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首页> 外文期刊>Journal of synchrotron radiation >Focusing X-ray free-electron laser pulses using Kirkpatrick-Baez mirrors at the NCI hutch of the PAL-XFEL
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Focusing X-ray free-electron laser pulses using Kirkpatrick-Baez mirrors at the NCI hutch of the PAL-XFEL

机译：使用Kirkpatrick-Baez镜子在Pal-XFEL的NCI Huck镜子上聚焦X射线自由电子激光脉冲

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摘要

The Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL) is a recently commissioned X-ray free-electron laser (XFEL) facility that provides intense ultrashort X-ray pulses based on the self-amplified spontaneous emission process. The nano-crystallography and coherent imaging (NCI) hutch with forward-scattering geometry is located at the hard X-ray beamline of the PAL-XFEL and provides opportunities to perform serial femtosecond crystallography and coherent X-ray diffraction imaging. To produce intense highdensity XFEL pulses at the interaction positions between the X-rays and various samples, a microfocusing Kirkpatrick-Baez (KB) mirror system that includes an ultra-precision manipulator has been developed. In this paper, the design of a KB mirror system that focuses the hard XFEL beam onto a fixed sample point of the NCI hutch, which is positioned along the hard XFEL beamline, is described. The focusing system produces a two-dimensional focusing beam at approximately 2 μm scale across the 2-11 keV photon energy range. XFEL pulses of 9.7 keVenergy were successfully focused onto an area of size 1.94 μm × 2.08 μm FWHM.
机译：Pohang Accelerator实验室X射线自由电子激光器（PAL-XFEL）是最近委托的X射线自由电子激光器（XFEL）设施，基于自增强的自发排放过程提供强烈的超短X射线脉冲。具有前进散射几何形状的纳米晶体和相干成像（NCI）Hutch位于PAL-XFEL的硬X射线束线上，并提供了执行串行飞秒晶体学和相干X射线衍射成像的机会。为了在X射线和各种样品之间的相互作用位置产生强度XFEL脉冲，已经开发了包括超精密机械手的微胶质锁定kirkpatrick-baez（kb）镜面系统。在本文中，描述了将硬XFEL光束聚焦到NCI Hutch的固定采样点的KB镜像系统的设计。聚焦系统在2-11keV光子能量范围内产生大约2μm刻度的二维聚焦光束。 9.7的XFEL脉冲9.7的护肤成功集中在1.94μm×2.08μmfwhm的面积上。

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