论文标题
LHC中的爱丽丝电磁热量表的性能1和2升级项目
Performance of the ALICE electromagnetic calorimeters in LHC Runs 1 and 2 and upgrade projects
论文作者
论文摘要
LHC上的爱丽丝（一个大离子对撞机实验）设计用于在极端温度和能量密度下的核物质研究，所谓的夸克 - 格鲁恩等离子体（QGP）。将两个用于测量电磁信号的检测器，高粒度光子光谱仪PHO和大型接受电磁量热计EMCAL/DCAL，并纳入了爱丽丝设备中。为了增强光谱的高能部分的数据样本，使用了高能光子或喷气器上的专用触发器。中性介体的高精度测量需要精细的能量和时机校准。使用基于群集形状和与爱丽丝中央跟踪系统的反向轨道匹配的专用光子PID标准以及位于称为CPV的PHOS前面的特殊检测器，改善了光子信号纯度。 PHO和EMCAL参加了LHC Run 1（2009-2013）和运行2（2015-2018）在PP，P-PB和PB-PB碰撞的数据期间。我们概述了他们在低和高多样性环境中的1和2跑步中的性能，以及未来LHC运行的升级计划。
ALICE (A Large Ion Collider Experiment) at the LHC is designed for studies of nuclear matter at extreme temperatures and energy densities, so called Quark-Gluon Plasma (QGP). Two detectors for measurements of electromagnetic signals, high-granularity photon spectrometer PHOS and large acceptance electromagnetic calorimeter EMCal/DCal, are incorporated into the ALICE apparatus. In order to enhance the data sample of the high-energy part of the spectra, a dedicated triggers on high energetic photons or jets are used. High precision measurements of neutral mesons require fine energy and timing calibrations. Photon signal purity is improved using dedicated photon PID criteria based on cluster shape and anti-track matching with the ALICE central tracking system, as well as a special detector located in front of PHOS called CPV. PHOS and EMCal participated in LHC Run 1 (2009-2013) and Run 2 (2015-2018) during data taking periods of pp, p-Pb and Pb-Pb collisions. We give an overview of their performance in Runs 1 and 2 in low and high multiplicity environments as well as the upgrade plans for future LHC runs.
