Analysis of the scattered neutron energy spectrum from magnetized liner inertial fusion implosions on Z

The neutron energy spectrum emitted from magnetized liner inertial fusion (MagLIF) implosions performed at the Z machine are made using a suite of neutron time of flight (nToF) detectors located along both axial and radial lines of sight. Measurements of the primary deuterium-deuterium (DD) fusion neutron energy spectrum are routinely used to infer the fusion yield and the hot spot apparent ion temperature. In this work, measurements of the scattered neutron energy spectrum will be used to study the conditions of the dense beryllium liner which surrounds and inertially confines the hot spot plasma in these experiments. Specifically, the beryllium liner areal density is inferred by measuring the ratio of the fusion yield to the number of scattered neutrons. Results from experiments using different initial target aspect ratios will be presented and a comparison will be made between measurements along the axial and radial nTOF lines of sight.