Time gating for energy selection and scatter rejection: High-energy pulsed neutron imaging at LANSCE

Swift, Alicia L.; Schirato, R.; McKigney, Edward A.; Hunter, James F.; Temple, Brian

doi:10.1117/12.2188440

Cited by 3 publications

(2 citation statements)

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“…The TOF camera system can provide scattering rejection in neutron imaging, as well as energy-selective images as shown here. Further details of this system are given in References [80,81]. …”

Section: High-energy Neutron Time-of-flight Imaging System Resultsmentioning

confidence: 99%

Neutron Imaging at LANSCE—From Cold to Ultrafast

et al. 2018

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(Lujan center), Flight Path 5 beam line and continues to be refined. Applications include: imaging of metallic and ceramic nuclear fuels, fission gas measurements, tomography of fossils and studies of dopants in scintillators. The technique provides the ability to characterize materials opaque to thermal neutrons and to utilize neutron resonance analysis codes to quantify isotopes to within 0.1 atom %. The latter also allows measuring fuel enrichment levels or the pressure of fission gas remotely. More recently, the cold neutron spectrum at the ASTERIX beam line, also located at Target 1, was used to demonstrate phase contrast imaging with pulsed neutrons. This extends the capabilities for imaging of thin and transparent materials at LANSCE. In contrast, high-energy neutron imaging at LANSCE, using unmoderated fast spallation neutrons from Target 4 [Weapons Neutron Research (WNR) facility] has been developed for applications in imaging of dense, thick objects. Using fast (ns), time-of-flight imaging, enables testing and developing imaging at specific, selected MeV neutron energies. The 4FP-60R beam line has been reconfigured with increased shielding and new, larger collimation dedicated to fast neutron imaging. The exploration of ways in which pulsed neutron beams and the time-of-flight method can provide additional benefits is continuing. We will describe the facilities and instruments, present application examples and recent results of all these efforts at LANSCE.

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Section: High-energy Neutron Time-of-flight Imaging System Resultsmentioning

confidence: 99%

Neutron Imaging at LANSCE—From Cold to Ultrafast

et al. 2018

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“…First tests were carried out at the pulsed spallation neutron source at Los Alamos National Laboratories at the Lujan Center for Neutron Scattering (LANSCE). Images were taken at Flight Path 60 Right (FP60R) usig a light-tight detector box [13]. After the neutrons passed through a step wedge designed for resolution studies with fast neutrons they were incident on the scintillator screens being tested.…”

Section: Initial Study At Lanlmentioning

confidence: 99%