The FoCal prototype-an extremely fine-grained electromagnetic calorimeter using CMOS pixel sensors
The FoCal prototype-an extremely fine-grained electromagnetic calorimeter using CMOS pixel sensors
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DOI：
10.1088/1748-0221/13/01/p01014
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发表时间：
2018-01-01
影响因子：
1.3
通讯作者：
Zhang, C.
中科院分区：
文献类型：
--
作者：
de Haas, A. P.;Nooren, G.;Zhang, C.
以单片有源像素传感器为有源元件，研制了硅钨电磁量能器样机。它的像素尺寸为30 μ m，可以进行数字量热法，即通过计算像素来确定粒子的能量，而不是通过测量沉积的能量。虽然尺寸不大，宽度只有四个莫里哀半径，但它有3900万像素。在这篇文章中的原型的建设和调整进行了说明。从梁测试的结果进行比较GEANT为基础的Monte Carlo模拟的预测。由电子引起的簇射的形状以前所未有的细节显示出来。能量和位置分辨率的结果也给出了。
A prototype of a Si-W EM calorimeter was built with Monolithic Active Pixel Sensors as the active elements. With a pixel size of 30 mu m it allows digital calorimetry, i.e. the particle's energy is determined by counting pixels, not by measuring the energy deposited. Although of modest size, with a width of only four Moliere radii, it has 39 million pixels. In this article the construction and tuning of the prototype is described. Results from beam tests are compared with predictions of GEANT-based Monte Carlo simulations. The shape of showers caused by electrons is shown in unprecedented detail. Results for energy and position resolution are also given.