ALICE upgrades during the LHC Long Shutdown 2

Abstract

A Large Ion Collider Experiment (ALICE) has been conceived and constructed as a heavy-ion experiment at the LHC. During LHC Runs 1 and 2, it has produced a wide range of physics results using all collision systems available at the LHC. In order to best exploit new physics opportunities opening up with the upgraded LHC and new detector technologies, the experiment has undergone a major upgrade during the LHC Long Shutdown 2 (2019-2022). This comprises the move to continuous readout, the complete overhaul of core detectors, as well as a new online event processing farm with a redesigned online-offline software framework. These improvements will allow to record Pb-Pb collisions at rates up to 50 kHz, while ensuring sensitivity for signals without a triggerable signature.

159 pages, 110 captioned figures, 10 tables, authors from page 153, published version, figures at http://alice-publications.web.cern.ch/node/8965

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• Progress on large area GEMs (VCI 2010)
• Charged particle detection performances of CMOS pixel sensors produced in a 0.18 um process with a high resistivity epitaxial layer
• The upgrade of the ALICE TPC with GEMs and continuous readout
• Letter of intent for ALICE 3: A next-generation heavy-ion experiment at the LHC
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• Beam-Beam Backgrounds for the Cool Copper Collider
• Sensor operating point calibration and monitoring of the ALICE Inner Tracking System during LHC Run 3