Design for a Next-Generation Neutron Detector

Having good detection techniques allows one to understand the physics and structure of neutron-rich nuclei beyond the neutron dripline. The Facility for Rare Isotope Beams (FRIB) will give access to more exotic nuclei where multi-neutron decay is expected. The next generation MoNA1 detector will need to measure multi-neutron events, and improved algorithms are needed to enhance the extraction of these events with a good signal to noise ratio (cross-talk). A complete Geant4 simulation was developed to study the possible configurations of this new array. Implemented models include a description of multi-neutron decays, including n-n signature correlations. Various combinations of geometrical parameters were simulated and analyzed. The resolution and efficiency of the detector were calculated for 1n through 4n decay for each case.