Development and characterization of a D–D fast neutron generator for imaging applications

Adams, R.E.; Bort, Lorenz; Zboray, Robert; Prasser, H.-M.

doi:10.1016/j.apradiso.2014.11.017

Cited by 22 publications

(7 citation statements)

References 7 publications

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“…The possibilities and applications of fission and fast neutron imaging are still very limited. This technique keeps gaining increasing interest due to the availability of small accelerator-based or D-D, D-T neutron generators providing acceptable neutron fluxes [14][15][16][17]. Therefore, there is a growing demand for development of fast neutron imaging technologies and, in particular, fast neutron detection.…”

Section: Introductionmentioning

confidence: 99%

Performance of the Commercial PP/ZnS:Cu and PP/ZnS:Ag Scintillation Screens for Fast Neutron Imaging

Makowska

Walfort²,

Zeller³

et al. 2017

J. Imaging

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Abstract:Fast neutron imaging has a great potential as a nondestructive technique for testing large objects. The main factor limiting applications of this technique is detection technology, offering relatively poor spatial resolution of images and low detection efficiency, which results in very long exposure times. Therefore, research on development of scintillators for fast neutron imaging is of high importance. A comparison of the light output, gamma radiation sensitivity and spatial resolution of commercially available scintillator screens composed of PP/ZnS:Cu and PP/ZnS:Ag of different thicknesses are presented. The scintillators were provided by RC Tritec AG company and the test performed at the NECTAR facility located at the FRM II nuclear research reactor. It was shown that light output increases and the spatial resolution decreases with the scintillator thickness. Both compositions of the scintillating material provide similar light output, while the gamma sensitivity of PP/ZnS:Cu is significantly higher as compared to PP/ZnS:Ag-based scintillators. Moreover, we report which factors should be considered when choosing a scintillator and what are the limitations of the investigated types of scintillators.

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Section: Introductionmentioning

confidence: 99%

Performance of the Commercial PP/ZnS:Cu and PP/ZnS:Ag Scintillation Screens for Fast Neutron Imaging

Makowska

Walfort²,

Zeller³

et al. 2017

J. Imaging

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show abstract

“…Here the goal is a compact and mobile source which possibly can even provide multiple beam spots around the perimeter of a Downloaded by [New York University] at 04:03 27 May 2015 tomographic circle consisting of multiple point sources and a detector arc [12,13]. The total yield is 10 7 s -1 in d-D operation and further optimisation is required.…”

Section: Fast Neutron Production For Imaging Applicationsmentioning

confidence: 98%

“…At PSI a compact fast neutron tomography system for investigating two-phase coolant fl ow around mock up nuclear fuel rods is being developed [12,13].…”

Section: Potential and Status In Imaging With Fast Neutronsmentioning

confidence: 99%

Potential and status in imaging with fast neutrons

Dangendorf

Zboray

2015

Neutron News

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“…For example, a very small spot size (approximately 1-2 mm) is needed for fast neutron imaging because it enhances the sharpness of the image [16]. However, this requirement limits the beam current the target can handle, which in turn, limits the neutron yield at a given acceleration voltage.…”

Section: Ion Beam Extraction Analysismentioning

confidence: 99%

Design, construction, and characterization of a compact DD neutron generator designed for 40Ar/39Ar geochronology

Ayllon,

Adams,

Bauer

et al. 2018

Preprint

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A next-generation, high-flux DD neutron generator has been designed, commissioned, and characterized, and is now operational in a new facility at the University of California Berkeley. The generator, originally designed for 40 Ar/ 39 Ar dating of geological materials, has since served numerous additional applications, including medical isotope production studies, with others planned for the near future. In this work, we present an overview of the High Flux Neutron Generator (HFNG) which includes a variety of simulations, analytical models, and experimental validation of results. Extensive analysis was performed in order to characterize the neutron yield, flux, and energy distribution at specific locations where samples may be loaded for irradiation. A notable design feature of the HFNG is the possibility for sample irradiation internal to the cathode, just 8 mm away from the neutron production site, thus maximizing the neutron flux (n/cm 2 /s). The generator's maximum neutron flux at this irradiation position is 2.58 ×10 7 n/cm 2 /s ± 5% (approximately 3×10 8 n/s total yield) as measured via activation of small natural indium foils. However, future development is aimed at achieving an order of magnitude increase in flux. Additionally, the deuterium ion beam optics were optimized by simulations for various extraction configurations in order to achieve a uniform neutron flux distribution and an acceptable heat load. Finally, experiments were performed in order to benchmark the modeling and characterization of the HFNG.

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Development and characterization of a D–D fast neutron generator for imaging applications

Cited by 22 publications

References 7 publications

Performance of the Commercial PP/ZnS:Cu and PP/ZnS:Ag Scintillation Screens for Fast Neutron Imaging

Performance of the Commercial PP/ZnS:Cu and PP/ZnS:Ag Scintillation Screens for Fast Neutron Imaging

Potential and status in imaging with fast neutrons

Design, construction, and characterization of a compact DD neutron generator designed for 40Ar/39Ar geochronology

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