Initial development and testing of dysprosium-based scintillators for digital transfer method neutron imaging
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Engineering topics
Lehmann, Eberhard H.
Publications and source records attributed to Lehmann, Eberhard H..
Improvement in the spatial resolution for imaging with fast neutrons
In this paper, we report on the realization of an improved concept for the detection of fast neutrons using a specific setup of scintillators with the aim to overcome limitations in spatial resolution. While fast neutron imaging (FNI) is a technique to investigate very thick material layers in transmission mode, currently there is a limit in the spatial resolution at ~1 mm, which hinders the performance for the detection of features like cracks, material damage or pores in large objects ($\gg$1 cm 3 ). The improved concept presented here is based on the separation of the converter material from the scintillation layer in a suitable way, which was successfully tested and referenced to the standard devices at the NECTAR facility (FRM-2, MLZ, Garching) under realistic beamline conditions. The results imply a break-through in enabling detection of structures on the order of 0.2 to 0.5 mm (a more precise estimation is not possible due to other resolution determing factors in a realistic setup). Potential additional improvements are discussed.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗