Qualitative comparison of bremsstrahlung X-rays and 800 MeV protons for tomography of urania fuel pellets

Morris, C. L.; Bourke, M.A.M.; Byler, Darrin D.; Chen, Ching‐Fong; Hogan, G. E.; Hunter, James F.; Kwiatkowski, K.; Mariam, Fesseha; McClellan, Kenneth J.; Merrill, F. E.; Morley, D. J.; Saunders, Alexander

doi:10.1063/1.4789947

Cited by 11 publications

(11 citation statements)

References 9 publications

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Section: J Imaging 2018 4 X For Peer Reviewmentioning

confidence: 99%

“…A similar analysis problem exists with the nuclear fuel data sets collected by Tremsin et al [44] using energy-selective neutron imaging which were also characterized by 450 keV X-ray and 800 MeV proton radiography [54], leading to three separate CT data sets of identical samples ( Figure 9). To further illustrate the unique material characterization potential of combining cold and thermal neutron radiography with neutron resonance tomography, an additively manufactured (3D printed and sintered) disk-shaped tungsten object was characterized.…”

Section: J Imagingmentioning

confidence: 99%

“…As an example, for the fossil characterization conducted on Flight Path 5, Figure 10 compares thermal neutron CT with hard X-ray CT. Having both data sets available, originating from different contrast mechanisms, provides information for the paleontology community not available from a single data set. [54], 450 keV X-ray radiography (c) [54], thermal neutron radiography (d), as well as radiographs at neutron absorption resonance energies of 238 U (e) and tungsten (f) [44]. The sample orientation is not identical for each modality.…”

Section: J Imaging 2018 4 X For Peer Reviewmentioning

confidence: 99%

“…Figure 9. Photograph of five 5 mm long, 4.6 mm diameter dUO2 mock-up fuel pellets in steel cladding (a), as well as 800 MeV proton radiography (b) [54], 450 keV X-ray radiography (c) [54], thermal neutron radiography (d), as well as radiographs at neutron absorption resonance energies of 238 U (e) and tungsten (f) [44]. The sample orientation is not identical for each modality.…”

Section: J Imaging 2018 4 X For Peer Reviewmentioning

confidence: 99%

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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: J Imaging 2018 4 X For Peer Reviewmentioning

confidence: 99%

Section: J Imagingmentioning

confidence: 99%

Section: J Imaging 2018 4 X For Peer Reviewmentioning

confidence: 99%

Section: J Imaging 2018 4 X For Peer Reviewmentioning

confidence: 99%

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Neutron Imaging at LANSCE—From Cold to Ultrafast

et al. 2018

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“…A previous subset of this data were used to compare X-ray and proton radiography [35] and to demonstrate the isotopic sensitivity of resonance neutron imaging [36]. Plausible methods for using these other probes in the radiation fields of near the activated fuel rods have not been described.…”

Section: Radiography Of Surrogate Fuel Rods With the ×3 Lensmentioning

confidence: 99%

New Developments in Proton Radiography at the Los Alamos Neutron Science Center (LANSCE)

et al. 2015

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An application of nuclear physics, a facility for using protons for flash radiography, has been developed at the Los Alamos Neutron Science Center (LANSCE). Protons have proven far superior to high energy x-rays for flash radiography because of their long mean free path, good position resolution, and low scatter background. Although this facility is primarily used for studying very fast phenomena such as high explosive driven experiments, it is finding increasing application to other fields, such as tomography of static objects, phase changes in materials and the dynamics of chemical reactions. The advantages of protons are discussed, data from some recent experiments will be reviewed and concepts for new techniques are introduced.

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