Background-free direction-sensitive neutron detector

Abstract

We show data from a new type of detector that can be used to determine neutron

Performance study of a directional fast neutron detection system based on TPC and plastic scintillation detectors

“…simu ( )) by a Geant4 simulation (Figure 20(a)); (2) estimating the value and resolution of the track length by choosing a narrow charge window and fitting the histogram of the track length values within the window by Gaussian function (the real resolution is smaller because the charge resolution will contribute to this estimation); and (3) fitting the experimental data ( exp ( )) using the function (Figure 20(b)). exp ( ) = simu ( scale ) + bias (5) The absolute energy scale ( scale ) and the reconstruction bias of the track length ( bias ) are estimated as 0.452 MeV/pC and 1.8 mm, respectively. The fitted standard deviation of the track length is relatively small at low energies (1.7 mm at 1.8 pC), but increases with higher energy of the recoil proton owing to the growth of contributions from the zenith angle resolution and energy resolution.…”

“…The neutron time projection chamber (TPC) [4] [5] and the neutron scatter camera [6]- [8] are two types of neutron scatter imaging systems designed for fast neutron imaging in the past decade. The neutron TPC (Figure 1 (a)) is developed for fast neutron imaging with high efficiency and a 4π field of view (FOV).…”