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21 results on '"Babiano, V."'

1. Machine Learning aided 3D-position reconstruction in large LaCl$_{3}$ crystals

Author

Balibrea-Correa, J., Lerendegui-Marco, J., Babiano, V., Caballero, L., Calvo, D., Ladarescu, I., Olleros-Rodriguez, P., and Domingo-Pardo, C.

Subjects
Physics - Instrumentation and Detectors
Abstract

We investigate five different models to reconstruct the 3D $\gamma$-ray hit coordinates in five large \lacls monolithic crystals optically coupled to pixelated silicon photomultipliers. These scintillators have a base surface of 50 $\times$ 50 mm$^2$ and five different thicknesses, from 10 mm to 30 mm. Four of these models are analytical prescriptions and one is based on a Convolutional Neural Network. Average resolutions close to 1-2mm fwhm are obtained in the transverse crystal plane for crystal thicknesses between 10 mm and 20 mm using analytical models. For thicker crystals average resolutions of about 3-5~mm fwhm are obtained. Depth of interaction resolutions between 1mm and 4 mm are achieved depending on the distance of the interaction point to the photosensor surface. We propose a Machine Learning algorithm to correct for linearity distortions and pin-cushion effects. The latter allows one to keep a large field of view of about 70-80\% of the crystal surface, regardless of crystal thickness. This work is aimed at optimizing the performance of the so-called Total Energy Detector with Compton imaging capability (i-TED) for time-of-flight neutron capture cross-section measurements.

Published
2020
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2. First i-TED demonstrator: a Compton imager with Dynamic Electronic Collimation

Author

Babiano, V., Balibrea, J., Caballero, L., Calvo, D., Ladarescu, I., Lerendegui, J., Prats, S. Mira, and Domingo-Pardo, C.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

i-TED consists of both a total energy detector and a Compton camera primarily intended for the measurement of neutron capture cross sections by means of the simultaneous combination of neutron time-of-flight (TOF) and $\gamma$-ray imaging techniques. TOF allows one to obtain a neutron-energy differential capture yield, whereas the imaging capability is intended for the discrimination of radiative background sources, that have a spatial origin different from that of the capture sample under investigation. A distinctive feature of i-TED is the embedded Dynamic Electronic Collimation (DEC) concept, which allows for a trade-off between efficiency and image resolution. Here we report on some general design considerations and first performance characterization measurements made with an i-TED demonstrator in order to explore its $\gamma$-ray detection and imaging capabilities., Comment: Article published in Nuclear Inst. and Methods in Physics Research, A, Volume 953, article id. 163228 Elsevier / DOI: 10.1016/j.nima.2019.163228 / CC-BY-NC-ND

Published
2019
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3. On the performance of large monolithic LaCl3(Ce) crystals coupled to pixelated silicon photosensors

Author

Olleros, P., Caballero, L., Domingo-Pardo, C., Babiano, V., Ladarescu, I., Calvo, D., Gramage, P., Nacher, E., Tain, J. L., and Tolosa, A.

Subjects
Physics - Instrumentation and Detectors
Abstract

We investigate the performance of large area radiation detectors, with high energy- and spatial-resolution, intended for the development of a Total Energy Detector with gamma-ray imaging capability, so-called i-TED. This new development aims for an enhancement in detection sensitivity in time-of-flight neutron capture measurements, versus the commonly used C6D6 liquid scintillation total-energy detectors. In this work, we study in detail the impact of the readout photosensor on the energy response of large area (5050 mm2) monolithic LaCl3(Ce) crystals, in particular when replacing a conventional mono-cathode photomultiplier tube by an 88 pixelated silicon photomultiplier. Using the largest commercially available monolithic SiPM array (25 cm2), with a pixel size of 66 mm2, we have measured an average energy resolution of 3.92% FWHM at 662 keV for crystal thicknesses of 10, 20 and 30 mm. The results are confronted with detailed Monte Carlo (MC) calculations, where both optical processes and properties have been included for the reliable tracking of the scintillation photons. After the experimental validation of the MC model, se use our MC code to explore the impact of different a photosensor segmentation (pixel size and granularity) on the energy resolution. Our optical MC simulations predict only a marginal deterioration of the spectroscopic performance for pixels of 33 mm2.

Published
2018
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5. Device for the simultaneous detection, identification, quantification and/or localization of gamma radiation and neutron sources

Author

Lerendegui-Marco, J., Balibrea, Javier, Domingo Pardo, César, Caballero Ontanaya, Luis, Babiano, V., Ladarescu, I., Lerendegui-Marco, J., Balibrea, Javier, Domingo Pardo, César, Caballero Ontanaya, Luis, Babiano, V., and Ladarescu, I.

Abstract

The invention comprises a mechanical collimator (1) receiving particles from a gamma radiation emission source (61) and/or neutron emission source (62), a material that absorbs neutrons and is virtually transparent to gamma radiation; a first detector (2) comprising a scintillator crystal with neutron-gamma discrimination capability and a position-sensitive photosensor, coupled to the mechanical collimator (1); one or more detector blocks with scintillator crystals of gamma or neutron-gamma radiation (3) and position-sensitive photosensors, after the first detector (2), on a face opposite the mechanical collimator (1); and a processing and acquisition module (4) connected to the detectors (2, 3), with the device being suitable for use in inspections relating to nuclear safety, port safety, nuclear threats and accidents, and hadron-therapy treatments and nuclear medicine.

Published
2023

6. Setup for the measurement of the 235U(n, f) cross section relative to n-p scattering up to 1 GeV

Author

Manna A., Aberle O., Alcayne V, Amaducci S., Andrzejewski J., Audouin L., Babiano V-Suarez, Bacak M., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A. S., Busso M., Caamaño M., Caballero L., Calviani M., Calvi Fño, Cano-Ott D, Casanovas A., Cerutti F., Chiaveri E., Colonna N., Cortés G. P., Cortés-Giraldo M. A., Coséntino L., Cristallo S., Damone L. A., Davies P. J., Diakaki M., Dietz M., Domingo-Pardo C, Dressler R., Ducasse Q., Dupont E., Durán I., Eleme Z., Fernández-Domíngez B., Ferrari A., Ferro-Goncalves I, Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Göbel K., González-Romero E., Guerrero C., Gunsing F, Heinitz S., Heyse J., Jenkins D. G., Jericha E., Jiri U., Junghans A., Kadi Y, Käppeler F, Kimura A., Knapová I., Kokkoris M., Kopatch Y., Krtiička M., Kurtulgil D., Ladarescu I., Lederer-Woods C, Lerendegui-Marco J, Lonsdale S.-J., Macina D., Martínez T, Masi A., Massimi C., Mastinu P. F, Mastromarco M., Maugeri E., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V, Milazzo P. M., Millán-Callado M. A., Mingrone F, Moreno-Soto J, Musumarra A., Negret A., Nolte R., Ogállar F, Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Quesada J.M., Ramos D., Reifarth R., Rochman D., Rubbia C., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tain J. L., Tarifeno-Saldivia A. E., Tassan-Got L, Thomas B., Torres-Sánchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V, Vlastou R., Wallner A., Woods P. J., Wright T J., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The neutron induced fission of 235U is extensively used as a reference for neutron fluence measurements in various applications, ranging from the investigation of the biological effectiveness of high energy neutrons, to the measurement of high energy neutron cross sections of relevance for accelerator driven nuclear systems. Despite its widespread use, no data exist on neutron induced fission of 235U above 200 MeV. The neutron facility n_TOF offers the possibility to improve the situation. The measurement of 235U(n,f) relative to the differential n-p scattering cross-section, was carried out in September 2018 with the aim of providing accurate and precise cross section data in the energy range from 10 MeV up to 1 GeV. In such measurements, Recoil Proton Telescopes (RPTs) are used to measure the neutron flux while the fission events are detected and counted with dedicated detectors. In this paper the measurement campaign and the experimental set-up are illustrated.

Published
2020
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7. A first prototype of C[formula omitted]D[formula omitted] total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Author

Balibrea-Correa, J., Lerendegui-Marco, J., Calvo, D., Caballero, L., Babiano, V., Ladarescu, I., Redondo, M. Lopez, Tain, J.L., Tolosa, A., Domingo-Pardo, C., Calvino, F., Casanovas, A., Tarifeño-Saldivia, A., Alcayne, V., Cano-Ott, D., Martinez, T., Guerrero, C., Barbagallo, M., Macina, D., and Bacak, M.

Published
2021
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8. A first prototype of C$_6$ D$_6$ total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Author

Balibrea-Correa, J, Lerendegui-Marco, J, Calvo, D, Caballero, L, Babiano, V, Ladarescu, I, Redondo, M Lopez, Tain, J L, Tolosa, A, Domingo-Pardo, C, Calvino, F, Casanovas, A, Tarifeño-Saldivia, A, Alcayne, V, Cano-Ott, D, Martinez, T, Guerrero, C, Barbagallo, M, Macina, D, and Bacak, M

Subjects
Physics::Instrumentation and Detectors, Detectors and Experimental Techniques
Abstract

Low efficiency total-energy detectors (TEDs) are one of the main tools for neutron capture cross section measurements utilizing the time-of-flight (TOF) technique. State-of-the-art TEDs are based on a C$_6$ D$_6$ liquid-scintillation cell optically coupled to a fast photomultiplier tube. The large photomultiplier tube represents yet a significant contribution to the so-called neutron sensitivity background, which is one of the most conspicuous sources of uncertainty in this type of experiments. Here we report on the development of a first prototype of a TED based on a silicon-photomultiplier (SiPM) readout, thus resulting in a lightweight and much more compact detector. Apart from the envisaged improvement in neutron sensitivity, the new system uses low voltage (+28 V) and low current supply ( ∼ 50 mA), which is more practical than the ∼ kV supply required by conventional photomultipliers. One important difficulty hindering the earlier implementation of SiPM readout for this type of detector was the large capacitance for the output signal when all pixels of a SiPM array are summed together. The latter leads to long pulse rise and decay times, which are not suitable for time-of-flight experiments. In this work we demonstrate the feasibility of a Schottky-diode multiplexing readout approach, that allows one to preserve the excellent timing properties of SiPMs, hereby paving the way for their implementation in future neutron TOF experiments.

Published
2021

9. A first prototype of CD total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Author

Balibrea Correa, J., Lerendegui Marco, Jorge, Calvo, D., Caballero, L., Babiano, V., Ladarescu, I., López Redondo, M., Tain, J. L., Guerrero Sánchez, Carlos, Bacak, M., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Union (UE). H2020, Ministerio de Ciencia e Innovación (MICIN). España, and Consejo Superior de Investigaciones Científicas (CSIC)

Subjects
Time-of-flight, Radiative capture, Total energy detector, Silicon photomultiplier, Pulse-height weighting technique, Radiation detectors
Abstract

Low efficiency total-energy detectors (TEDs) are one of the main tools for neutron capture cross section measurements utilizing the time-of-flight (TOF) technique. State-of-the-art TEDs are based on a CD liquid-scintillation cell optically coupled to a fast photomultiplier tube. The large photomultiplier tube represents yet a significant contribution to the so-called neutron sensitivity background, which is one of the most conspicuous sources of uncertainty in this type of experiments. Here we report on the development of a first prototype of a TED based on a silicon-photomultiplier (SiPM) readout, thus resulting in a lightweight and much more compact detector. Apart from the envisaged improvement in neutron sensitivity, the new system uses low voltage (+28 V) and low current supply (50 mA), which is more practical than the kV supply required by conventional photomultipliers. One important difficulty hindering the earlier implementation of SiPM readout for this type of detector was the large capacitance for the output signal when all pixels of a SiPM array are summed together. The latter leads to long pulse rise and decay times, which are not suitable for time-of-flight experiments. In this work we demonstrate the feasibility of a Schottky-diode multiplexing readout approach, that allows one to preserve the excellent timing properties of SiPMs, hereby paving the way for their implementation in future neutron TOF experiments. European Union’s Horizon 2020 681740 Ministerio de Ciencia e Innovación FPA2014-52823-C2-1-P y FPA2017-83946-C2-1-P CSIC PIE-201750I26 and SEV-2014-0398

Published
2021

10. A first prototype of CD total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Author

Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Union (UE). H2020, Ministerio de Ciencia e Innovación (MICIN). España, Consejo Superior de Investigaciones Científicas (CSIC), Balibrea Correa, J., Lerendegui Marco, Jorge, Calvo, D., Caballero, L., Babiano, V., Ladarescu, I., López Redondo, M., Tain, J. L., Guerrero Sánchez, Carlos, Bacak, M., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Union (UE). H2020, Ministerio de Ciencia e Innovación (MICIN). España, Consejo Superior de Investigaciones Científicas (CSIC), Balibrea Correa, J., Lerendegui Marco, Jorge, Calvo, D., Caballero, L., Babiano, V., Ladarescu, I., López Redondo, M., Tain, J. L., Guerrero Sánchez, Carlos, and Bacak, M.

Abstract

Low efficiency total-energy detectors (TEDs) are one of the main tools for neutron capture cross section measurements utilizing the time-of-flight (TOF) technique. State-of-the-art TEDs are based on a CD liquid-scintillation cell optically coupled to a fast photomultiplier tube. The large photomultiplier tube represents yet a significant contribution to the so-called neutron sensitivity background, which is one of the most conspicuous sources of uncertainty in this type of experiments. Here we report on the development of a first prototype of a TED based on a silicon-photomultiplier (SiPM) readout, thus resulting in a lightweight and much more compact detector. Apart from the envisaged improvement in neutron sensitivity, the new system uses low voltage (+28 V) and low current supply (50 mA), which is more practical than the kV supply required by conventional photomultipliers. One important difficulty hindering the earlier implementation of SiPM readout for this type of detector was the large capacitance for the output signal when all pixels of a SiPM array are summed together. The latter leads to long pulse rise and decay times, which are not suitable for time-of-flight experiments. In this work we demonstrate the feasibility of a Schottky-diode multiplexing readout approach, that allows one to preserve the excellent timing properties of SiPMs, hereby paving the way for their implementation in future neutron TOF experiments.

Published
2021

11. Dispositivo de detección, identificación, cuantificación y/o localización simultánea de fuentes de radiación gamma y de neutrones

Author

Lerendegui-Marco, J., Balibrea, Javier, Domingo Pardo, César, Caballero Ontanaya, Luis, Babiano, V., Ladarescu, I., Lerendegui-Marco, J., Balibrea, Javier, Domingo Pardo, César, Caballero Ontanaya, Luis, Babiano, V., and Ladarescu, I.

Abstract

Dispositivo de detección, identificación, cuantificación y/o localización simultánea de fuentes de radiación gamma y de neutrones. Que comprende un colimador mecánico (1) que recibe partículas de una fuente emisora de radiación gamma (61) y/o de neutrones (62), un material absorbente de neutrones y prácticamente transparente a la radiación gamma; un primer detector (2) que comprende un cristal centelleador con capacidad de discriminación neutrón-gamma y un fotosensor sensible a las posiciones, acoplado al colimador mecánico (1); uno o más bloques detectores con cristales centelleadores de radiación gamma o neutrón-gamma (3) y fotosensores sensibles a las posiciones, a continuación del primer detector (2), en una cara opuesta al colimador mecánico (1); y un módulo de adquisición y procesado (4), conectado a los detectores (2, 3), siendo el dispositivo apto para utilizar en inspecciones de seguridad nuclear, seguridad portuaria, amenazas y accidentes nucleares y tratamientos de hadrón-terapia y medicina nuclear.

Published
2021

12. Dispositivo de detección, identificación, cuantificación y/o localización simultánea de fuentes de radiación gamma y de neutrones

Author

Lerendegui-Marco, J., Balibrea, J., Domingo Pardo, César, Caballero Ontanaya, Luis, Babiano, V., and Ladarescu, I.

Abstract

Dispositivo de detección, identificación, cuantificación y/o localización simultánea de fuentes de radiación gamma y de neutrones. Que comprende un colimador mecánico (1) que recibe partículas de una fuente emisora de radiación gamma (61) y/o de neutrones (62), un material absorbente de neutrones y prácticamente transparente a la radiación gamma; un primer detector (2) que comprende un cristal centelleador con capacidad de discriminación neutrón-gamma y un fotosensor sensible a las posiciones, acoplado al colimador mecánico (1); uno o más bloques detectores con cristales centelleadores de radiación gamma o neutrón-gamma (3) y fotosensores sensibles a las posiciones, a continuación del primer detector (2), en una cara opuesta al colimador mecánico (1); y un módulo de adquisición y procesado (4), conectado a los detectores (2, 3), siendo el dispositivo apto para utilizar en inspecciones de seguridad nuclear, seguridad portuaria, amenazas y accidentes nucleares y tratamientos de hadrón-terapia y medicina nuclear., Consejo Superior de Investigaciones Científicas (CSIC), Universitat de València, A1 Solicitud de patente con informe sobre el estado de la técnica

Published
2020

13. A first prototype of C6D6 total-energy detector with SiPM readout for neutron capture time-of-flight experiments

Author

Balibrea-Correa, J., primary, Lerendegui-Marco, J., additional, Calvo, D., additional, Caballero, L., additional, Babiano, V., additional, Ladarescu, I., additional, Redondo, M. Lopez, additional, Tain, J.L., additional, Tolosa, A., additional, Domingo-Pardo, C., additional, Calvino, F., additional, Casanovas, A., additional, Tarifeño-Saldivia, A., additional, Alcayne, V., additional, Cano-Ott, D., additional, Martinez, T., additional, Guerrero, C., additional, Barbagallo, M., additional, Macina, D., additional, and Bacak, M., additional

Published
2021
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14. Gamma-ray position reconstruction in large lanthanum-halide crystals with SiPM readout: Analytical vs. neural-network algorithms

Author

Ladarescu I., Babiano V., Balibrea J., Caballero L., Calvo D., Domingo-Pardo C., Lerendegui J., Olleros P. and Manuscript received on December 12, 2019. This work was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovative programme (ERC Consolidator Grant Project HYMNS, grant agreement 681740). The authors acknowledge partial support from the Spanish MICINN grants FPA2017-83946-C2-1-P and FPA2014-52823-C2-1-P and the program Severo Ochoa (SEV-2014-0398)..

Published
2019

16. gamma-Ray position reconstruction in large monolithic LaCl3(Ce) crystals with SiPM readout

Author

Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Babiano, V., Caballero Ontanaya, Luis, Calvo, D., Ladarescu, I., Olleros, P., Domingo Pardo, César, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Babiano, V., Caballero Ontanaya, Luis, Calvo, D., Ladarescu, I., Olleros, P., and Domingo Pardo, César

Abstract

We report on the spatial response characterization of large LaCl3(Ce) monolithic crystals optically coupled to 8 x 8 pixel silicon photomultiplier (SiPM) sensors. A systematic study has been carried out for 511 keV gamma-rays using three different crystal thicknesses of 10 mm, 20 mm and 30 mm, all of them with planar geometry and a base size of 50 x 50 mm(2). In this work we investigate and compare two different approaches for the determination of the main gamma-ray hit location. On one hand, methods based on the fit of an analytical model for the scintillation light distribution provide the best results in terms of linearity and field of view, with spatial resolutions close to similar to 1 mm FWHM. On the other hand, position reconstruction techniques based on neural networks provide similar linearity and field-of-view, becoming the attainable spatial resolution similar to 3 mm FWHM. For the third space coordinate z or depth-of-interaction we have implemented an inverse linear calibration approach based on the cross-section of the measured scintillation-light distribution at a certain height. The detectors characterized in this work are intended for the development of so-called Total Energy Detectors with Compton imaging capability (i-TED), aimed at enhanced sensitivity and selectivity measurements of neutron capture cross sections via the time-of-flight (TOF) technique.

Published
2019

17. On the performance of large monolithic LaCl3(Ce) crystals coupled to pixelated silicon photosensors

Author

Olleros P., Caballero L., Domingo-Pardo C., Babiano V., Ladarescu I., Calvo D., Gramage P., Nacher E., Tain J.L., Tolosa A. and This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 681740). We acknowledge support from the Spanish project FPA2014-52823-C2-1-P. We acknowledge support from IFIC’s Electronics Workshop, in particular the help of M. Lopez, as well as the help of J. M. Monserrate at the Mechanics Workshop of IFIC. We are grateful to A. González and L. Hernández from I3M at UPV for helpful discussions.

Published
2018

21. [formula omitted]-Ray position reconstruction in large monolithic LaCl3(Ce) crystals with SiPM readout.

Author

Babiano, V., Caballero, L., Calvo, D., Ladarescu, I., Olleros, P., and Domingo-Pardo, C.

Subjects
*PHOTOMULTIPLIERS, *NEUTRON capture, *CRYSTALS, *NEUTRON measurement, *ARTIFICIAL neural networks, *IMAGE converters
Abstract

We report on the spatial response characterization of large LaCl 3 (Ce) monolithic crystals optically coupled to 8 × 8 pixel silicon photomultiplier (SiPM) sensors. A systematic study has been carried out for 511 keV γ -rays using three different crystal thicknesses of 10 mm, 20 mm and 30 mm, all of them with planar geometry and a base size of 50 × 50 mm 2. In this work we investigate and compare two different approaches for the determination of the main γ -ray hit location. On one hand, methods based on the fit of an analytical model for the scintillation light distribution provide the best results in terms of linearity and field of view, with spatial resolutions close to ∼ 1 mm fwhm. On the other hand, position reconstruction techniques based on neural networks provide similar linearity and field-of-view, becoming the attainable spatial resolution ∼ 3 mm fwhm. For the third space coordinate z or depth-of-interaction we have implemented an inverse linear calibration approach based on the cross-section of the measured scintillation-light distribution at a certain height. The detectors characterized in this work are intended for the development of so-called Total Energy Detectors with Compton imaging capability (i-TED), aimed at enhanced sensitivity and selectivity measurements of neutron capture cross sections via the time-of-flight (TOF) technique. [ABSTRACT FROM AUTHOR]

Published
2019
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