A high resolution and large solid angle x-ray Raman spectroscopy end-station at the Stanford Synchrotron Radiation Lightsource
A high resolution and large solid angle x-ray Raman spectroscopy end-station at the Stanford Synchrotron Radiation Lightsource
复制标题
DOI：
10.1063/1.4704458
复制
发表时间：
2012-04-01
影响因子：
1.6
通讯作者：
Bergmann, U.
中科院分区：
文献类型：
--
作者：
Sokaras, D.;Nordlund, D.;Bergmann, U.
我们介绍了最近在斯坦福同步辐射光源上开发、安装和运行的新的X射线拉曼光谱终端站。终端位于摆动光束线6-2，配备了两个单色器--Si(111)和Si(311)以及准直和聚焦光学元件。它由两个多晶体约翰型光谱仪组成，它们排列在直径1米的相交罗兰圆上。第一个位于前向散射角(Low-Q)，由直径为100 mm的40个球状弯曲和切块的Si(110)晶体组成，提供了约1.9%的4pi-Sr固体探测角。当与Si(311)单色器一起工作时，在6462.20 eV处获得了270meV的总能量分辨率。第二个光谱仪由14个球面弯曲的Si(110)晶体分析器(未切块)组成，位于后向散射角(高Q)，使研究非偶极跃迁成为可能。该光谱仪的立体角约为4pIsr的0.9%，用Si(311)单色仪测得的总能量分辨率为600 meV。这些功能超出了目前现有相关仪器的规格，为这种光子输入/光子输出硬X射线技术在能源相关科学、材料科学、物理化学等多学科科学领域的新兴研究中的常规应用开辟了新的机会。[http://dx.doi.org/10.1063/1.4704458]
We present a new x-ray Raman spectroscopy end-station recently developed, installed, and operated at the Stanford Synchrotron Radiation Lightsource. The end-station is located at wiggler beamline 6-2 equipped with two monochromators-Si(111) and Si(311) as well as collimating and focusing optics. It consists of two multi-crystal Johann type spectrometers arranged on intersecting Rowland circles of 1 m diameter. The first one, positioned at the forward scattering angles (low-q), consists of 40 spherically bent and diced Si(110) crystals with 100 mm diameters providing about 1.9% of 4 pi sr solid angle of detection. When operated in the (440) order in combination with the Si (311) monochromator, an overall energy resolution of 270 meV is obtained at 6462.20 eV. The second spectrometer, consisting of 14 spherically bent Si(110) crystal analyzers (not diced), is positioned at the backward scattering angles (high-q) enabling the study of non-dipole transitions. The solid angle of this spectrometer is about 0.9% of 4 pi sr, with a combined energy resolution of 600 meV using the Si (311) monochromator. These features exceed the specifications of currently existing relevant instrumentation, opening new opportunities for the routine application of this photon-in/photon-out hard x-ray technique to emerging research in multidisciplinary scientific fields, such as energy-related sciences, material sciences, physical chemistry, etc. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4704458]