An active gain-control system for Avalanche photo-diodes under moderate temperature variations
An active gain-control system for Avalanche photo-diodes under moderate temperature variations
复制标题
DOI：
10.1016/j.nima.2006.03.033
复制
发表时间：
2006-08
影响因子：
1.4
通讯作者：
J. Kataoka;R. Sato;T. Ikagawa;J. Kotoku;Y. Kuramoto;Y. Tsubuku;T. Saito;Y. Yatsu;N. Kawai;Y. Ishikawa;N. Kawabata
中科院分区：
文献类型：
--
作者：
J. Kataoka;R. Sato;T. Ikagawa;J. Kotoku;Y. Kuramoto;Y. Tsubuku;T. Saito;Y. Yatsu;N. Kawai;Y. Ishikawa;N. Kawabata
雪崩光电二极管（APD）是一种有前途的光传感器，适用于实验物理的各个领域。然而，有人认为，APD 增益随温度的变化可能是阻碍 APD 在某些应用中取代传统光电倍增管 (PMT) 的严重问题。在这里，我们开发了一种主动增益控制系统，以在适度的温度变化下保持 APD 增益稳定。作为所提出系统的性能演示，我们测试了由与 CsI(Tl) 晶体光学耦合的 5×5mm2 反向 APD 组成的闪烁光子探测器的响应。我们表明，在 6000 秒的时间周期内，在 ΔT=20∘C 的温度变化下成功控制了 APD 增益。通过整合+20∘C–0∘C循环的数据，662keV γ射线的最佳半高宽能量分辨率为6.1±0.2%，能量阈值低至6.5keV。 -20°C–0°C 循环的相应值分别为 6.9±0.2% 和 5.2keV。这些结果与在固定温度下获得的结果具有可比性，或者仅稍差一些。我们的结果表明 APD 在各种空间研究和核物理中的新潜在用途。作为例子，我们简要介绍了 NeXT 和 Cute-1.7 卫星任务，它们将首次携带 APD 作为科学仪器。
Avalanche photodiodes (APDs) are a promising light sensor for various fields of experimental physics. It has been argued, however, that variation of APD gain with temperature could be a serious problem preventing APDs from replacing traditional photomultiplier tubes (PMTs) in some applications. Here we develop an active gain-control system to keep the APD gain stable under moderate temperature variations. As a performance demonstration of the proposed system, we have tested the response of a scintillation photon detector consisting of a 5×5mm2reverse-type APD optically coupled with a CsI(Tl) crystal. We show that the APD gain was successfully controlled under a temperature variation of ΔT=20∘C, within a time-cycle of 6000s. The best FWHM energy resolution of 6.1±0.2% was obtained for 662keV γ-rays, and the energy threshold was as low as 6.5keV, by integrating data from +20∘C–0∘C cycles. The corresponding values for -20∘C–0∘C cycles were 6.9±0.2% and 5.2keV, respectively. These results are comparable, or only slightly worse than that obtained at a fixed temperature. Our results suggest new potential uses for APDs in various space researches and nuclear physics. As examples, we briefly introduce the NeXT and Cute-1.7 satellite missions that will carry the APDs as scientific instruments for the first time.