Speaker
Description
Among future collider proposals, the Muon Collider stands out for its unique potential in advancing energy frontier research. However, a major challenge arises from Beam-Induced Background (BIB), caused by muon decay along the beam pipe, which complicates detector design and event reconstruction. Despite the use of tungsten conical absorbers (nozzles) in the forward regions, an irreducible component of BIB reaches the detector, characterized by low-momentum particles and delayed arrival relative to the bunch crossing. The BIB flux on the barrel inner face of the electromagnetic calorimeter reaches approximately 300 particles per cm$^2$, with a total ionizing dose of ~1 kGy/year and a neutron fluence of 10$^{14}$ n$_{1\, MeVeq}$ cm$^{-2}$ per year.
To address these challenges, innovative mitigation strategies are essential. One promising approach is CRILIN (CRystal calorImeter with Longitudinal INformation), a semi-homogeneous electromagnetic calorimeter employing Lead Fluoride (PbF₂) crystals read by UV-extended Silicon Photomultipliers. Designed with high granularity, longitudinal segmentation, and excellent timing capabilities, CRILIN has the potential to significantly reduce BIB effects while achieving high energy resolution (< 10 %/$\sqrt{E}$). This talk will present simulation results evaluating CRILIN’s performance, along with recent experimental findings from prototype tests, highlighting its potential in the challenging Muon Collider environment.
