First results of scintillator readout with silicon photomultiplier
First results of scintillator readout with silicon photomultiplier
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DOI：
10.1109/tns.2006.869848
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发表时间：
2006-02-01
影响因子：
1.8
通讯作者：
Golovin, A
中科院分区：
文献类型：
--
作者：
Herbert, DJ;Saveliev, V;Golovin, A
已经实现了一种新型的硅器件，其具有与传统PMT（光电倍增管）相当或更好的许多特性。本文介绍了使用这些光电探测器在可能的PET（正电子发射断层扫描）的应用程序中的曝光器的读出PMT的第一个结果。这种器件，硅光电倍增管（SiPM），是一个有效的雪崩光电二极管工作在盖革模式。在盖革模式探测器中，无论输入的大小如何，都会产生非常大的电流信号，仅提供逻辑信息而不是比例信息。然而，SiPM被细分为大量的（1440）A微单元，作为独立的和几乎相同的盖革模式光电二极管。所有这些单独的微单元的输出被连接，使得总输出信号是来自被激活的所有微单元的信号之和。通过这种方式，可以获得比例信息。由于它们的设计，这些检测器具有潜在的非常快的定时、在低偏置电压（类似于50 V）下的高增益（10（5）- 10（6））、高量子效率（在500 nm下为35%）、优异的单光电子分辨率并且制造便宜。在这里，我们提出了与脉冲LED和闪烁体像素使用时，这种新的光电探测器获得的结果。
A new type of silicon device has been realized that has many properties, comparable to, or better than, a conventional PMT (Photomultiplier Tube). This paper presents the first results of using these photodetectors in place of a PMT in the readout of scintillators for possible PET (Positron Emission Tomography) applications. This device, the Silicon Photomultiplier (SiPM), is effectively an avalanche photodiode operated in Geiger mode. In Geiger-mode detectors, a very large current signal is produced regardless of the size of the input, giving just logical rather than proportional information. However, the SiPM is subdivided into a large number (1440) A microcells that act as independent and virtually identical Geiger-mode photodiodes. The outputs of all these individual microcells are connected so that the total output signal is the sum of the signals from all of the microcells that were activated. In this way proportional information can be obtained. As a consequence of their design, these detectors have potentially very fast timing, high gain (10(5) - 10(6)) at low bias voltage (similar to 50 V), a high quantum efficiency (35% at 500 nm), excellent single photoelectron resolution and are cheap to manufacture. Here we present results obtained with this new photodetector when used with pulsed LED and scintillator pixels.