Abstract:

According to fluorescence response and scatter response function, the thicknesses of profilters, postfilters and fluorescers of the filter-fluorescer spectrometer have been optimized with data interpolation. The least signal-to-noise and the optimize thicknesses of prefilters, postfilters and fluorescers are obtained. The filter-fluorescer spectrometer apply the optimize thicknesses of prefilters, postfilters and fluorescers for decreasing influence of high-octane to the signal of detector and gaining more available spectrum of hard X-ray, sequentially calculating available information of suprathermal electron.

Key words: Filter fluorescer spectrometer, Response function, Optimize design, Suprathermal electron

摘要：

根据物质的吸收系数、散射截面、荧光截面的离散数据进行了二维插值，利用插值后的数据对前置滤片透射率、荧光体吸收截面、后置滤片透射率进行拟合，用文献[2]的滤波荧光谱仪的总响应函数(荧光响应函数和散射响应函数)以及探测器灵敏度和散射光、荧光光子数，对前置滤片、荧光片和后置滤片的不同厚度进行优化设计，得到了最大信噪比(荧光响应函数曲线的峰值面积与总响应函数面积的比值)及最大信噪比对应的前置滤片、荧光片、后置滤片厚度。在滤波荧光谱仪上应用优化厚度，减少了高能尾部对探测信号的影响，得到更加有效的硬X射线能谱，继而推算出更加精确超热电子信息。

关键词: 滤波荧光谱仪, 响应函数, 优化设计, 超热电子