Neutron spectrometer for fast nuclear reactors

Osipenko, M.; Ripani, M.; Ricco, G.; Caiffi, B.; Pompili, F.; Pillon, M.; Angelone, M.; Verona-Rinati, G.; Cardarelli, R.; Mila, G.; Argirò, S.

doi:10.1016/j.nima.2015.07.050

Cited by 14 publications

(20 citation statements)

References 8 publications

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“…shoulder of the peak is not altered by the energy loss we obtained spectrometer total energy resolution of 72 keV (RMS), similar to that found in Ref. [2] with charge sensitive amplifiers. The spectrometer demonstrated a very good timing resolution.…”

Section: Datasupporting

confidence: 89%

“…for 2.5 MeV neutrons. The last value includes also incident neutron energy uncertainty.The total number of events in DD-peak was about 130, which allowed to confirm the expected spectrometer absolute efficiency value of 4.5 × 10 −9 1/nv at neutron energy of 2.5 MeV with 9% statistical and 20% systematic[2] uncer-Total energy deposited in the spectrometer measured in coincidence at FNG with TiD target in comparison with Geant4 simulations normalized to the measured neutron fluence.…”

supporting

confidence: 57%

“…At the borders of contact area two 200 µm wide and 150 nm thick strips were added, similar to those in Ref. [2].…”

Section: Detector Upgradementioning

confidence: 99%

“…The first prototype of the spectrometer was calibrated in Ref. [2] at two neutron energies and tested in fast fission reactor in Ref. [3].…”

Section: Introductionmentioning

confidence: 99%

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Upgrade of the compact neutron spectrometer for high flux environments

Osipenko

Bellucci

Ceriale

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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In this paper a new version of 6 Li-based neutron spectrometer for high flux environments is described. The new spectrometer was built with commercial single crystal Chemical Vapour Deposition diamonds of electronic grade. These crystals feature better charge collection as well as higher radiation hardness.Ohmic metal contacts were deposited on the diamonds suppressing build-up of space charge observed in the previous prototypes. New passive preamplification of signal at detector side was implemented to improve the resolution. This preamplification is based on RF transformer not sensitive to high neutron flux.Compact mechanical design allowed to reduce detector size to a tube of 1 cm diameter and 13 cm long. The spectrometer was tested in thermal column of TRIGA reactor and at DD neutron generator. The test results indicate an energy resolution of 72 keV (RMS) and coincidence timing resolution of 68 ps (RMS). The measured data are in agreement with Geant4 simulations except for larger energy loss tail presumably related to imperfections of metal contacts and glue expansion.

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Section: Datasupporting

confidence: 89%

supporting

confidence: 57%

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Upgrade of the compact neutron spectrometer for high flux environments

Osipenko

Bellucci

Ceriale

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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“…The spectrometer is aimed for a typical fission spectrum < 6 MeV, where no other open reactions with two charged particle products appear. The first prototype of the spectrometer was calibrated at TRIGA of LENA (Pavia) to determine its response to the thermal (graphite column) neutrons and FNG of ENEA (Frascati) to determine its response to the fast (DD-fusion) neutrons [21] and then measured the neutron spectrum of the fast reactor TAPIRO of ENEA (Casaccia) [22]. We obtained the neutron energy resolution of 73 keV with the standard charge sensitive electronics and <160 keV with fast electronics.…”

Section: Pos(ifd2015)023mentioning

confidence: 99%

New neutron detections

Osipenko¹

2017

Proceedings of INFN Workshop on Future Detectors — PoS(IFD2015)

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Neutron detection is a broad field for fundamental research and applications. Its development is presently following an evolutionary scenario when the known detector technologies are being improved in their performances. Important advances are made by developing Pulse Shape Discrimination capable plastic and polysiloxane scintillators, which combine n/γ separation with handling simplicity of solid scintillators. GEM and MicroMega detectors promise to make a breakthrough in the neutron imaging applications, providing a good spacial resolution combined with a large detector area. Diamond detectors allow to exploit the semiconductor detector advantages in very high neutron fluxes of fission or fusion reactors. These and many other developments are ongoing and will be implemented in upcoming experiments and applied research facilities. INFN Workshop on Future Detectors for HL-LHC

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High‐Performance Single‐Crystal Diamond Detector for Accurate Pulse Shape Discrimination Based on Self‐Organizing Map Neural Networks

Huang

Li²,

Wang³

et al. 2021

Advanced Photonics Research

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The extraordinary properties of diamond, such as ultrawide bandgap (%5.5 eV), radiation hardness, high resistivity, and high carrier mobility, make it an ideal material for robust radiation detectors yet with a simple structure. [1][2][3][4] In recent years, the quality of chemical vapor deposition (CVD) single-crystal diamond (SCD) has been greatly improved, [5] which makes SCD detectors possible in counting and spectroscopy applications. At present, SCD detectors are widely used in fusion experiments, medical, and fission reactor applications, which are emerging as nextgeneration semiconductor radiation detectors with great potential. [6] Due to the extremely high resistivity of the diamond film [7] (usually > 10 12 Ω cm), the device configuration of the SCD detector is simple, not requiring p-n junctions for low leakage current as any other counterpart. [8,9] In general, the SCD detector utilizes a vertical "sandwich" layout of a metal-semiconductor-metal (MSM) structure with low capacitance, fast response, and low noise. [10] The physical mechanism of SCD detectors is similar to that of other semiconductor detectors, operated by generating current out of ionizing radiation. [11] SCD detectors therefore can be used to measure α-particles, electrons, [12] X-rays, γ-rays, [13] and neutrons. [14] However, these applications rely on the high performance of the detector, in which charge collection efficiency (CCE), energy resolution, and time response are the three leading criteria to evaluate the performance of SCD detectors. The detector's performance greatly depends on the properties of the diamond. [15,16] In addition, accurate neutron monitoring in high-radiation flux of the fission and fusion reactors [17,18] requires algorithms that can distinguish the signals of interests from the background. As SCD detectors are sensitive to γ-rays, it is necessary in these applications to distinguish neutrons from γ-rays background. In fact, high-energy neutron radiation would induce "point-like" ionizations over the entire volume of the SCD, as heavily charged products of the nuclear reaction are greatly localized with their short range. However, this is different from the effects caused by the incident γ-rays. When the MeV

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Neutron spectrometer for fast nuclear reactors

Cited by 14 publications

References 8 publications

Upgrade of the compact neutron spectrometer for high flux environments

Upgrade of the compact neutron spectrometer for high flux environments

New neutron detections

High‐Performance Single‐Crystal Diamond Detector for Accurate Pulse Shape Discrimination Based on Self‐Organizing Map Neural Networks

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