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Patterned anodes with sub-millimeter spatial resolution for large-area MCP-based photodetector systems
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ( IF 1.5 ) Pub Date : 2020-09-28 , DOI: 10.1016/j.nima.2020.164702
Jinseo Park , Fangjian Wu , Evan Angelico , Henry J. Frisch , Eric Spieglan

Micro-channel-plate-based photo-detectors are unique in being capable of covering very large areas such as those required in elementary particle and nuclear physics, while providing sub-millimeter space resolution, time resolutions of less than 10 picoseconds for charged particles, and time resolutions of 30 psec–50 psec for single photons. In such systems the electronic channel count is a major cost driver. Incorporating a capacitively-coupled anode allows the use of external pickup electrodes with patterns of individual channels optimized for occupancy, rate, and time/space resolution. The signal pickup antenna can be economically implemented as a printed circuit card with a 2-dimensional array of pads for high-occupancy/high-rate applications such as in particle colliders and medical imaging, or a 1-dimensional array of strips for a lower channel count in low-occupancy/low-rate applications such as large neutrino detectors. Here we present pad patterns that enhance signal-sharing between pads to lower the channel count per unit area in large-area systems by factors up to 4, while maintaining spatial resolutions of approximately 100 to 200μm for charged particles and 400 to 1000μm for single photons. Patterns that use multiple signal layers in the signal-pickup board can lower the channel count even further, moving the scaling behavior in the number of pads versus total area from quadratic to linear.



中文翻译:

大面积基于MCP的光电探测器系统具有亚毫米空间分辨率的图案化阳极

基于微通道板的光电探测器的独特之处在于能够覆盖非常大的区域,例如基本粒子和核物理学所需的区域,同时提供亚毫米级的空间分辨率,带电粒子的时间分辨率小于10皮秒,单光子的时间分辨率为30 ps–50 ps。在这样的系统中,电子渠道数量是主要的成本驱动因素。结合电容耦合阳极可以使用外部拾波器电极,其单个通道的图形针对占用率,速率和时间/空间分辨率进行了优化。信号接收天线可以经济地实现为带有二维阵列焊盘的印刷电路卡,用于诸如粒子对撞机和医学成像等高占用/高速率应用,或在低占用率/低速率应用(例如大型中微子探测器)中使用的一维条带阵列,以减少通道数。在这里,我们介绍了增强焊盘之间信号共享的焊盘模式,以将大面积系统中每单位面积的通道数降低多达4倍,同时保持大约100至100的空间分辨率。200μ 用于带电粒子和400至 1000μ对于单光子。在信号拾取板中使用多个信号层的图形可以进一步降低通道数,从而将焊盘数量与总面积的缩放比例行为从二次变为线性。

更新日期:2020-10-05
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