Recent progress of avalanche photodiodes in high-resolution X-rays and γ-rays detection
Recent progress of avalanche photodiodes in high-resolution X-rays and γ-rays detection
复制标题
DOI：
10.1016/j.nima.2005.01.081
复制
发表时间：
2005-04
影响因子：
1.4
通讯作者：
J. Kataoka;T. Saito;Y. Kuramoto;T. Ikagawa;Y. Yatsu;J. Kotoku;M. Arimoto;N. Kawai;Y. Ishikawa;N. Kawabata
中科院分区：
文献类型：
--
作者：
J. Kataoka;T. Saito;Y. Kuramoto;T. Ikagawa;Y. Yatsu;J. Kotoku;M. Arimoto;N. Kawai;Y. Ishikawa;N. Kawabata
本文研究了日本滨松光子学公司最近研制的大面积雪崩光电二极管（APD）在高分辨X射线和γ射线探测中的性能。我们表明，穿透APD可以是一个很好的软X射线探测器在室温或适度冷却的环境中工作。我们获得了迄今为止最好的APD能量分辨率，对5.9keV X射线的能量分辨率为6.4%，并获得了在-20 ℃下测量的低至0.5keV的能量阈值。由于其快速的定时响应，APD器件中的信号载波在1.9ns（FWHM）的短时间间隔内收集。因此，这种类型的APD可以用作即将到来的皮卫星Cute1.7上的低能量，高计数粒子监测器。作为闪烁光子探测器，反向型APD具有显著降低暗噪声的优点。用CsI（Tl）晶体测量，对59.5和662 keV γ射线的最佳半高宽能量分辨率分别为9.4±0.3%和4.9±0.2%。APD与各种其他闪烁器（BGO，GSO和雅普）的组合也显示出比用光电倍增管（PMT）获得的更好的结果。这些结果表明，APD可能是一个有前途的设备，在某些应用中取代传统的PMT的使用。特别是二维APD阵列，我们在本文中介绍，将是一个很有前途的设备，为宽带X射线和γ射线成像探测器在未来的空间研究和核医学。
We have studied the performance of large area avalanche photodiodes (APDs) recently developed by Hamamatsu Photonics K.K, in high-resolution X-rays and γ-rays detections. We show that reach-through APD can be an excellent soft X-ray detector operating at room temperature or moderately cooled environment. We obtain the best energy resolution ever achieved with APDs, 6.4% for 5.9keV X-rays, and obtain the energy threshold as low as 0.5keV measured at -20∘C. Thanks to its fast timing response, signal carriers in the APD device are collected within a short time interval of 1.9ns (FWHM). This type of APDs can therefore be used as a low-energy, high-counting particle monitor onboard the forthcoming Pico-satellite Cute1.7. As a scintillation photon detector, reverse-type APDs have a good advantage of reducing the dark noise significantly. The best FWHM energy resolutions of 9.4±0.3% and 4.9±0.2% were obtained for 59.5 and 662keV γ-rays, respectively, as measured with a CsI(Tl) crystal. Combination of APDs with various other scintillators (BGO, GSO, and YAP) also showed better results than that obtained with a photomultiplier tube (PMT). These results suggest that APD could be a promising device for replacing traditional PMT usage in some applications. In particular 2-dim APD array, which we present in this paper, will be a promising device for a wide-band X-ray and γ-ray imaging detector in future space research and nuclear medicine.