TY - JOUR
T1 - SiPM-based fast-neutron resonance radiography camera part I- evaluation of intrinsic factors influencing image quality in a thick neutron converter
AU - Yehuda-Zada, Y.
AU - Vartsky, D.
AU - Martínez-Lema, G.
AU - Mor, I.
AU - Cohen, E.
AU - Roy, A.
AU - Beck, A.
AU - Arazi, L.
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/4/1
Y1 - 2024/4/1
N2 - We present a new design of a fast-neutron camera based on SiPM array readout. This design has advantages over previous optical-readout designs, such as compactness and modularity. In this Part I contribution we evaluate by Geant4 Monte-Carlo simulations the hierarchy and neutron-energy-dependence of the contribution of various fast-neutron interactions and secondary processes to the creation of light and their influence on the intrinsic spatial resolution and radiographic contrast in a 200 × 200 × 50 mm3 organic scintillator screen. Specifically, the contribution of proton recoils, delta electrons, carbon recoils, high-energy electrons, positrons, alpha particles and Cherenkov radiation to the total light and their influence on the intrinsic spatial resolution was evaluated in the 2.5–14-MeV neutron energy range. In a 50-mm-thick scintillator camera the limiting intrinsic spatial resolution was about 450 μm for 14-MeV neutrons and appreciably better for lower neutron energies.
AB - We present a new design of a fast-neutron camera based on SiPM array readout. This design has advantages over previous optical-readout designs, such as compactness and modularity. In this Part I contribution we evaluate by Geant4 Monte-Carlo simulations the hierarchy and neutron-energy-dependence of the contribution of various fast-neutron interactions and secondary processes to the creation of light and their influence on the intrinsic spatial resolution and radiographic contrast in a 200 × 200 × 50 mm3 organic scintillator screen. Specifically, the contribution of proton recoils, delta electrons, carbon recoils, high-energy electrons, positrons, alpha particles and Cherenkov radiation to the total light and their influence on the intrinsic spatial resolution was evaluated in the 2.5–14-MeV neutron energy range. In a 50-mm-thick scintillator camera the limiting intrinsic spatial resolution was about 450 μm for 14-MeV neutrons and appreciably better for lower neutron energies.
KW - Fast neutron camera
KW - Geant4 simulations
KW - Neutron radiography position resolution
KW - SiPM readout
UR - http://www.scopus.com/inward/record.url?scp=85184843233&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2024.169143
DO - 10.1016/j.nima.2024.169143
M3 - Article
AN - SCOPUS:85184843233
SN - 0168-9002
VL - 1061
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 169143
ER -