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“嫦娥一号”卫星是我国的第一颗月球探测卫星,运行轨道高度为200km,预计工作寿命为一年,其上配备的X射线成像谱仪具备了对月表进行X射线探测、成像和对太阳X射线进行监测的功能。该X射线谱仪由两个全同的探测器阵列组成,其中,为了实现对月表主要化学元素分布及其含量进行探测的科学目标,在每个探测器阵列还配备了2个低能探测器单元。这4路低能探测器单元的面积为25mm2,采用的都是厚度为500μm,具有优良探测性能的Si-PIN探测器,其探测能区为1～10keV,能量分辨率为～5%@5.9keV。文章主要介绍了嫦娥一号卫星X射线谱仪的地面验证实验,并且根据X射线谱仪的能量响应矩阵,利用直接解调方法和基本参数法对X射线谱仪地面验证实验中的探测数据,特别是对盲测样品中的Mg,Al,Si等元素进行了定性和定量分析。
The Chang'e-1 satellite is the first lunar exploration satellite in China with an orbital altitude of 200 km and an expected working life of one year. The X-ray imaging spectrometer equipped with the X-ray imaging spectrometer has the ability to perform X- Imaging and monitoring of the sun's X-ray capabilities. The X-ray spectrometer consists of two identical detector arrays. In order to realize the scientific goal of detecting the distribution and content of major chemical elements on the lunar surface, each detector array is also equipped with two low-energy detectors unit. The 4-channel low-energy detector cell has an area of 25mm2 and uses a Si-PIN detector with a thickness of 500μm and excellent detection performance with a detection energy range of 1 ~ 10keV and an energy resolution of ~5% @ 5.9keV . The paper mainly introduces the ground verification experiment of Chang'e-1 satellite X-ray spectrometer. According to the energy response matrix of X-ray spectrometer and the direct demodulation method and basic parameter method, In particular, qualitative and quantitative analysis of elements such as Mg, Al, Si and the like in the blindly measured samples was carried out.