Feb 21 – 25, 2022
Vienna University of Technology
Europe/Vienna timezone

Scintillating sampling ECAL technology for the Upgrade II of LHCb

Feb 23, 2022, 11:25 AM
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Live Presentation Calorimeters Large Detector Systems


Marco Pizzichemi (Universita Milano-Bicocca (IT) and CERN)


The aim of the LHCb Upgrade II is to operate at a luminosity in the range of 1 to 2 x 10$^{34}$ cm$^{-2}$ s$^{-1}$ to collect a data set of 300 fb$^{-1}$. This will require a substantial modification of the current LHCb ECAL due to high radiation doses in the central region and increased particle densities. The ECAL has to provide good energy and position resolutions in these conditions. Timing capabilities with tens of picoseconds precision for neutral electromagnetic particles and increased granularity with denser absorber in the central region are needed for pile-up mitigation.
Several scintillating sampling ECAL technologies are currently being investigated for this purpose: Spaghetti Calorimeter (SpaCal) with garnet scintillating crystals and tungsten absorber, SpaCal with scintillating plastic fibres and tungsten or lead absorber, and Shashlik with polystyrene tiles, lead absorber and fast WLS fibres. Results from an ongoing R&D campaign to optimise the Upgrade II ECAL are shown. This includes studies of radiation-hard scintillation materials, performance optimisation using detailed simulations and test beam measurements. The presentation also includes an overview of the overall plans for the Upgrade II of the LHCb ECAL.

Primary experiment LHCb

Primary authors

Marco Pizzichemi (Universita Milano-Bicocca (IT) and CERN) Philipp Roloff (CERN)

Presentation materials