Construction and Response of a Highly Granular Scintillator-based Electromagnetic Calorimeter

Abstract A highly granular electromagnetic calorimeter with scintillator strip readout is being developed for future linear collider experiments. A prototype of 21.5 X 0 depth and 180 × 180 mm 2 transverse dimensions was constructed, consisting of 2160 individually read out 10 × 45 × 3 mm 3 scintillator strips. This prototype was tested using electrons of 2–32 Ge V at the Fermilab Test Beam Facility in 2009. Deviations from linear energy response were less than 1.1%, and the intrinsic energy resolution was determined to be ( 12 . 5 ± 0 . 1 ( stat. ) ± 0 . 4 ( syst. ) ) % ∕ E [ Ge V ] ⊕ ( 1 . 2 ± 0 . 1 ( stat. ) − 0 . 7 + 0 . 6 ( syst. ) ) % , where the uncertainties correspond to statistical and systematic sources, respectively.