中国物理B ›› 2021, Vol. 30 ›› Issue (9): 98701-098701.doi: 10.1088/1674-1056/ac0baf

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Ultrafast structural dynamics using time-resolved x-ray diffraction driven by relativistic laser pulses

Chang-Qing Zhu(朱常青)1,2, Jun-Hao Tan(谭军豪)1,2, Yu-Hang He(何雨航)1, Jin-Guang Wang(王进光)1, Yi-Fei Li(李毅飞)1, Xin Lu(鲁欣)1,2,3, Ying-Jun Li(李英骏)4,5, Jie Chen(陈洁)6, Li-Ming Chen(陈黎明)6,†, and Jie Zhang(张杰)1,6   

  1. 1 Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    4 State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China;
    5 Department of Physics, College of Science, China University of Mining and Technology, Beijing 100083, China;
    6 IFSA Collaborative Innovation Center and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 收稿日期:2021-04-01 修回日期:2021-05-24 接受日期:2021-06-16 出版日期:2021-08-19 发布日期:2021-08-30
  • 通讯作者: Li-Ming Chen E-mail:lmchen@sjtu.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2017YFA0403301), Science Challenge Project (Grant No. TZ2018005), the National Natural Science Foundation of China (Grant Nos. 11991073, 11721404, 11805266, 11905289, and 61975229), and Key Program of Chinese Academy of Sciences (Grant Nos. XDA25030400 and XDB17030500).

Ultrafast structural dynamics using time-resolved x-ray diffraction driven by relativistic laser pulses

Chang-Qing Zhu(朱常青)1,2, Jun-Hao Tan(谭军豪)1,2, Yu-Hang He(何雨航)1, Jin-Guang Wang(王进光)1, Yi-Fei Li(李毅飞)1, Xin Lu(鲁欣)1,2,3, Ying-Jun Li(李英骏)4,5, Jie Chen(陈洁)6, Li-Ming Chen(陈黎明)6,†, and Jie Zhang(张杰)1,6   

  1. 1 Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    4 State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China;
    5 Department of Physics, College of Science, China University of Mining and Technology, Beijing 100083, China;
    6 IFSA Collaborative Innovation Center and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2021-04-01 Revised:2021-05-24 Accepted:2021-06-16 Online:2021-08-19 Published:2021-08-30
  • Contact: Li-Ming Chen E-mail:lmchen@sjtu.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2017YFA0403301), Science Challenge Project (Grant No. TZ2018005), the National Natural Science Foundation of China (Grant Nos. 11991073, 11721404, 11805266, 11905289, and 61975229), and Key Program of Chinese Academy of Sciences (Grant Nos. XDA25030400 and XDB17030500).

摘要: Based on a femtosecond laser plasma-induced hard x-ray source with a high laser pulse energy (>100 mJ) at 10 Hz repetition rate, we present a time-resolved x-ray diffraction system on an ultrafast time scale. The laser intensity is at relativistic regime (2×1019 W/cm2), which is essential for effectively generating Kα source in high-Z metal material. The produced copper Kα radiation yield reaches to 2.5×108 photons/sr/shot. The multilayer mirrors are optimized for monochromatizating and two-dimensional beam shaping of Kα emission. Our experiment exhibits its ability of monitoring the transient structural changes in a thin film SrCoO2.5 crystal. It is demonstrated that this facility is a powerful tool to perform dynamic studies on samples and adaptable to the specific needs for different particular applications with high flexibility.

关键词: ultrafast x-ray diffraction, transient structural changes, multilayer mirrors

Abstract: Based on a femtosecond laser plasma-induced hard x-ray source with a high laser pulse energy (>100 mJ) at 10 Hz repetition rate, we present a time-resolved x-ray diffraction system on an ultrafast time scale. The laser intensity is at relativistic regime (2×1019 W/cm2), which is essential for effectively generating Kα source in high-Z metal material. The produced copper Kα radiation yield reaches to 2.5×108 photons/sr/shot. The multilayer mirrors are optimized for monochromatizating and two-dimensional beam shaping of Kα emission. Our experiment exhibits its ability of monitoring the transient structural changes in a thin film SrCoO2.5 crystal. It is demonstrated that this facility is a powerful tool to perform dynamic studies on samples and adaptable to the specific needs for different particular applications with high flexibility.

Key words: ultrafast x-ray diffraction, transient structural changes, multilayer mirrors

中图分类号:  (Ultrafast dynamics; charge transfer)

  • 87.15.ht
67.80.de (Structure, lattice dynamics and sound) 07.85.-m (X- and γ-ray instruments)