High Power Laser and Particle Beams, Volume. 34, Issue 3, 031015(2022)

X-ray dual-spectrum imaging produced by femtosecond laser

Hongjian Wang1,4, Yan Ye2, Qingguo Yang2, Zeren Li2, and Hongjie Liu3
Author Affiliations
  • 1Chongqing Key Laboratory of Manufacturing Equipment Mechanism Design and Control, Chongqing Technology and Business University, Chongqing, 400067, China
  • 2Institute of Fluid Physics, CAEP, Mianyang 621900, China
  • 3Laser Fusion Research Center, CAEP, Mianyang 621900, China
  • 4Smart Manufacturing Institute of Robot and Laser,Chongqing Technology and Business University, Chongqing 400067, China
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    To obtain an X-ray source to diagnose micro-mesoscopic state of material with high brightness, good monochromaticity and good contrast in pump-probe technology, and to often ignore the bremsstrahlung line, hence we designed a dual-spectrum diagnostic X-ray source experiments using characteristic and bremsstrahlung spectra. The experiment was carried out on the femtosecond laser beam of the “Xingguang Ⅲ” laser facility of China Academy of Engineering Physics. The laser power density is more than 1.6×1018 W/cm2, with the pulse width of 30 fs by 45° to the target surface. On the other side of the target normal line, the pinhole imaging optical path for characteristic spectral imaging was designed to obtain the focal spot image of 76 μm from the characteristic X-ray generated by the Cu nanoparticle target, larger than the average focus spot of 54 μm obtained by the knife-edge method. On the back side of the Cu target, the bremsstrahlung imaging optical path was designed, and the PIX-ray CCD was used to obtain 2×5 circular Ta group images. Experiments show that the dual-spectral imaging design is reasonable, which is suitable for dynamic diagnosis of micro-mesoscopic materials, and improve diagnosis efficiency.

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    Hongjian Wang, Yan Ye, Qingguo Yang, Zeren Li, Hongjie Liu. X-ray dual-spectrum imaging produced by femtosecond laser[J]. High Power Laser and Particle Beams, 2022, 34(3): 031015

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    Paper Information

    Category: Laser Propagation and Control

    Received: Jul. 14, 2021

    Accepted: --

    Published Online: Mar. 28, 2022

    The Author Email:

    DOI:10.11884/HPLPB202234.210287

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