Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (4): 66 doi: 10.1007/s41365-019-0578-2

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles     Next Articles

Generation of two-color polarization-adjustable radiation pulses for storage ring light source

Wei-Hang Liu1,2 • Yi Wu2 • Yi Jiao1 • Zheng-He Bai3 • Sheng Wang4   

  1. 1 Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
    4 China Spallation Neutron Source, Institute of High Energy Physics, Chinese Academy of Sciences, Dongguan 523803, China
  • Received:2018-08-08 Revised:2018-09-16 Accepted:2018-10-09
  • Contact: Yi Jiao E-mail:jiaoyi@ihep.ac.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 11475202, 11405187), Youth Innovation Association of Chinese Academy of Sciences, and Bureau of Frontier Sciences and Education, Chinese Academy of Sciences (No. QYZDJ-SSWSLH001), and National Key R&D Program of China (No. 2016YFA0401900).
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Wei-Hang Liu, Yi Wu, Yi Jiao, Zheng-He Bai, Sheng Wang. Generation of two-color polarization-adjustable radiation pulses for storage ring light source.Nuclear Science and Techniques, 2019, 30(4): 66     doi: 10.1007/s41365-019-0578-2

Abstract: To date, two-color pulses are widely used in pump–probe experiments. For a ring-based light source, the power of the spontaneous radiation fluctuates randomly in the longitudinal direction. It is difficult to produce twocolor double pulses by optical methods. In this paper, we introduce a method based on the echo-enabled harmonic generation scheme that generates two-color pulses in a storage ring light source. By adopting crossed undulators and a phase shifter, the polarization of the two-color pulses can be easily switched. A numerical simulation based on a diffraction-limited storage ring, the Hefei Advanced Light Source, suggests that the time delay and spectral separation of the two pulses can be adjusted linearly by changing the pulse duration and chirp parameters of the seed laser. A circular polarization degree above 80% could be achieved.

Key words: Two-color pulses, Echo-enabled harmonic generation, Diffraction-limited storage ring, Crossed undulators, Circular polarization