Performance of the undulator based ultraviolet and soft x-ray beamline for catalysis and surface science at National Synchrotron Radiation Laboratory

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• 作者：Liangliang Du^a ; ^b ; Xuewei Du^b ; ^{xwdu@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Shen Wei^b ; Chaoyang Li^c ; Congyuan Pan^b ; Huanxin Ju^b ; Qiuping Wang^b ; ^{qiuping@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Junfa Zhu^b
• 关键词：Beamline ; Varied-line-spacing plane grating monochromator ; Catalysis and surface science ; Ultraviolet and soft x-ray
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：1 December 2016
• 年：2016
• 卷：838
• 期：Complete
• 页码：62-65
• 全文大小：1323 K

文摘

The undulator based ultraviolet and soft x-ray beamline BL11U for catalysis and surface science at National Synchrotron Radiation Laboratory (NSRL) has been under opteration for months and the present performance is described. This beamline utilizes radiation from an in-vacuum undulator, which has 30 magnetic periods with the period length of 40 mm. A varied-line-spacing plane grating monochromator is employed tto cover the photon energy region of 20–600 eV by two gratings with nominal groove densities of 400 llmm and 1200 l/mm respectively. The energy resolution power E/ΔE is measured with a gas ionization chamber and the photon flux is measured by a photodiode. Results show that the resolution power is better than 10,000 at a photon energy of 29.2 eV. And the flux is higher than 1×10¹⁰ phs/s under 300 mA ring beam current for most of the covered photon energy.