Hawthorn D G, He F, Venema L, Davis H, Achkar A J, Zhang J, Sutarto R, Wadati H, Radi A, Wilson T, Wright G, Shen K M, Geck J, Zhang H, Novák V, Sawatzky G A
Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
Rev Sci Instrum. 2011 Jul;82(7):073104. doi: 10.1063/1.3607438.
We describe the design, construction, and performance of a 4-circle in-vacuum diffractometer for resonant elastic soft x-ray scattering. The diffractometer, installed on the resonant elastic and inelastic x-ray scattering beamline at the Canadian Light Source, includes 9 in-vacuum motions driven by in-vacuum stepper motors and operates in ultra-high vacuum at base pressure of 2 × 10(-10) Torr. Cooling to a base temperature of 18 K is provided with a closed-cycle cryostat. The diffractometer includes a choice of 3 photon detectors: a photodiode, a channeltron, and a 2D sensitive channelplate detector. Along with variable slit and filter options, these detectors are suitable for studying a wide range of phenomena having both weak and strong diffraction signals. Example measurements of diffraction and reflectivity in Nd-doped (La,Sr)(2)CuO(4) and thin film (Ga,Mn)As are shown.
我们描述了一种用于共振弹性软X射线散射的四圆真空衍射仪的设计、构造和性能。该衍射仪安装在加拿大光源的共振弹性和非弹性X射线散射束线上，包括9个由真空步进电机驱动的真空运动，并在2×10(-10)托的基础压力下的超高真空环境中运行。通过一个闭环低温恒温器将其冷却至18K的基础温度。该衍射仪包括3种光子探测器供选择：一个光电二极管、一个通道电子倍增器和一个二维灵敏通道板探测器。连同可变狭缝和滤光片选项，这些探测器适用于研究具有弱和强衍射信号的广泛现象。文中展示了在掺钕的(La,Sr)(2)CuO(4)和薄膜(Ga,Mn)As中进行衍射和反射率测量的示例。
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