Phase-contrast radiography with a polychromatic neutron beam

Kardjilov, Nikolay; Lehmann, Eberhard; Steichele, E.; Vontobel, Peter

doi:10.1016/j.nima.2004.03.176

Cited by 44 publications

(17 citation statements)

References 6 publications

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“…This equation serves as the basis of conventional transmission imaging, including radiography and computed tomography. Most recent developments in Europe on phase contrast imaging [75] and in Japan [76] on Bragg-edge contrast imaging are also transmission techniques, but less directly tied to equation 5.2. In practice, the measured quantity is the transmitted intensity of neutrons at energy E,   IE, relative to the intensity without the sample,   0 IE , i.e.,…”

Section: Transmissionmentioning

confidence: 99%

Research opportunities with compact accelerator-driven neutron sources

et al. 2016

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Since the discovery of the neutron in 1934 neutron beams have been used in a very broad range of applications, As an aging fleet of nuclear reactor sources is retired the use of compact accelerator-driven neutron sources (CANS) are becoming more prevalent. CANS are playing a significant and expanding role in research and development in science and engineering, as well as in education and training. In the realm of multidisciplinary applications, CANS offer opportunities over a wide range of technical utilization, from interrogation of civil structures to medical therapy to cultural heritage study. This paper aims to provide the first comprehensive overview of the history, current status of operation, and ongoing development of CANS worldwide. The basic physics and engineering regarding neutron production by accelerators, target-moderator systems, and beam line instrumentation are introduced, followed by an extensive discussion of various evolving applications currently exploited at CANS.

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Section: Transmissionmentioning

confidence: 99%

Research opportunities with compact accelerator-driven neutron sources

et al. 2016

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“…Si: 60µm -Al: 50µm Fig. 6.17 Calculated phase contrast (top; x-scale in mm, y-scale in arbitrary units) for a phase step consisting of silicon and aluminum (bottom) [12] The phase development quite close behind the sample yields strong intensity oscillations that can be measured at different distances from the object [18]. Very often, another concept is used to describe this phase contrast correctly via geometric considerations of refraction by edges [19].…”

Section: Phase Contrast Refraction and Small-angle Tomographymentioning

confidence: 99%

Neutron Tomography

Treimer

2009

Neutron Imaging and Applications

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This chapter provides an introduction to neutron tomography. The basic factors influencing instrument design and capability are discussed and the mathematical methods used for image reconstruction are explained. Some of the more promising new techniques, which are likely to have an increasing range of applications, are described in more detail. These include energy (wavelength)-dispersive radiography and tomography, real-time radiography, phase contrast, refraction, and small-angle tomography. In the latter methods, there is an interesting overlap/complementarity between the real-space imaging aspects and the Fourier space imaging aspects, particularly as this gives rise to the possibility of imaging to a resolution of 10 mm or better.

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“…The [29], crystallographic phases and crystalline orientations [30], and several application in Material Science [31], Biology, Geology, etc. [29,[32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Development of a novel neutron detection technique by using a boron layer coating a Charge Coupled Device

Blostein¹,

Estrada²,

Tartaglione³

et al. 2015

J. Inst.

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This article describes the design features and the first test measurements obtained during the installation of a novel high resolution 2D neutron detection technique. The technique proposed in this work consists of a boron layer (enriched in 10 B) placed on a scientific Charge Coupled Device (CCD). After the nuclear reaction 10 B(n,) 7 Li, the CCD detects the emitted charge particles thus obtaining information on the neutron absorption position. The abovementioned ionizing particles, with energies in the range 0.5-5.5 MeV, produce a plasma effect in the CCD which is recorded as a circular spot. This characteristic circular shape, as well as the relationship observed between the spot diameter and the charge collected, is used for the event recognition, allowing the discrimination of undesirable gamma events. We present the first results recently obtained with this technique, which has the potential to perform neutron tomography investigations with a spatial resolution better than that previously achieved. Numerical simulations indicate that the spatial resolution of this technique will be about 15 m, and the intrinsic detection efficiency for thermal neutrons will be about 3 %. We compare the proposed technique with other neutron detection techniques and analyze its advantages and disadvantages.

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Phase-contrast radiography with a polychromatic neutron beam

Cited by 44 publications

References 6 publications

Research opportunities with compact accelerator-driven neutron sources

Research opportunities with compact accelerator-driven neutron sources

Neutron Tomography

Development of a novel neutron detection technique by using a boron layer coating a Charge Coupled Device

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