ALICE 3 experimental apparatus


ALICE 3 is a compact, next-generation multipurpose detector at the LHC as a follow-up to the present ALICE experiment. The aim is to build a nearly massless barrel detector consisting of truly cylindrical layers based on curved wafer-scale ultra-thin silicon sensors with MAPS technology, featuring an unprecedented low material budget of 0.05% X0 per layer, with the innermost layers possibly positioned inside the beam pipe. In addition to superior tracking and vertexing capabilities over a wide momentum range down to a few tens of MeV/c, the detector will provide particle identification via time-of-flight determination with about 20 ps resolution. In addition, electron and photon identification will be performed in a separate shower detector. The proposed detector is conceived for studies of pp, pA and AA collisions at luminosities a factor of 20 to 50 times higher than possible with the upgraded ALICE detector, enabling a rich physics program ranging from measurements with electromagnetic probes at ultra-low transverse momenta to precision physics in the charm and beauty sector.



ALICE 3 Working Groups:

Simulation and Physics Studies:

Experiment Subsystems:

  • Inner Tracker (Felix Reidt)
  • Outer Tracker (Henner Buesching, Laura Fabbietti, Antonin Maire)
  • Forward Conversion Tracker (Klaus Reygers)
  • Time-of-flight detectors (Stefania Bufalino, Manuel Colocci, Angelo Rivetti)
  • Ring Imaging Cherenkov detector (Giacomo Volpe)
  • Muon Identifier (Antonio Ortiz)
  • Data Flow and Processing (Vasco Barroso, Thorsten Kollegger)

Other activities:

  • Magnets, Infrastructure, Absorber (Technical Coordination)
  • Detector Readout and Links (Electronics Coordination)
  • Electromagnetic Calorimeter (Yuri Kharlov)


ALICE 3 Working Groups for the LoI preparation (2020-2022):