The SBS Hadron Calorimeter is a transversely segmented sampling calorimeter designed to detect several GeV protons and neutrons. HCal sits behing the SBS dipole magnet which separates protons and neutrons on the surface of HCal by their charge. HCal was designed to have time resolutions as good as 0.5 ns, position resolution of 3-4 cm, and has an energy resolution of around 30%.
HCal is comprised of 288 individual detector modules. These modules are arranged in 24 rows and 12 columns.