Accurate determination of the fast-neutron detection efficiency for organic scintillators using a collimated neutron beam

Weber, C.; Fabry, I.; Huhn, V.; Siepe, A.; Witsch, W. von

doi:10.1016/s0168-9002(02)00432-1

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…The efficiency of the detectors to 2.45 MeV neutrons from the DD fusion reaction has been determined by a combination of MCNP simulations [11] and absolute calibration of the acquisition energy threshold in an MeV electron equivalent using multiple standard γ-ray sources. The results of such simulations agree with similar Monte Carlo simulations available in the literature validated by measurements of the efficiency to mono-energetic neutron beams [12][13][14][15][16].…”

Section: Fusion Product Diagnostics and Transp/ Nubeam Simulationssupporting

confidence: 80%

Discrepancy between estimated and measured fusion product rates on MAST using TRANSP/NUBEAM

Cecconello¹,

Boeglin²,

Keeling³

et al. 2018

Nucl. Fusion

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Experimental evidence is presented of a discrepancy between the predicted and measured D–D fusion product rates on MAST. Both the neutron and proton production rates, measured independently with a neutron camera and charged fusion product detector array, are approximately 40% lower than those predicted by TRANSP/NUBEAM codes. This deficit is scenario independent and cannot be explained by uncertainties in the typical plasma parameters suspected for such discrepancies, such as electron temperature, the plasma effective charge and the injected neutral beam power. Instead, a possible explanation is an overestimate of the neutron emissivity due to the guiding centre approximation used in NUBEAM to model the fast ion orbits.

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Section: Fusion Product Diagnostics and Transp/ Nubeam Simulationssupporting

confidence: 80%

Discrepancy between estimated and measured fusion product rates on MAST using TRANSP/NUBEAM

Cecconello¹,

Boeglin²,

Keeling³

et al. 2018

Nucl. Fusion

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show abstract

“…For every recoil proton detected at an angle theta, the scattered neutron goes at the complementary angle at the opposite side of the beam according to non-relativistic kinematics. Small corrections are then made to account for edge-effects in the scintillator, and the neutron detection efficiency can then be determined to approximately 2% [47].…”

Section: Detector Efficiency Determinationmentioning

confidence: 99%

Fast-neutron detectors for nuclear physics experiments

Haight

2012

J. Inst.

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Fast-neutron detectors are used in a wide range of nuclear physics experiments including studies of elastic and inelastic neutron scattering, charge-exchange reactions, photonuclear reactions, neutron-induced fission, and, especially recently, reactions of radioactive nuclei. Although many of the detectors being developed now are based on technologies that are several decades old, new physics is now accessible due to the advent of advanced accelerators, and these facilities present challenging opportunities for detecting fast neutrons. The choice of detectors, their appropriateness for particular measurements and how they are integrated into experiments will be discussed. Detector arrays are of particular importance these days to study angular distributions or simply to increase the solid angle coverage to increase the data rate. Modeling the response of the detectors has become much more important in order to understand better their response and to calculate effects of neutron scattering in the experimental area, including detector-to-detector scattering. Data acquisition through waveform digitizers is now common and leads to more information from each event as well as significant reductions in dead time and in the complexity of the electronics. At the same time, analyzing waveforms in real time presents challenges in terms of handling large amounts of information. Examples of significant improvements in the utilization of neutron detectors in physics experiments, in the characterization of the detector response, and in signal processing will be presented. KEYWORDS: Instrumentation and methods for time-of-flight (TOF) spectroscopy; Neutron detectors (cold, thermal, fast neutrons); Instrumentation and methods for heavy-ion reactions and fission studies

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Contribution of random noise in the ITER RNC diamond neutron detectors pulses to the counting rate uncertainty

Riva

Esposito

Marocco

et al. 2019

Fusion Engineering and Design

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Accurate determination of the fast-neutron detection efficiency for organic scintillators using a collimated neutron beam

Cited by 9 publications

References 4 publications

Discrepancy between estimated and measured fusion product rates on MAST using TRANSP/NUBEAM

Discrepancy between estimated and measured fusion product rates on MAST using TRANSP/NUBEAM

Fast-neutron detectors for nuclear physics experiments

Contribution of random noise in the ITER RNC diamond neutron detectors pulses to the counting rate uncertainty

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