An ultrahigh-vacuum apparatus for resonant diffraction experiments using soft x rays (hnu=300-2000 eV).
An ultrahigh-vacuum apparatus for resonant diffraction experiments using soft x rays (hnu=300-2000 eV).
复制标题
使用软 X 射线（hnu=300-2000 eV）进行共振衍射实验的超高真空装置。
DOI：
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发表时间：
2009
影响因子：
1.6
通讯作者：
Shik Shin
中科院分区：
文献类型：
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作者：
T. Takeuchi;A. Chainani;Y. Takata;Yoshikazu Tanaka;M. Oura;M. Tsubota;Y. Senba;H. Ohashi;T. Mochiku;K. Hirata;Shik Shin
我们研制了一台超高真空仪器，用于在SPring-8的BL 17 SU光束线上进行能量范围为hnu=300-2000 eV的极化软X射线共振衍射实验。衍射仪由改进的差动泵旋转进给器组成，用于θ-2 θ级，样品操纵器具有电机控制的x-y-z轴，倾斜（chi）轴和方位角（phi）轴，以及液氦流动型低温恒温器，用于30和300 K之间的温度相关测量。测试结果表明，衍射仪对于α-石英100在hnu=1950 eV的光子能量下的布拉格反射表现出高再现性（好于0.001度）。典型的非共振和共振布拉格反射在530-1950 eV的能量范围内，可以使用该装置进行测量。结果表明，能量，方位角和入射光子偏振依赖性的x射线衍射实验可以可靠地测量使用软x射线在大约300-2000 eV的能量范围内。该装置可用于过渡金属的L边、镧系元素的M边以及材料的Si K边的共振衍射实验。
We have developed an ultrahigh-vacuum instrument for resonant diffraction experiments using polarized soft x rays in the energy range of hnu=300-2000 eV at beamline BL17SU of SPring-8. The diffractometer consists of modified differentially pumped rotary feedthroughs for theta-2theta stages, a sample manipulator with motor-controlled x-y-z-, tilt (chi)-, and azimuth (phi)-axes, and a liquid helium flow-type cryostat for temperature dependent measurements between 30 and 300 K. Test results indicate that the diffractometer exhibits high reproducibility (better than 0.001 degrees ) for a Bragg reflection of alpha-quartz 100 at a photon energy of hnu=1950 eV. Typical off- and on-resonance Bragg reflections in the energy range of 530-1950 eV could be measured using the apparatus. The results show that x-ray diffraction experiments with energy-, azimuth-, and incident photon polarization-dependence can be reliably measured using soft x rays in the energy range of approximately 300-2000 eV. The facility can be used for resonant diffraction experiments across the L-edge of transition metals, M-edge of lanthanides, and up to the Si K-edge of materials.