Avalanche Photodiodes for Scintillating Fiber Detectors

9361738 Entine为了满足高能物理实验中对中央跟踪顶点探测器和量热计等探测器的严格要求，提出了一种高速、高灵敏度的雪崩光电二极管（ADP）阵列。这些探测器将具有前所未有的性能特征，可用于闪烁塑料纤维中产生的非常低的光水平的读数，这是由于带电粒子在非常高的回收率下相互作用造成的。采用的方法是修改现有的APD设计，使其具有更低的暗电流，更高的短波灵敏度，以及在单光子盖革模式下工作时更快的周期时间。考虑了APD对主动淬火电路的适应性。构建高增益器件，以满足探测器对比例模式操作的需求，如高动态范围量热测量所需的高增益器件也将被研究。在这项工作中收集的数据将用于生产APD阵列，该阵列具有所需的特性组合，可用于现代探测器（如费米实验室的D0和欧洲粒子物理研究所的L3）的高速、低光应用。现代粒子物理设施将需要数百万个探测器。这是一个巨大的市场。此外，这些改进的APD将在工业应用中找到许多其他用途，例如医学成像和研究应用。*** *** *是t​$ $ $ (F / / 1快递符号&amp； Arial 5 Courier New " h fB %fB % CR: \ WW20USER \抽象。DOT丹尼斯·亨利丹尼斯·亨利

9361738 Entine A high speed, high sensitivity avalanche photodiode (ADP) array is proposed to meet the stringent requirements of detectors for high energy physics experiments such as the central tracker vertex detector and calorimeters which are being designed for existing and proposed particle physics detectors. These detectors will have unprecedented performance characteristics to be used as readouts for the very low light levels produced in scintillating plastic fibers which result from charged particle interactions at very high recycle rates. The approach taken will be to modify existing APD designs to yield a device with lower dark current, increased sensitivity at short wavelengths, and faster cycle times when operated in the single photon Geiger mode. Consideration was given to adaptability of the APD to active quenching circuitry. Constructing high gain devices that fulfill detector needs for proportional mode operation such as those required for high dynamic range calorimetry measurements will also be investigated. The data gathered during this work will be used to produce an APD array with the required combination of characteristics to be used in high speed, low light level applications envisioned at modern detectors such as the D0 at Fermilab and L3 at CERN. Millions of detectors will be needed for modern particle physics facilities. This alone is a large market. Also, these improved APD's will find numerous other uses in industrial applications, such as medical imaging, and research applications. *** v s t $ $ $ ( F / / 1 Courier Symbol & Arial 5 Courier New " h fB %fB % C R:\WW20USER\ABSTRACT.DOT Denise Henry Denise Henry