High Spatial Resolution Fast-Neutron Imaging Detectors for Pulsed Fast-Neutron Transmission Spectroscopy
I. Mor, D. Vartsky, D. Bar, G. Feldman, M. B. Goldberg, D. Katz, E., Sayag, I. Shmueli, Y. Cohen, A. Tal, Z. Vagish, B. Bromberger, V. Dangendorf,, D. Mugai, K. Tittelmeier, M. Weierganz
TL;DR
This paper introduces two generations of high-resolution fast-neutron imaging detectors utilizing fiber scintillators and intensified cameras, enabling energy-selective neutron radiography and gamma-ray imaging for material inspection.
Contribution
The paper presents a novel detector design that combines fiber scintillators with gated ICCD systems for simultaneous multi-energy neutron imaging and gamma-ray detection.
Findings
Capable of energy-selective neutron radiography using TOF method
Simultaneous neutron and gamma-ray imaging achieved
Effective for combined low-Z and high-Z material inspection
Abstract
Two generations of a novel detector for high-resolution transmission imaging and spectrometry of fast-neutrons are presented. These devices are based on a hydrogenous fiber scintillator screen and single- or multiple-gated intensified camera systems (ICCD). This detector is designed for energy-selective neutron radiography with nanosecond-pulsed broad-energy (1 - 10 MeV) neutron beams. Utilizing the Time-of-Flight (TOF) method, such a detector is capable of simultaneously capturing several images, each at a different neutron energy (TOF). In addition, a gamma-ray image can also be simultaneously registered, allowing combined neutron/gamma inspection of objects. This permits combining the sensitivity of the fast-neutron resonance method to low-Z elements with that of gamma radiography to high-Z materials.
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