AUTHOR=Tong Yajun , Fan Jiadong , Nie Yonggan , Guo Zhi , Gao Zichen , Yuan Xinye , He Bo , Chen Jiahua , Zhang Difei , Luan Hui , Zhang Jianhua , Lu Donghao , Xie Minghan , Cheng Peng , Feng Chao , Liu Tao , Deng Haixiao , Liu Bo , Liu Zhi , Jiang Huaidong 

TITLE=Kirkpatrick-Baez mirrors commissioning for coherent scattering and imaging endstation at SXFEL

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.977957

DOI=10.3389/fphy.2022.977957

ISSN=2296-424X

ABSTRACT=<p>Shanghai Soft X-ray Free-Electron Laser (SXFEL) is the first X-ray free-electron laser facility in China. The initial commissioning of the beamline was carried out in May 2021. Herein, we present a status report and the first experimental results obtained during the early commissioning of Kirkpatrick-Baez (KB) mirrors for the Coherent Scattering and Imaging (CSI) endstation, including three types of diagnostics. A bright X-ray focal spot of less than 3 μm was achieved by using edge-scan and silicon ablation imprint measurements. In order to confirm the spot size, the attenuated beam and full beam are used respectively for the two measurement methods.</p>