标题： ALICE前向电磁量能器的原型研究 显示英文标题

标题： Prototype studies for a forward EM calorimeter in ALICE

摘要： 基于硅钨（SiW）技术的前置电磁量能器（FoCal）正在被考虑作为ALICE探测器的可能升级方案。 该设备尤其应具备极高的分辨本领，从而实现高动量范围内的光子/π0区分。 对于高分辨本领层的主要考虑方案是使用互补金属氧化物半导体（CMOS）像素传感器。 我们将讨论提议的量能器的动机和设计原理，然后重点关注全CMOS像素量能器原型的经验。 该设备的初步结果显示了非常出色的簇展轮廓测量能力，并且线性和分辨率结果合理，但受到目前尚未完成的校准的限制。 显示英文摘要

摘要： A forward electromagnetic calorimeter (FoCal) based on SiW technology is being considered as a possible upgrade to the ALICE detector. This device should in particular feature an extremely high granularity allowing gamma/pi0 discrimination out to very high momenta. The main option considered for the high granularity layers is the use of CMOS pixel sensors. We will discuss the motivation and design principles of the proposed calorimeter and will then focus on the experience gained with a full CMOS-pixel calorimeter prototype. Preliminary results of this device show very good capabilities for shower profile measurements, and reasonable results for linearity and resolution, which are limited by the currently incomplete calibration.