THE ATLAS ELECTROMAGNETIC CALORIMETERS: FEATURES AND PERFORMANCE

被引：1
|
作者：
Mandelli, Luciano [1 ]
机构：
[1] Ist Nazl Fis Nucl, Sez Milan, I-20133 Milan, Italy
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2010年 / 25卷 / 09期
关键词：
LHC; ATLAS experiment; DETECTOR;
D O I：
10.1142/S0217751X10049323
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
In this paper it is shown how a sampling electromagnetic calorimeter based on the liquid argon technique satisfies the very demanding requirements of an experiment at the LHC. Section 2 discusses, using a simplified model, the performance that can be achieved in terms of response time, energy resolution and transverse granularity. Section 3 describes how the calorimeters are realized in ATLAS, their segmentation and how from the readout pulses the energy deposited in the calorimeter is computed. The motivations of a presampler detector in front of the calorimeter are also discussed. Section 4 describes how the energy, position and direction of an electron and a photon are computed. Finally, Sec. 5 briefly illustrates the rejection power of the calorimeter against the hadrons and mentions how a Higgs boson signal in the gamma gamma channel can already be detected with a luminosity of 10 fb(-1).
引用
收藏
页码：1739 / 1760
页数：22
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