Lithium neutron producing target for BINP accelerator-based neutron source

Bayanov, B.; Belov, V. P.; Kindyuk, V; Oparin, E.M.; Taskaev, S. Yu.

doi:10.1016/j.apradiso.2004.05.032

Cited by 57 publications

(38 citation statements)

References 1 publication

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“…17) At these design models, Bayanov et al pointed out the radiation damages on these lithium target models 1) and a few of reports concerning about the delamination of lithium layer from the substrate during operation in a number of the reported cases including irradiation damage. 1) This problem are very important to be resolved for the maintenance of lithium target on service, therefore material research against reduction of these irradiation damages and the development of in-situ repairing and maintenance techniques are required.…”

Section: Introductionmentioning

confidence: 99%

3 KeV H2+ Irradiation to Li/Pd/Cu Trilaminar Neutron Production Target for BNCT

Ishiyama

Fujii²,

Nakamura³

et al. 2014

Mater. Trans.

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For the purpose of avoiding the radiation blistering of the lithium target for neutron production in BNCT (Boron Neutron Capture Therapy) device, trilaminar Li target, of which palladium thin layer was inserted between cupper substrate and Li layer, was newly designed. The Li/Pd/ Cu trilaminar structures of the synthesized target were characterized under 3 keV H 2 + irradiation by XPS and XAFS technique, which provides structural/electronic properties of solids, and information about the local structure, such as the nature and number of surrounding atoms and inter-atomic distances. The following conclusions were derived; PdCu physical bonding was produced between the Pd and Cu interface by electro-less plating Pd deposition on a high purity Cu plate. From the XAFS observation of white line of Pd, the Pd L 3 edge jump was found after H 2 + irradiation, this fact indicates increase of hole density in Pd 4d-band. 0.9 eV chemical shift was also observed in Pd L 3 white line for monolayer and 1 µm Pd/Cu samples, which will affect the quality of the Li/Pd/Cu target due to the formation of PdH x in palladium insert layer.

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Section: Introductionmentioning

confidence: 99%

3 KeV H2+ Irradiation to Li/Pd/Cu Trilaminar Neutron Production Target for BNCT

Ishiyama

Fujii²,

Nakamura³

et al. 2014

Mater. Trans.

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“…Bayanov et al 4) and Willis et al 5) adopted Li/Cu two layered targets and demonstrated the performance of the lithium targets used for the BNCT facilities. However, their designs face serious problems such as radiation blistering and evaporation of lithium with the progressive power run-up.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of BNCT Neutron Production Target Synthesized by In-Situ Lithium Deposition and Ion Implantation

Ishiyama

Baba

Fujii³

et al. 2013

Mater. Trans.

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To testify thermal stability of the BNCT neutron target synthesized by in-situ lithium deposition and ion implantation, laser heating test of the Li 3 N/Li/Cu tri-layered target was conducted in high vacuum chamber of 10 ¹6 Pa and thermal stability of the tri-layered target was characterized by X-ray photoelectron spectroscopy. The following conclusions were derived; (1) The Li 3 N/Li/Cu tri-layered target with very low oxide and carbon contamination was synthesized by in-situ lithium deposition and ion implantation techniques without H 2 O and O 2 additions. (2) The starting temperature of evaporation of the Li 3 N/Li/Cu tri-layered target increased by 120 K compared to that of the Li/Cu target and (3) frequent repair synthesis of the damaged Li 3 N/Li/Cu tri-layered target caused by evaporation is possible.

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“…Neutrons are generated as a result of a 7 Li(p,n) 7 Be threshold reaction by directing a proton beam, with an energy of 2 MeV and a current of up to 5 mA obtained in a tandem accelerator with vacuum insulation, to a lithium target with a diameter of 10 cm. The target is made of a thin lithium layer deposited on an efficiently-cooled substrate (in this study, copper) [5,6]. The thickness of the neutron-generating lithium layer is chosen so that the proton energy coming out from the layer is slightly below 1.882 MeV (the 7 Li(p,n) 7 Be reaction threshold).…”

Section: Introductionmentioning

confidence: 99%

In Situ Observations of Blistering of a Metal Irradiated with 2-MeV Protons

Badrutdinov

Bykov

Gromilov

et al. 2017

Metals

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A vacuum-insulated tandem accelerator was used to observe in situ blistering during 2-MeV proton irradiation of metallic samples to a fluence of up to 6.7 × 10 20 cm −2 . Samples consisting of copper of different purity, tantalum and tantalum-copper compounds were placed on the proton beam path and forced to cool. The surface state of the samples was observed using a charge-coupled device camera with a remote microscope. Thermistors, a pyrometer and an infrared camera were applied to measure the temperature of the samples during irradiation. After irradiation, the samples were analyzed on an X-ray diffractometer, laser and electron microscopes. The present study describes the experiment, presents the results obtained and notes their relevance and significance in the development of a lithium target for an accelerator-based neutron source, for use in boron neutron capture therapy of cancer.

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Lithium neutron producing target for BINP accelerator-based neutron source

Cited by 57 publications

References 1 publication

3 KeV H<sub>2</sub><sup>+</sup> Irradiation to Li/Pd/Cu Trilaminar Neutron Production Target for BNCT

3 KeV H<sub>2</sub><sup>+</sup> Irradiation to Li/Pd/Cu Trilaminar Neutron Production Target for BNCT

Thermal Stability of BNCT Neutron Production Target Synthesized by <i>In-Situ</i> Lithium Deposition and Ion Implantation

In Situ Observations of Blistering of a Metal Irradiated with 2-MeV Protons

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