Speaker
Description
This work presents initial steps toward assessing the feasibility of using high-pressure helium-4 (He-4) scintillation detectors in an active-interrogation system utilising the Threshold Energy Neutron Analysis (TENA) technique for the detection of special nuclear materials (SNMs). The proposed setup consists of a deuterium–deuterium (DD) based Inertial Electrostatic Confinement (IECF) fusor as the interrogation source, arrays of Arktis S670 He-4 detectors, and the detection of neutrons with energies higher than the probing source (~2.45 MeV), which serves as a robust indicator of the presence of SNM. These detectors offer strong potential for this detection scheme due to their exceptional gamma rejection (~10⁻⁷), fast timing resolution (tens of nanoseconds), and their ability to provide information on neutron energy spectra through recoil-energy deposition.