Calorimeter Designs Based on Fibre-Shaped Scintillators

Crystal fibres of high density represent a flexible and powerful tool for the design of calorimeters capable to operate under the challenging environments of future accelerator experiments. The high light yield and good radiation tolerance of garnet crystal fibres allow using them as active detecting elements for detectors operating in harsh radiation environments such as those of high luminosity hadron colliders. Recent improvements in the material engineering have also demonstrated the possibility to reduce the scintillation decay time constant of garnet crystals such as LuAG, YAG and GAGG by addition of divalent ions. This makes garnet materials even more suitable for applications where the radiation detection occurs at very high rates. In the following we summarize the progress made on both technology development and detector design achieved in the past years with the goal of tailoring crystal fibres for future calorimetry applications.