Characterization of room temperature AlGaAs soft X-ray mesa photodiodes
Characterization of room temperature AlGaAs soft X-ray mesa photodiodes
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DOI：
10.1016/j.nima.2014.11.039
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发表时间：
2015-02-21
影响因子：
1.4
通讯作者：
Ng, J. S.
中科院分区：
文献类型：
--
作者：
Barnett, A. M.;Lioliou, G.;Ng, J. S.
给出了一组9个原型Al_（0.8）Ga_（0.2）As p（+）-i-n（+）梅萨光电二极管（直径400 μ m，层厚1.7 μ m）的测试结果。结果表明，作为室温光谱光子计数软X射线探测器的设备的性能。使用低噪声电荷灵敏度计测量光电二极管对Fe-55放射性同位素X射线源的照射的响应;用设备测量的能量分辨率彼此一致，并且在5.9 keV处的平均FWHM为1.27 keV。这些器件是迄今为止文献中报道的最厚（检测效率最高）的AlGaAs X射线光谱梅萨光电二极管。它们的能量分辨率也比以前报道的所有相同面积的非雪崩AlGaAs X射线探测器更好（C）2014 Elsevier B. V.保留所有权利。
Results characterising a set of nine prototype Al0.8Ga0.2As p(+)-i-n(+) mesa photodiodes (400 mu m diameter, 1.7 mu m i layer) are presented. The results show the performance of the devices as room temperature spectroscopic photon counting soft X-ray detectors. The responses of the photodiocles to illumination with an Fe-55 radioisotope X-ray source were measured using a low noise charge sensitive preamplifier; the energy resolutions measured with the devices were consistent with each other and had a mean FWHM at 5.9 keV of 1.27 keV. The devices are the thickest (highest detection efficiency) AlGaAs X-ray spectroscopic mesa photodiodes reported in the literature to date. They also have better energy resolution than all previously reported non-avalanche AlGaAs X-ray detectors of the same area (C) 2014 Elsevier B.V. All rights reserved.