The use of electron linac for high quality thermal neutron radiography unit

Fantidis, J. G.

doi:10.1016/j.nima.2018.08.114

Cited by 7 publications

(6 citation statements)

References 38 publications

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“…From the spectra is obvious that despite the relatively soft spectra more thermalization of the beams is necessary. According to many previous works, the best material for this purpose is the high-density polyethylene (HD-PE) so HD-PE was selected as a neutron moderator [3,12].…”

Section: Neutron Sourcementioning

confidence: 99%

“…Compared to the X-ray radiography thermal NR facilities are rather rare. The reason for this is the lack of high-intensity sources [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…*Corresponding Author Institutional Email: fantidis@teiemt.gr (J. G. Fantidis) According to many previous works to increase not only the thermal NR units but also many other facilities, there is a need for non-reactor high-intensity neutron sources [3][4][5][6]. Accelerators although are not "lowpriced" but have a considerably lower cost than nuclear reactors or spallation neutron sources, and seem like the most suitable solution.…”

Section: Introductionmentioning

confidence: 99%

“…A representative unit for thermal NR based on Deuterium-Tritium, Deuterium-Deuterium or Tritium-Tritium neutron generators, 252 Cf, 241 Am/Be isotopic neutron sources, and proton or electron accelerators usually on beryllium target [3,7,[12][13][14]. The use of proton accelerators in a lithium target for NR facilities is rare.…”

Section: Introductionmentioning

confidence: 99%

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The Comparison of Neutron Beams through 7Li(p,n) Reactions for the Design of a Thermal Neutron Radiography Facility using the MCNPX Code

Fantidis

Nicolaou

2020

IJE

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In this work, a comparison of six neutron beams was carried out using the MCNPX Monte Carlo code for thermal neutron radiography purposes. The necessary neutrons produced via the 7 Li(p,n) reaction for 1 mA proton beam with energies 2.3, 2.5, 3, 4, 4.5, and 5 MeV. The design of the facility was governed from the purpose to achieve the maximum thermal neutron flux in the position of the investigated object. An extensive number of simulations were realized for every source under different conditions. The higher energy of proton beam provides higher intensity for the neutron source but at the same time, the produced spectrum shifted to the fast neutron area. Protons with energies from 2.3 to 3 MeV are more suitable when the thermal neutron content is the main issue of the facility design. Neutrons produced by proton beam in the energy range of 4-5 MeV provide higher thermal neutron fluxes at the cost of the thermal neutron content. The final choice is a compromise, between the thermal neutron content that can be tolerated, in combination with a workable thermal neutron flux.

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Section: Neutron Sourcementioning

confidence: 99%

“…Compared to the X-ray radiography thermal NR facilities are rather rare. The reason for this is the lack of high-intensity sources [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Comparison of Neutron Beams through 7Li(p,n) Reactions for the Design of a Thermal Neutron Radiography Facility using the MCNPX Code

Fantidis

Nicolaou

2020

IJE

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“…In order to overcome the lack of the nuclear reactors, the required neutron beams usually are derived by accelerators or from some isotopic sources. A typical facility includes Deuterium-Tritium (DT) [34], Deuterium-Deuterium (DD) [34]- [37], Tritium-Tritium (TT) [34], [38] neutron generators, 252 Cf [39][40][41], 241 Am/Be [42][43][44] isotopic neutron sources, proton [45] or electron [46] usually on accelerators on beryllium [10], [47][48][49][50] or lithium [51] targets.…”

Section: Introductionmentioning

confidence: 99%

Development of a Neutron Radiography System based on a 10 MeV Electron Linac

Fantidis

Nicolaou

2020

mjee

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A thermal neutron radiography unit using the neutrons which emits a 10 MeV electron linac compact has been designed and simulated via MCNPX Monte Carlo code. The facility was carried out for an extensive range of values for the collimator ratio L/D, the main parameter which describes the quality of the produced radiographic images. The results show that the presented facility provides high thermal neutron flux; while with the use of single sapphire filter fulfills all the suggested values which characterize a high quality thermal neutron radiography system. A comparison with other similar facilities indicates that the use of a photoneutron source using a 10 MeV electrons beam is a useful substitutional for radiographic purposes.

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