Speaker
Description
The LHCb Upgrade phase II aims to collect $300 fb^{-1}$ in a few years operating at a luminosity of $1.5*10^{34} cm^{-2} s^{-1}$. This requires a significant change of the systems including the electromagnetic calorimeter (ECAL), which must be capable to sustain integrated radiation doses up to 1 MGy in the innermost region. The second major requirement is time resolution of the order of a few tens of picoseconds. The new ECAL will be subdivided into zones: spaghetti calorimeter (SPACAL) in the central part with the highest expected radiation doses and zones with Shashlik-type modules of different granularity.
The SPACAL region is subdivided into an innermost region with tungsten 3D-printed absorber and radiation hard crystals (e.g. GAGG, GFAG) with $15*15mm^2$ cell size, and an intermediate region with a cast lead-based absorber and polystyrene scintillating fibres.
This talk presents the results of the first cast lead-polystyrene spacal prototype studies performed with an electron beam at the CERN SPS test-beam facility.
