Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: Feasibility study in a thermal neutron beam

Margato, L.M.S.; Morozov, A.; Blanco, A.; Fonte, P.; Fraga, F.A.F.; Guérard, B.; Hall-Wilton, R.; Höglund, Carina; Mangiarotti, A.; Robinson, L.; Schmidt, S.; Zeitelhack, K.

doi:10.1088/1748-0221/14/01/p01017

Cited by 13 publications

(16 citation statements)

References 31 publications

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“…Sensitivity to thermal neutrons in a 10 B-RPCs detector is achieved through the capture reaction 10 B (n, α) 7 Li in the 10 B 4 C layers [5,11]. Using a single-gap 10 B-RPC prototype in a hybrid configuration, in which cathodes are metallic [12], we have demonstrated that this detection technology is feasible for position-sensitive thermal neutron detectors: the detector features a wide plateau and the spatial resolution is better than 0.5 mm (FWHM) [12]. However, the thermal neutron detection efficiency obtained with a single converter layer orientated orthogonally to the neutron beam is quite low (≈ 6% at  = 2.5 Å) in comparison to almost 100% efficiency available with 3 He-based detectors.…”

Section: Introductionmentioning

confidence: 99%

Multilayer ¹⁰B-RPC neutron imaging detector

et al. 2020

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Resistive plate chambers (RPC) lined with 10 B 4 C neutron converters is a promising cost-effective technology for position-sensitive thermal neutron detection capable to outperform 3 He-based detectors in terms of spatial resolution and timing. However, as for the other types of gaseous detectors with a single layer of 10 B 4 C at normal beam incidence, the detection efficiency to thermal neutrons of a single-gap 10 B-RPC is only about 6%. Aiming to overcome this limitation, we introduce a multi-layer 10 B-RPCs detector with a stack of ten double-gap hybrid RPCs. A description of the detector design and the results of its characterization performed at the TREFF neutron beamline at the FRM II neutron facility are presented. The results demonstrate that the detection efficiency exceeds 60% for neutrons with a wavelength of 4.7 Å and the spatial resolution (FWHM) is about 0.25 mm and 0.35 mm in the X and Y direction, respectively.

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Section: Introductionmentioning

confidence: 99%

Multilayer ¹⁰B-RPC neutron imaging detector

et al. 2020

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“…Previously we have reported a counting rate density limit of about 1 kHz/cm 2 for a single gap 10 B-RPC [4]: above this value, the RPC counting rate does not scale linearly with the neutron flux.…”

Section: Counting Rate Capabilitymentioning

confidence: 81%

“…Operation of a single-gap 10 B-RPC detector prototype with counting rate densities up to 1 kHz/cm 2 without loss of efficiency has been reported in our previous study [4]. One of the approaches foreseen to improve the counting rate capability of the detector is to increase the number of RPCs [1] distributing the detection of neutrons impinging the detector in the same area over multiple RPCs.…”

Section: Introductionmentioning

confidence: 85%

Simulation-based optimization of a multilayer ¹⁰B-RPC thermal neutron detector

2020

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A Monte Carlo simulation-based optimization of a multilayer 10 B-RPC thermal neutron detector is performed targeting an increase in the counting rate capability while maintaining high (>50%) detection efficiency for thermal neutrons. The converter layer thicknesses of individual RPCs are optimized for several configurations of a detector containing a stack of 10 double gap RPCs. The results suggest that it is possible to reach a counting rate which is by a factor of eight higher in comparison to the rate of a detector with only one double-gap RPC. The effect of neutron scattering inside the detector contributing to the background is analyzed and design modifications of the first detector prototype, tested at neutron beam, are suggested.

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“…It is important to note that, except in special configurations (e.g., Blanco et al., 2015; Margato et al., 2019), RPC detectors have intrinsically a very low detection efficiency for neutrons below 10 MeV, not exceeding 0.1%. Moreover, neither the products from neutron interactions nor electrons from neutron decay at these energies can traverse a second detection plane, as required in present analysis.…”

Section: The Cosmic Ray Detectormentioning

confidence: 99%

Atmospheric Temperature Effect in Secondary Cosmic Rays Observed With a 2 m² Ground‐Based tRPC Detector

Riádigos

García-Castro

González-Díaz

et al. 2020

Earth and Space Science

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A high time resolution 2 m 2 tracking detector, based on timing Resistive Plate Chamber (tRPC) cells, has been installed at the Faculty of Physics of the University of Santiago de Compostela (Spain) in order to improve our understanding of the cosmic rays arriving at the Earth's surface. Following a short commissioning of the detector, a study of the atmospheric temperature effect of the secondary cosmic ray component was carried out. To take into account this effect, temperature coefficients, W T (h), were obtained from cosmic ray data using a method based on Principal Component Analysis (PCA). The results obtained show good agreement with the theoretical expectation. The method successfully removes the correlation present between the different atmospheric layers, which would be dominant otherwise. We briefly describe the initial calibration and pressure correction procedures, essential to isolate the temperature effect. Overall, the measured cosmic ray rate displays the expected anticorrelation with the effective atmospheric temperature, through the coefficient α T = −0.279±0.051%/K. Rates follow the seasonal variations, and unusual short-term events are clearly identified too.

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Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: Feasibility study in a thermal neutron beam

Cited by 13 publications

References 31 publications

Multilayer ¹⁰B-RPC neutron imaging detector

Multilayer ¹⁰B-RPC neutron imaging detector

Simulation-based optimization of a multilayer ¹⁰B-RPC thermal neutron detector

Atmospheric Temperature Effect in Secondary Cosmic Rays Observed With a 2 m² Ground‐Based tRPC Detector

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Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: Feasibility study in a thermal neutron beam

Cited by 13 publications

References 31 publications

Multilayer 10B-RPC neutron imaging detector

Multilayer 10B-RPC neutron imaging detector

Simulation-based optimization of a multilayer 10B-RPC thermal neutron detector

Atmospheric Temperature Effect in Secondary Cosmic Rays Observed With a 2 m2 Ground‐Based tRPC Detector

Contact Info

Product

Resources

About

Multilayer ¹⁰B-RPC neutron imaging detector

Multilayer ¹⁰B-RPC neutron imaging detector

Simulation-based optimization of a multilayer ¹⁰B-RPC thermal neutron detector

Atmospheric Temperature Effect in Secondary Cosmic Rays Observed With a 2 m² Ground‐Based tRPC Detector