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Development of optical choppers for time-resolved measurements at soft X-ray synchrotron radiation beamlines

机译:开发用于软X射线同步加速器辐射束线时间分辨测量的光学斩波器

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摘要

Two types of optical choppers for time-resolved measurements at synchrotron radiation soft X-ray beamlines have been developed. One type uses an air-spindle-type rotation mechanism with a two-stage differential pumping system to maintain the ultra-high vacuum of the X-ray beamline, and the other uses a magnetic bearing. Both can be installed at the soft X-ray beamlines at SPring-8, greatly improving the accessibility of pump-and-probe spectroscopy. The combination of X-ray chopper and pump-and-probe photoemission electron microscope at SPring-8 provides drastic improvements in signal-to-noise ratio and resolution compared with techniques using high-voltage gating of channel plate detectors. The choppers have the capability to be used not only at synchrotron radiation facilities but also at other types of soft X-ray and VUV beamlines.
机译:已经开发出两种类型的光学斩波器,用于在同步加速器辐射软X射线束线上进行时间分辨测量。一种使用带有两级差动泵送系统的空气主轴型旋转机构来保持X射线束线的超高真空,另一种使用磁性轴承。两者都可以安装在SPring-8的软X射线光束线上,大大提高了泵浦和探针光谱的可及性。与使用通道板探测器高压选通的技术相比,在SPring-8上结合使用X射线斩波器和泵浦和探针光发射电子显微镜可以显着提高信噪比和分辨率。斩波器不仅可以用于同步加速器辐射设施,还可以用于其他类型的软X射线和VUV光束线。

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