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ALICE: the heavy-ion experiment at the CERN/LHC

ALICE is the dedicated heavy-ion experiment at the CERN LHC. The main aim of the experiment is the detailed characterization of the properties of the quark-gluon plasma, the deconfined state of matter produced in high-energy heavy-ion collisions. The experimental setup was optimised to study high-multiplicity heavy-ion collisions and it is well suited to also study elementary reactions which are an integral part of its program. ALICE is a complex device, composed of several sub-detectors systems of different technologies which measure complementary properties of the emitted particles produced in the collision. In this article, the detector and its most important capabilities are presented.