Introduction of Monoenergetic X-Ray Calibration Device and Test Items of NIM
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摘要: 介绍了中国计量院单能X射线实验室开展的单能X射线标定装置和探测器标定方法研究。已经建立的单能X射线标定装置能量范围可覆盖5~300 keV,为我国空间科学卫星的星载探测器提供了能量线性、探测效率、位置响应和角度响应等性能指标的地面标定。正在标定的卫星项目有:SVOM、GECAM和HXI等科学卫星的星载探测器。Abstract: This paper introduces the research on the monoenergetic X-ray calibration device and detector calibration method carried out by the Monoenergetic X-ray Laboratory of NIM. The energy range of the established monoenergetic X-ray calibration device can cover 5~300 keV, which provides the ground calibration of performance indicators such as energy linearity, detection efficiency, position response, and angular response for space-borne detectors of space science satellites in China. Satellite projects being calibrated include spaceborne detectors for scientific satellites such as SVOM, GECAM, and HXI.
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Key words:
- monoenergetic X-ray /
- Bragg diffraction /
- crystal monochromator /
- calibration
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表 1 两种晶体实验结果
Table 1. Experimental results of two kinds of crystals
晶体 Si220/220 kV Si551/600 kV 能量范围 (keV) 20.8~70.1 46.6~196.5 通量 (cm−2s−1) 15~7600 85~3000 光斑尺寸(mm) 2~10 2~10 表 2 三种晶体的实验结果
Table 2. Experimental results of three crystals
晶体 Si111 Si220 Si551 能量范围(keV) 23~102 21~104 34~301 布拉格角 (deg) 1.1~4.9 1.75~8.5 1.5~5 单色光通量 (cm−2s−1) 70~500 100~1366 300~1088 光斑尺寸(直径mm) 2~10 2~10 2~10 -
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