Performance of a long plastic scintillator detector for neutron studies

We present the performance of a very long position-sensitive plastic scintillator detector, to be used in hypernuclei studies with the Finuda apparatus at the Daφne accelerator of Frascati, Italy. The detector response to neutrons of 40 < E < 100 MeV was measured in a dedicated experiment at Triumf, Vancouver. By comparing the measured response functions with the results of a Geant-based simulation, we have estimated the detector efficiency as a function of energy, light output threshold and impact position.