High Power Laser and Particle Beams, Volume. 32, Issue 5, 054002(2020)

Generation of sub-mm focal spot for intense-current accelerator utilizing spatial collimating restriction

Yi Wang, Jin Li, Qin Li, and Zhiyong Dai
Author Affiliations
  • Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, Mianyang 621900, China
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    Figures & Tables(13)
    Schematic of X-ray collimating
    Spatial distribution of source spot without collimating structure
    Spatial distribution of source spot with the 1st collimating structure
    Spatial distribution of source spot with the 2nd collimating structure
    MTF curves of the source spot
    Angular distribution of the light source radiation without collimating structure
    Angular distribution of the light source radiation with the 1st collimating structure
    Angular distribution of the light source radiation with the 2nd collimating structure
    Photon spectra at straight forward direction without collimating structure
    Photon spectra at straight forward direction with the 1st collimating structure
    Photon spectra at straight forward direction with the 2nd collimating structure
    • Table 1. Comparison of light source spot size between imaging processes with and without collimating structures

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      Table 1. Comparison of light source spot size between imaging processes with and without collimating structures

      collimating structureFWHM of electron beam /mmFWHM of light source/mmf50%MTF/mm-1D50%MTF/mm D50%MTF /FWHM
      without collimating structure1.501.520.302.391.56
      2.001.980.223.181.61
      3.003.050.164.451.45
      the 1st collimating structure1.500.660.641.101.50
      2.000.680.591.191.60
      3.000.710.561.271.66
      the 2nd collimating structure1.500.850.581.211.34
      2.000.890.541.301.35
      3.000.920.501.411.47
    • Table 2. Comparison of light source radiation between imaging processes with and without collimating structures

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      View in Article

      Table 2. Comparison of light source radiation between imaging processes with and without collimating structures

      collimating structure FWHM of electron beam /mm maximum of exposure/ (10−13R/electron) emitting angle at half maximum of exposure /(°) photon number flux / (10−4cm−2·electron−1average photon energy /MeV
      without collimating structure1.506.316.556.333.06
      2.006.925.816.903.08
      3.007.565.177.523.09
      the 1st collimating structure1.501.481.211.283.61
      2.001.021.240.873.65
      3.000.551.280.463.69
      the 2nd collimating structure1.502.021.261.803.46
      2.001.421.291.253.52
      3.000.771.320.673.57
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    Yi Wang, Jin Li, Qin Li, Zhiyong Dai. Generation of sub-mm focal spot for intense-current accelerator utilizing spatial collimating restriction[J]. High Power Laser and Particle Beams, 2020, 32(5): 054002

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    Paper Information

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    Received: May. 15, 2019

    Accepted: --

    Published Online: Apr. 24, 2020

    The Author Email:

    DOI:10.11884/HPLPB202032.190166

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