An active Bonner sphere spectrometer for intense neutron fields

Bedogni, R.; Gómez-Ros, J.M.; Costa, M.; Monti, V.; Durisi, Elisabetta Alessandra; Planell, O. Sans; Menzio, L.; Flammini, D.; Moro, F.; Pillon, M.; Pietropaolo, A.

doi:10.1016/j.nima.2019.06.028

Cited by 6 publications

(6 citation statements)

References 18 publications

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“…By contrast, the appearance of unexpected structures in the resulting spectrum often indicates that an inadequate starting spectrum was chosen. To unfold the data from the current experiment, a previously determined Bonner spheres spectrum [18] was used as starting spectrum. Figure 5 shows the starting spectrum as well as the unfolded one.…”

Section: Data Collection and Analysismentioning

confidence: 99%

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Measuring the near-target neutron field of a D–D fusion facility with the novel NCT-WES spectrometer

et al. 2022

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A new directional neutron spectrometer called NCT-WES (Neutron Capture Therapy Wide Energy Spectrometer) was recently developed within the INFN ENTER_BNCT project. This device constitutes a more compact and portable alternative to state-of-the-art directional neutron spectrometers. The device was used for the first time to characterise the near-target field produced by an accelerator-driven D–D fusion neutron source. NCT-WES operates as a “parallelised” Bonner spheres spectrometer, embedding six semiconductor-based thermal neutron detectors in a cylindrical moderator. Owing on a cylindrical collimating aperture, the device exhibits sharply directional response. To account for the non-uniform irradiation condition experienced in the near-target field, a dedicated NCT-WES response matrix was developed. The neutron spectrum at 0$$^{\circ }$$ ∘ from the D–D neutron target, determined by means of the FRUIT unfolding code, is coherent with that previously derived with Bonner spheres. NCT-WES proved to be a promising device for angular spectrometric characterisation of neutron-emitting targets.

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Section: Data Collection and Analysismentioning

confidence: 99%

“…Both fluence spectra are normalised to one count in the 3 He monitor and refer to a conventional distance of 100 cm, corresponding to the point where the Bonner spheres were exposed in the experiment of Ref. [18]. The FRUIT code was applied in "Special Gradient Method" [19].…”

Section: Data Collection and Analysismentioning

confidence: 99%

Measuring the near-target neutron field of a D–D fusion facility with the novel NCT-WES spectrometer

et al. 2022

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“…Ten high density polyethylene spheres, with diameter ranging from 60 mm to 200 mm, have been exposed in the irradiation volume. The spectrometric system had been previously calibrated as described in [9]. To extract the energy spectrum from the detector counts an unfolding procedure has been followed based on the FRUIT unfolding code [10,11].…”

Section: The Neutron Energy Spectrummentioning

confidence: 99%

The e_LiBANS facility: A new compact thermal neutron source based on a medical electron LINAC

Monti

Costa

Durisi

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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A new photonuclear thermal neutron facility has been developed at the Physics Department of University of Torino. The facility is based on a medical electron LINAC coupled to a compact converter and moderator assembly. A homogenous thermal neutron field of the order of 10 6 cm −2 s −1 is achievable in the enclosed irradiation cavity with low gamma and fast neutron contaminations. Its intensity can be tuned varying the LINAC current. These characteristics make the source appropriate for several applications like detectors development, material studies and BNCT preclinical research. This work describes the project and the experimental characterization of the facility. This includes the measurement of the thermal neutron fluence rate, the determination of the neutron energy spectrum and of the thermal neutron field uniformity and the evaluation of the gamma contamination.

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“…Ten high-density polyethylene spheres, with a diameter ranging from 60 mm to 200 mm, have been exposed in the irradiation cavity closed by the shielding wall. The spectrometric system had been previously calibrated as described by Bedogni et al (2019). To extract the energy spectrum from the detector counts an unfolding procedure has been followed based on the FRUIT unfolding code in Special Gradient Mode (Bedogni et al 2007(Bedogni et al , 2010Amgarou et al, 2011).…”

Section: The E_libans Neutron Fieldsmentioning

confidence: 99%

The E LiBANS project: Thermal and epithermal neutron sources based on a medical Linac

Monti

Costa

Durisi

et al. 2020

Applied Radiation and Isotopes

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An active Bonner sphere spectrometer for intense neutron fields

Cited by 6 publications

References 18 publications

Measuring the near-target neutron field of a D–D fusion facility with the novel NCT-WES spectrometer

Measuring the near-target neutron field of a D–D fusion facility with the novel NCT-WES spectrometer

The e_LiBANS facility: A new compact thermal neutron source based on a medical electron LINAC

The E LiBANS project: Thermal and epithermal neutron sources based on a medical Linac

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