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《Science China(Physics,Mechanics & Astronomy)》 2019年12期
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Accurate reconstruction of soft X-ray energy spectrum in detector response matrix

RunLong Gao  Yang Liu  XiaoPing Ouyang  Jing Chen  Xiao Ouyang  
【摘要】:In this paper, we report the design of a Monte Carlo simulation for the energy spectrum measurement system based on the ladderabsorption method. Herein, the detector response matrix can be calculated using the detector responses to several monochromatic X-ray beams. A novel soft X-ray spectrum unfolding method based on the two-step reverse iteration(TSRI) algorithm is applied to acquire the primary spectrum. This paper provides examples of the use of TSRI, and the unfolded energy spectra for the soft Xray beams show excellent agreement with the references. The unfolded energy spectra obtained using the TSRI exhibit better accuracy than those obtained from the commonly used unfolding code GRAVEL.

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