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ALICE upgrades during the LHC Long Shutdown 2

Abstract

A Large Ion Collider Experiment (ALICE) has been conceivedand constructed as a heavy-ion experiment at the LHC. During LHCRuns 1 and 2, it has produced a wide range of physics results usingall collision systems available at the LHC. In order to bestexploit new physics opportunities opening up with the upgraded LHCand new detector technologies, the experiment has undergone a majorupgrade during the LHC Long Shutdown 2 (2019–2022). This comprisesthe move to continuous readout, the complete overhaul of coredetectors, as well as a new online event processing farm with aredesigned online-offline software framework. These improvementswill allow to record Pb-Pb collisions at rates up to 50 kHz, whileensuring sensitivity for signals without a triggerable signature

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