Development And Testing Of A Prototype Mosaic Wedge-And-Strip Anode Detector
Development And Testing Of A Prototype Mosaic Wedge-And-Strip Anode Detector
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DOI：
10.1117/12.962609
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
A. Rasmussen;C. Martin
中科院分区：
文献类型：
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作者：
A. Rasmussen;C. Martin
我们描述了一个原型镶嵌楔形和条形阳极的初步实验室研究，这是一种新型的读出系统，将提供大格式，高分辨率微通道板探测器与相对简单的读出电子设备。本研究的目的是证明镶嵌阳极算法的线性，并验证在实际探测器配置中的预测分辨率性能。我们发现在两个阳极之间的边界处引入的非线性被限制在50-100 pm。我们还发现，在增益为2 × 107的情况下，探测器的空间分辨率主要受分割噪声限制在~ 35 μm （FWHM）。我们也开始系统地研究到达阳极的电荷分布。利用到达我们马赛克图案的两个阳极上的相对电荷，我们确定了分布的详细形状及其对MCP-阳极电压，MCP电压和脉冲高度的依赖。我们发现剖面对脉冲高度有显著的依赖性，这可以引入脉冲高度对质心计算的依赖性，特别是在阳极边缘附近。我们讨论了改进的阳极设计，以达到最佳的性能。
We describe a preliminary laboratory study of a prototype mosaic wedge-and-strip anode, a new class of readout system that will furnish large format, high resolution microchannel plate detectors with comparatively simple readout electronics. The goals of this study were to demonstrate the linearity of the mosaic anode algorithm, and to verify the predicted resolution performance in a realistic detector configuration. We find that the nonlinearity introduced at the boundary between two anodes is limited to 50-100 pm. We also show that the spatial resolution of the detector is limited mainly by partition noise to ~ 35 μm (FWHM) at a gain of 2 x 107. We have also begun a systematic investigation of the charge distribution arriving at the anode. Using the relative charges arriving on the two anodes of our mosaic pattern, we have determined the detailed shape of the distribution and its dependence on MCP-anode voltage, MCP voltage, and pulse height. We find a significant dependence of the profile on pulse height, which can introduce a pulse height dependence to the centroid calculation, particularly near the anode edges. We discuss improved anode designs which will achieve the optimal performance.