Relative pre-calibration of the ALICE electromagnetic calorimeter EMCAL

被引：0
|
作者：
Faivre, J. [1 ]
机构：
[1] Univ Grenoble 1, LPSC, CNRS IN2P3, Inst Polytech Grenoble, Grenoble, France
来源：
XIV INTERNATIONAL CONFERENCE ON CALORIMETRY IN HIGH ENERGY PHYSICS (CALOR 2010) | 2011年 / 293卷
关键词：
D O I：
10.1088/1742-6596/293/1/012046
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Several experiments showed that calorimetry is an essential tool for the Quark-Gluon Plasma study. ALICE, on the LHC collider, therefore integrated two electromagnetic calorimeters in its design. We will explain how the relative pre-calibration of one of them, the EMCAL, is performed thanks to cosmic muons, through an iterative procedure which consists in varying the high-voltage associated to each channel to ajust its gain. After 3 iterations of high-voltage tuning, of which each requires a day of data-taking, the dispersion (RMS over mean) of the channel amplitude of the response to a muon at minimum ionisation is found to be less than 2 %. We also show that more iterations allow to lower this value down to 1 %.
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页数：6
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