Avalanche Photodiodes for Scintillating Fiber Detectors

9361738为满足高能物理实验对探测器的严格要求，提出了一种高速、高灵敏度的雪崩光电二极管阵列，如正在为现有和拟议的粒子物理探测器设计的中央跟踪器顶点探测器和热量计。这些探测器将具有前所未有的性能特征，用于读出闪烁塑料纤维中产生的极低光级，这些光级是由于带电粒子以非常高的循环率相互作用而产生的。所采取的方法将是修改现有的雪崩光电二极管设计，以产生一种暗电流更低、短波长下灵敏度更高、工作在单光子盖革模式下的周期更快的器件。考虑了雪崩二极管对主动猝灭电路的适应性。还将研究构建满足探测器比例模式操作需要的高增益器件，例如高动态范围量热测量所需的高增益器件。在这项工作中收集的数据将被用来生产具有所需特性组合的雪崩光电二极管阵列，以用于现代探测器设想的高速、微光应用，如费米拉实验室的D0和欧洲核子研究中心的L3。现代粒子物理设施将需要数百万个探测器。仅此一项就是一个巨大的市场。此外，这些改进的apd还将在工业应用中找到许多其他用途，如医学成像和研究应用。*诉S t$(F//1信使符号&amp；Arial 5 Courier New“h FB%FB%C R：\WW20USER\ABSTRACT.DOT Denise Henry Denise Henry

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