硬X射线探测器地面标定装置的研究

esearch of Hard X-ray Detector Ground Calibration Facility

20.8~301.9keV单能X射线的研究,为星载探测器的地面标定提供了基础保障,建立了2套硬X射线探测器地面标定装置。其中一套为双晶标定装置,配备管电压220kV与600kV的X射线光机,一套双晶单色器,单色器晶体采用Si(220)晶体与Si(551)晶体,通过调节布拉格衍射角可以分别实现20.8~70.1keV的单能X射线束流与46.6~196.5keV的单能X射线束流出光。另外一套为单晶标定装置,配备600kV的X射线光机与单晶单色器,采用Si(551)晶体可以实现33.6~301.9keV的单能X射线。两套硬X射线探测器地面标定装置共同实现了20.8~301.9keV的单能X射线。双晶标定装置能量分辨率1.80%@23.2keV、1.19%@70.1keV;单晶标定装置能量分辨率1.53%@92.6keV、5.55%@301.9keV,可以满足引力波电磁对应体全天候监视器、空间多波基天文变源监测卫星以及先进天机太阳天文台卫星的地面标定的需求。

The research of 20.8~301.9 keV monochromatic X-rays provides basic guarantee for ground calibration of space-borne detectors. Two sets of hard X-ray detector ground calibration facilities were established. One of them is a double-crystal calibration facility equipped with X-ray tubes with tube voltages of 220 kV and 600 kV, a set of double-crystal monochromator. And monochromator crystal adopts Si(220) crystal and Si(551) crystal, by means of adjusting Bragg diffraction angles can achieve monochromatic X-rays beam of (20.8~70.1) keV and monochromatic X-rays beam of (46.6~196.5) keV respectively. The other set is a single crystal calibration facility equipped with a 600kV X-ray tube and a single crystal monochromator. Using Si(551) crystal can realize monochromatic X-rays of (33.6~301.9) keV. Two sets of hard X-ray detector ground calibration facilities realized monochromatic X-rays of (20.8~301.9) keV together.The energy resolution of the double crystal calibration facility is 1.80%@23.2 keV, 1.19%@70.1 keV;the energy resolution of the single crystal calibration facility is 1.53%@92.6 keV, 5.55%@301.9 keV, it can meet the calibration requirement of Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor, Space Variable Objects Monitor and Advanced Space-based Solar Observatory.