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Chinese Journal of Space Science ›› 2019, Vol. 39 ›› Issue (1): 105-110.doi: 10.11728/cjss2019.01.105

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Highly Monochromatic Soft X-ray Beam Source Design

WEI Fei1,2,3, GUO Yihong1,2,3, LENG Shuang1,2,3,4, WEI Lai4, CAO Leifeng4   

  1. 1 National Space Science Center, Chinese Academy of Sciences, Beijing 100190;
    2 Beijing Key Laboratory of Space Environment Exploration, Beijing 100190;
    3 Key Laboratory of Environmental Space Situation Awareness Technology, Chinese Academy of Sciences, Beijing 100190;
    4 Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang 621900
  • Received:2017-08-25 Revised:2018-08-30 Online:2019-01-15 Published:2019-01-30

Abstract:

The soft X-ray radiation in the range from 100eV to 1keV consists of rich significant emission lines and the blackbody continuum. It is commonly used in X-ray instruments for space scientific missions, and the instruments should be well calibrated for spectral response before the flight. Because of the obvious spectra contamination from higher orders of diffraction, X-ray source used traditional gratings is difficult to get highly monochromatic X-ray beam. A new monochromator based on single-order diffraction grating is designed in patterns of zigzag or photon sieves, which has excellent diffraction characteristics of suppressing all higher orders of diffraction from shorter wavelength. The monochromator can keep the percent of the higher order contamination below 0.3%. The results can bring great advantages in preflight calibration of X-ray instruments for space science purposes.

Key words: Space environment, Soft X-ray, Higher order contamination, Single-order diffraction grating, Calibration

CLC Number: