Characterization of the First FBK High-Density Cell Silicon Photomultiplier Technology
Characterization of the First FBK High-Density Cell Silicon Photomultiplier Technology
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DOI：
10.1109/ted.2013.2266797
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发表时间：
2013-08-01
影响因子：
3.1
通讯作者：
Zorzi, Nicola
中科院分区：
文献类型：
--
作者：
Piemonte, Claudio;Ferri, Alessandro;Zorzi, Nicola
在本文中，我们介绍了 FBK 生产的第一个高密度 (HD) 电池硅光电倍增管的表征结果。采用该技术制造的最先进原型的单元尺寸为 15 x 15 μ m(2)，标称填充系数为 48%。为了达到如此高的面积覆盖率，我们开发了一种新的边界结构来限制每个单光子雪崩二极管的高电场区域。测得的检测效率在光谱的绿色部分接近30%，在400至650 nm范围内超过20%。在这些效率值下，相关噪声非常低，过量电荷系数低于 1.1。我们将 2 x 2 x 10-mm(3) LYSO 闪烁体晶体与 2.2 x 2.2-mm(2) 硅光电倍增管耦合，在 PET 应用中获得了非常有前景的结果：半峰全宽 (FWHM) 的能量分辨率小于 11%，线性度损失可忽略不计，20 摄氏度时符合分辨时间为 200 ps FWHM。
In this paper, we present the results of the characterization of the first high-density (HD) cell silicon photomultipliers produced at FBK. The most advanced prototype manufactured with this technology has a cell size of 15 x 15 mu m(2) featuring a nominal fill factor of 48%. To reach this high area coverage, we developed a new border structure to confine the high electric-field region of each single-photon avalanche diode. The measured detection efficiency approaches 30% in the green part of the light spectrum and it is above 20% from 400 to 650 nm. At these efficiency values, the correlated noise is very low, giving an excess charge factor below 1.1. We coupled a 2 x 2 x 10-mm(3) LYSO scintillator crystal to a 2.2 x 2.2-mm(2) silicon photomultiplier, obtaining very promising results for PET application: energy resolution of less than 11% full-width at half maximum (FWHM) with negligible loss of linearity and coincidence resolving time of 200-ps FWHM at 20 degrees C.