Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction

doi:10.1088/1674-1056/24/10/108701

中国物理B ›› 2015, Vol. 24 ›› Issue (10): 108701-108701.doi: 10.1088/1674-1056/24/10/108701

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction

郭鑫^{a b}, 江舟亚^{c d}, 陈龙^{c d}, 陈黎明^{b d}, 辛建国^a, Peter M. Rentzepis^e, 陈洁^{c d}

a School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China;
b Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
d IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China;
e Electrical & Computer Engineering, Texas A & M University, College Station, TX 77843, USA

收稿日期:2015-01-29 修回日期:2015-05-21 出版日期:2015-10-05 发布日期:2015-10-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61222509 and 11421064) and the W. M. Keck Foundation.

Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction

Guo Xin (郭鑫)^{a b}, Jiang Zhou-Ya (江舟亚)^{c d}, Chen Long (陈龙)^{c d}, Chen Li-Ming (陈黎明)^{b d}, Xin Jian-Guo (辛建国)^a, Peter M. Rentzepis^e, Chen Jie (陈洁)^{c d}

a School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China;
b Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
d IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China;
e Electrical & Computer Engineering, Texas A & M University, College Station, TX 77843, USA

Received:2015-01-29 Revised:2015-05-21 Online:2015-10-05 Published:2015-10-05
Contact: Chen Jie E-mail:jiec@sjtu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61222509 and 11421064) and the W. M. Keck Foundation.

摘要/Abstract

摘要： Ultrashort multi-keV x-ray pulses are generated by electron plasma produced by the irradiation of femtosecond pulses on metals. These sub-picosecond x-ray pulses have extended the field of x-ray spectroscopy into the femtosecond time domain. However, pulse-to-pulse instability and long data acquisition time restrict the application of ultrashort x-ray systems operating at low repetition rates. Here we report on the performance of a femtosecond laser plasma-induced hard x-ray source that operates at 1-kHz repetition rate, and provides a flux of 2.0×10¹⁰photons/s of Cu K_α radiation. Using this system for time-resolved x-ray diffraction experiments, we record in real time, the transient processes and structural changes induced by the interaction of 400-nm femtosecond pulse with the surface of a 200-nm thick Au (111) single crystal.

关键词: ultrafast x-ray diffraction, transient structures, lattice deformation

Abstract: Ultrashort multi-keV x-ray pulses are generated by electron plasma produced by the irradiation of femtosecond pulses on metals. These sub-picosecond x-ray pulses have extended the field of x-ray spectroscopy into the femtosecond time domain. However, pulse-to-pulse instability and long data acquisition time restrict the application of ultrashort x-ray systems operating at low repetition rates. Here we report on the performance of a femtosecond laser plasma-induced hard x-ray source that operates at 1-kHz repetition rate, and provides a flux of 2.0×10¹⁰photons/s of Cu K_α radiation. Using this system for time-resolved x-ray diffraction experiments, we record in real time, the transient processes and structural changes induced by the interaction of 400-nm femtosecond pulse with the surface of a 200-nm thick Au (111) single crystal.

Key words: ultrafast x-ray diffraction, transient structures, lattice deformation

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

87.15.ht

67.80.de (Structure, lattice dynamics and sound) 63.70.+h (Statistical mechanics of lattice vibrations and displacive phase transitions)

郭鑫, 江舟亚, 陈龙, 陈黎明, 辛建国, Peter M. Rentzepis, 陈洁. Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction[J]. 中国物理B, 2015, 24(10): 108701-108701.

Guo Xin (郭鑫), Jiang Zhou-Ya (江舟亚), Chen Long (陈龙), Chen Li-Ming (陈黎明), Xin Jian-Guo (辛建国), Peter M. Rentzepis, Chen Jie (陈洁). Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction[J]. Chin. Phys. B, 2015, 24(10): 108701-108701.

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Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction

Ultrafast structural dynamics studied by kilohertz time-resolved x-ray diffraction

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