    要:对上海同步辐射装置(SSRF)的一条用于XAFS研究的光束线的初步设计进行了介绍.该设计以弯铁辐射作为光源,光束线光学系统采用聚焦和不聚焦两种光学模式.用追迹程序Shadow对光束线性能进行模拟计算,聚焦模式在5~25keV的能量范围内样品位置的光斑尺寸为0.5×0.5mm2,光强高于1011photons/s,高次谐波成分小于10-4,适合于用荧光XAFS方法研究低浓度及表面样品体系;不聚焦模式可用的能量范围较宽(4~40keV),样品位置的光斑尺寸小于50×2mm2,光强高于109photons/s,高次谐波成分小于10-2,适用于常规XAFS方法的研究.

关 键 词:SSRF  XAFS  光束线设计
文章编号:0253-2778(2001)03-0315-07
修稿时间:2000年11月2日

Preliminary SSRF XAFS Beamline Design
HOU Zheng chi.Preliminary SSRF XAFS Beamline Design[J].Journal of University of Science and Technology of China,2001,31(3):315-321.
Authors:HOU Zheng chi
Abstract:This paper is a preliminary design for an XAFS beamline at theSSRF. In this design, the bending magnet-based radiation is used as the light source. The beamline designed has two optical modes, focused and unfocused. The performance data of the beamline are modeled by the ray-tracing code SHADOW. For focused mode which is often applied in fluorescence XAFS for dilute and surface samples, the energy range is 5~25 keV, the beam size at the sample position 0.5×0.5 mm2, the flux more than 1011 photons/sec and the content of higher order harmonics less than 10-4. For unfocused mode which is mainly used to the standard XAFS, the energy range is 4~40 keV, the beam size at the sample position less than 50×2 mm2, the flux more than 109 photons/sec and the content of higher order harmonics less than 10-2.
Keywords:SSRF  XAFS  beamline design
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