一种基于MAPS的数字ECAL
A digital ECAL based on MAPS
摘要：
报道了用于ILC的硅钨ECAL的单片有源像素传感器（MAPS）的开发和测试进展。使用激光和源设置，传感器的第一个版本已经通过测量的绝对增益校准，噪声和基座的特点。像素到像素的增益扩展为10%。已测量电荷扩散，并发现与模拟结果兼容。单个像素收集的电荷从50%到20%不等，这取决于它产生的位置。在将探测器效应添加到类似ILC的ECAL的Geant 4模拟中之后，使用测量的参数，发现能量分辨率比理想分辨率高35%，但仍然低于等效模拟ECAL获得的分辨率。
英文摘要：
Progress is reported on the development and testing of Monolithic Active Pixel Sensors (MAPS) for a Si-W ECAL for the ILC. Using laser and source setups, a first version of the sensor has been characterised through measurements of the absolute gain calibration, noise and pedestal. The pixel-to-pixel gain spread is 10%. Charge diffusion has been measured and found to be compatible with simulation results. The charge collected by a single pixel varies from 50% to 20% depending on where it is generated. After adding detector effects to the Geant4 simulation of an ILC-like ECAL, using the measured parameters, the energy resolution is found to be 35% higher than the ideal resolution, but is still lower than the resolution obtained for an equivalent analogue ECAL.
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