The study was conducted to calibrate and characterise the response of the Timepix3 photon-counting hybrid pixel detector. The study was conducted to calibrate and characterise the response of the Timepix3 photon-counting hybrid pixel detector. The goal was also to determine the impact of the angular variation of the detector to the source, of temperature change, and of ambient or strobe light on the on the detector response (measured fluence and energy spectrum). The impacts were studied using X-ray fluorescence lines, as well as Am-241 and Fe-55 radioactive sources. Angular variation measurements indicated angular dependence. This dependency increased with the angle and increased with lower energies. A decrease in fluence of up to 98.4% was recorded for Fe-55 (5.89 keV) and 43.1% for Am-241 (59.56 keV) at an angle of 90°. Temperature measurements showed a 4% decrease of photon count when increasing the temperature from 10 °C to 36 °C. Energy spectra were shifted to lower energies when the temperature increased. Measurements with variable light intensities showed no variations in terms of fluence or energy spectra. However, if it was a strobe light, the fluence was overestimated by 10% and the spectral shape presented an additional artefactual peak around 3 keV. To restrict the variability of the detector response and avoid a time-consuming calculation of the error factor, due to the detector’s temperature variation, we showed that it is necessary to keep the measurement temperature as close as possible to the temperature at which the calibration was performed. We also discovered the necessity of focusing on other relevant parameters such as the effect of the ambient light level or the angle of incidence of the X-ray beam impinging the detector on the detector response. This enabled us to propose a set of correction factors that can be used for other applications.

进行这项研究是为了校准和表征Timepix3光子计数混合像素检测器的响应。进行这项研究是为了校准和表征Timepix3光子计数混合像素检测器的响应。目的还在于确定检测器角度变化对光源，温度变化以及环境光或频闪光的影响，对检测器响应（测量的注量和能谱）产生影响。使用X射线荧光线以及Am-241和Fe-55放射源研究了这些影响。角度变化测量表明角度依赖性。这种依赖性随角度而增加，而随较低的能量而增加。Fe-55（5.89 keV）的注量最多降低98.4％，而Am-241（59.56 keV）的注量降低90％，达到43.1％。温度测量显示，当温度从10°C升高到36°C时，光子数减少4％。当温度升高时，能谱转移到较低的能量。用可变的光强度进行的测量表明在注量或能谱方面没有变化。但是，如果是频闪灯，则通量被高估了10％，并且光谱形状在3 keV附近还出现了一个附加的伪像峰。为了限制检测器响应的可变性并避免由于检测器的温度变化而导致的耗时的误差因子计算，我们表明有必要使测量温度尽可能接近校准温度。执行。我们还发现有必要关注其他相关参数，例如环境光水平的影响或X射线束入射到检测器的入射角对检测器响应的影响。这使我们能够提出一套可用于其他应用的校正因子。