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14 results on '"Minniti, T."'

1. Energy-resolved neutron tomography of an unconventional cultured pearl at a pulsed spallation source using a microchannel plate camera

Author

Giuseppe Gorini, D. Micieli, D. Di Martino, L. Gori, Triestino Minniti, G. Vitucci, Winfried Kockelmann, Kenichi Watanabe, Anton S. Tremsin, Maya Musa, Vitucci, G, Minniti, T, Di Martino, D, Musa, M, Gori, L, Micieli, D, Kockelmann, W, Watanabe, K, Tremsin, A, and Gorini, G

Subjects
Materials science, Physics::Instrumentation and Detectors, 02 engineering and technology, Iterative reconstruction, 01 natural sciences, Analytical Chemistry, Cultured pearl, Optics, Neutron phase mapping, 0103 physical sciences, Neutron, Image resolution, Spectroscopy, Tomographic reconstruction, 010308 nuclear & particles physics, business.industry, Detector, Neutron tomography, Microchannel plate, 021001 nanoscience & nanotechnology, Neutron imaging detector, Beamline, Microchannel plate detector, Energy resolved imaging, 0210 nano-technology, business
Abstract

A non-destructive neutron analysis technique performed at the IMAT beamline of the STFC (Science and Technology Facility Council), UK, is presented. In this experiment, neutrons of different energy have been exploited to obtain a tomographic reconstruction of a biomineralic sample, more specifically a cultured pearl, by using a time-resolving pixel camera, the MicroChannel Plate (MCP) detector, utilizing an array of 2 × 2 Timepix readout chips. The MCP camera is capable of energy-resolved two-dimensional mapping of neutron transmission with a spatial resolution of ~ 55 μm. By using a Simultaneous Iterative Reconstruction Technique (SIRT), virtual sections of the internal part of the sample have been created, thus revealing several features inside its bulk. The crystallographic phase map via Bragg edge analysis, showing a phase fraction distribution on the entire specimen, has been generated as well. Finally, 3D volume rendering of the pearl is presented.

Published
2018
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2. Investigation of image distortion due to MCP electronic readout misalignment and correction via customized GUI application

Author

Giuseppe Gorini, Triestino Minniti, Winfried Kockelmann, G. Vitucci, Anton S. Tremsin, Vitucci, G, Minniti, T, Tremsin, A, Kockelmann, W, and Gorini, G

Subjects
Physics, Pixel, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Neutron imaging, Detector, 02 engineering and technology, Chip, 01 natural sciences, 020210 optoelectronics & photonics, Optics, Beamline, Pattern recognition, cluster finding, calibration and fitting method, Distortion, 0103 physical sciences, Data processingmethod, 0202 electrical engineering, electronic engineering, information engineering, business, Analysis and statistical method, Image resolution, Instrumentation, Spallation Neutron Source, Mathematical Physics
Abstract

The MCP-based neutron counting detector is a novel device that allows high spatial resolution and time-resolved neutron radiography and tomography with epithermal, thermal and cold neutrons. Time resolution is possible by the high readout speeds of ~ 1200 frames/sec, allowing high resolution event counting with relatively high rates without spatial resolution degradation due to event overlaps. The electronic readout is based on a Timepix sensor, a CMOS pixel readout chip developed at CERN. Currently, a geometry of a quad Timepix detector is used with an active format of 28 × 28 mm2 limited by the size of the Timepix quad (2 × 2 chips) readout. Measurements of a set of high-precision micrometers test samples have been performed at the Imaging and Materials Science & Engineering (IMAT) beamline operating at the ISIS spallation neutron source (U.K.). The aim of these experiments was the full characterization of the chip misalignment and of the gaps between each pad in the quad Timepix sensor. Such misalignment causes distortions of the recorded shape of the sample analyzed. We present in this work a post-processing image procedure that considers and corrects these effects. Results of the correction will be discussed and the efficacy of this method evaluated.

Published
2018

3. A neutron study of sealed pottery from the grave-goods of Kha and Merit

Author

C. Andreani, beg F. Aliotta, b L. Arcidiacono, e M. Borla, f D. Di Martino, h F. Facchetti, d E. Ferraris, d G. Festa, e G. Gorini, h W. Kockelmann, j J. Kelleher, j D. Malfitana, a D. Micieli, i T. Minniti, j E. Perelli Cippo, c R. Ponterio, b G. Salvato, b R. Senesi, beg V. Turina, d C. Vasi, b, C. Greco, d, Andreani, C, Aliotta, F, Arcidiacono, L, Borla, M, Di Martino, D, Facchetti, F, Ferraris, E, Festa, G, Gorini, G, Kockelmann, W, Kelleher, J, Malfitana, D, Micieli, D, Minniti, T, Cippo, E, Ponterio, R, Salvato, G, Senesi, R, Turina, V, Vasi, C, and Greco, C

Subjects
0301 basic medicine, Elemental composition, Grave goods, 010308 nuclear & particles physics, media_common.quotation_subject, Neutron tomography, Metallurgy, pottery, Art, engineering.material, 01 natural sciences, Archaeology, Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin), Analytical Chemistry, 03 medical and health sciences, Alabaster, neutron, 030104 developmental biology, 0103 physical sciences, engineering, Neutron, Pottery, Treasure, Spectroscopy, media_common
Abstract

This work presents the first neutron characterization of artefacts from the grave-goods of Kha and Merit, a unique cultural treasure of mankind and preserved at the Museo Egizio in Turin. This magnificent collection, discovered in the early years of the last century, includes an impressive amount of artefacts such as coffins, textiles, metallic and ceramic pottery, and alabaster containers. The present study investigates two sealed potteries, using enhanced Neutron Tomography, Radiography, and Prompt Gamma Activation Analysis techniques. The neutron probe provides access to the morphological reconstructions of the inner parts of the vases and to map, with unprecedented details, the elemental composition of the surfaces and bulk areas of the potteries. The present work extends the knowledge to hitherto unknown contents of the sealed vases unlocking their secrets.

Published
2017
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4. The symmetry energy at suprasaturation density and the ASY-EOS experiment at GSI

Author

S. Santoro, P. Lasko, Luis Acosta, D. G. Sarantites, S. Al-Homaidhi, K. Boretzky, Giuseppe Verde, F. Porto, S. Pirrone, Z. Chajecki, E. V. Pagano, D. M. Rossi, Zbigniew Sosin, Qingfeng Li, A. Wieloch, Sherry Yennello, F. Rizzo, L. Stuhl, M. B. Tsang, L. Zetta, Roy Crawford Lemmon, S. Kupny, Maria Colonna, M. Kiš, Martin Veselsky, P. Zambon, C. Caesar, F. Riccio, P. Cammarata, Yvonne Leifels, I. Skwirczyńska, J. Benlliure, Marina Trimarchi, Chiara Guazzoni, Mariano Vigilante, A. Trifirò, P. Russotto, Z. Basrak, A. Chbihi, L. W. May, W. Trautmann, M. Di Toro, Piotr Pawłowski, B. Czech, E. La Guidara, M.D. Cozma, W. Reviol, A. Pagano, P. Guazzoni, H. H. Wolter, Michael Famiano, J. Brzychczyk, E. De Filippo, M. Al-Garawi, G. Cardella, G. Lanzalone, Z. Matthews, Igor Gašparić, Jack Winkelbauer, W. G. Lynch, A. Budzanowski, N. Kurz, L. Grassi, M. Mostazo, A. Le Fèvre, Elio Rosato, Paola Marini, M. Zoric, Thomas Aumann, A. Krasznahorkay, Herbert A. Simon, Riccardo Introzzi, Yongjia Wang, P. Wigg, K. Kezzar, Abdulrahman Alajlan, J. Łukasik, P. Z. Wu, Yassid Ayyad, Triestino Minniti, Ivano Lombardo, Lucrezia Auditore, G. Politi, M. Boisjoli, F. Amorini, Marielle Chartier, Lauren Heilborn, Tadaaki Isobe, Matthias Heil, Michele Papa, M. Adamczyk, S. Gannon, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), De Filippo, E., Russotto, P., Acosta, L., Adamczyk, M., Al-Ajlan, A., Al-Garawi, M., Al-Homaidhi, S., Amorini, F., Auditore, L., Aumann, T., Ayyad, Y., Basrak, Z., Benlliure, J., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Caesar, C., Cardella, G., Cammarata, P., Chajecki, Z., Chartier, M., Chbihi, A., Colonna, M., Cozma, M. D., Czech, B., Di Toro, M., Famiano, M., Gannon, S., Gašparić, I., Grassi, L., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Kiš, M., Krasznahorkay, A., Kupny, S., Kurz, N., La Guidara, E., Lanzalone, G., Lasko, P., Le Fèvre, A., Leifels, Y., Lemmon, R. C., Li, Q. F., Lombardo, I., Łukasik, J., Lynch, W. G., Marini, P., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Pagano, E. V., Papa, M., Pawłowski, P., Pirrone, S., Politi, G., Porto, F., Reviol, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Sarantites, D. G., Simon, H., Skwirczynska, I., Sosin, Z., Stuhl, L., Trautmann, W., Trifirò, A., Trimarchi, M., Tsang, M. B., Verde, G., Veselsky, M., Vigilante, M., Wang, Yongjia, Wieloch, A., Wigg, P., Winkelbauer, J., Wolter, H. H., Wu, P., Yennello, S., Zambon, P., Zetta, L., and Zoric, M.

Subjects
energy: symmetry, QC1-999, Hadron, Nuclear Theory, Elementary particle, Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), 0103 physical sciences, Neutron, ddc:530, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Elliptic flow, gold, charged particle, Charged particle, Symmetry (physics), Darmstadt Lab, n: elliptic flow, nucleus: equation of state, density dependence, density, Baryon, Nucleon, light nucleus, saturation: density, experimental results
Abstract

International audience; The ASY-EOS experiment at GSI laboratory measured the direct and elliptic flow of neutrons and light charged particles in the reaction 197Au+197 Au at 400 A MeV incident energy. The ratio of elliptic flow of neutrons with respect to that of the light charged particles was used as main experimental observable to probe the density dependence of the symmetry energy term of the nuclear equation of state. Results, obtained by comparison of the experimental data with the UrQMD model predictions, strongly support a moderately soft to linear density dependence of the symmetry energy at suprasaturation densities below 2ρ0.

Published
2016
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5. Campaign of measurements to probe the good performance of the new array FARCOS for spectroscopy and correlations

Author

Acosta, 1., Andolina, L, Auditore, R, Boiano, L, Cardella, C, Castoldi, G, D'Andrea, A, M, Filippo, De, E, Luca, De, Dell'Aquila, S, Francalanza, D, Gnoffo, L, Guazzoni, B, Lanzalone, C, Lombardo, G, Martorana, I, Minniti, N, Norella, T, Pagano, S, Pagano, A, Papa, Ev, Parsani, M, Pirrone, T, Politi, S, Porto, G, Quattrocchi, F, L, Rizzo, Francesca, Russotto, P, Sacca, G, Trifiro, A, Trimarchi, M, Verde, G, Vigilante, M, Zambon, P., Acosta, L., Andolina, R., Auditore, L., Boiano, C., Cardella, G., Castoldi, A., D'Andrea, M., De Filippo, E., De Luca, S., Dell'Aquila, D., Francalanza, L., Gnoffo, B., Guazzoni, C., Lanzalone, G., Lombardo, I., Martorana, N., Minniti, T., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Parsani, T., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Russotto, P., Saccá, G., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., Zambon, P., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
History, Engineering, sezele, Spectrometer, 010308 nuclear & particles physics, business.industry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics, Present situation, Telescopes, Particle detector, Computer Science Applications, Education, Physics and Astronomy (all), Optics, 0103 physical sciences, Measuring instrument, 010306 general physics, Spectroscopy, business
Abstract

International audience; During the last four years, several measurements have been carried out where the capabilities of FARCOS array were tested. In some of this occasions, FARCOS was coupled to the 4π array CHIMERA, permanently placed at INFN-Laboratori Nazionali del Sud, Catania in order to be tested in real experimental measurements. At the present situation, the FARCOS demonstrator is formed by 4 telescopes out of the originally 20 that will constitute the final array. Here are presented some preliminary results obtained with the new array, probing its qualities and showing the effectiveness of FARCOS telescopes. The initial encouraging results support the construction of the complete array.

Published
2016
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6. Status and perspective of FARCOS: A new correlator array for nuclear reaction studies

Author

Giuseppe Verde, S. Pirrone, G. Lanzalone, G. Cardella, E. De Filippo, Andrea Castoldi, E. V. Pagano, Triestino Minniti, B. Gnoffo, Marina Trimarchi, L. Francalanza, Daniele Dell’Aquila, Lucrezia Auditore, A. Trifirò, C. Boiano, I. Lombardo, Giuseppe Politi, A. Grimaldi, M. D'Andrea, Mariano Vigilante, G. Sacca, F. Porto, Angelo Pagano, F. Fichera, F. Rizzo, Maria Nicolina Papa, Luis Acosta, S. Norella, Chiara Guazzoni, P. Russotto, S. De Luca, L. Quattrocchi, N. Giudice, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Greco, V., Pagano, E. V., Acosta, L., Auditore, L., Boiano, C., Cardella, G., Castoldi, A., D'Andrea, M., Dell'Aquila, D., De Filippo, E., De Luca, S., Fichera, F., Francalanza, L., Giudice, N., Gnoffo, B., Grimaldi, A., Guazzoni, C., Lanzalone, G., Lombardo, I., Minniti, T., Norella, S., Pagano, A., Papa, M., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Russotto, P., Saccá, G., Trifirò, A., Trimarchi, M., Verde, G., and Vigilante, M.

Subjects
Nuclear reaction, QC1-999, Physics::Medical Physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, law.invention, Ion, Nuclear physics, Physics and Astronomy (all), law, 0103 physical sciences, Statistical physics, 010306 general physics, Nuclear Experiment, Physics, sezele, 010308 nuclear & particles physics, Detector, Observable, Charged particle, Photodiode, Energy (signal processing), Nuclear Instrumentation, Fermi Gamma-ray Space Telescope
Abstract

International audience; The experimental investigation of Heavy Ion reactions at Fermi energies requires an accurate measurement of observables, such as linear momentum and energy of the detected particles. In order to address this problem, dedicated and flexible correlator arrays are useful tools to be coupled with 4pi detectors. One of these arrays is FARCOS, presently under construction at the INFN Sezione di Catania and Laboratori Nazionali del Sud (LNS).

Published
2016
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7. The ASY-EOS Experiment at GSI

Author

Z. Basrak, A. Chbihi, Piotr Pawłowski, H. H. Wolter, Giuseppe Verde, Z. Matthews, S. Pirrone, Z. Chajecki, Maria Colonna, M. B. Tsang, J. Łukasik, F. Amorini, F. Rizzo, Abdulrahman Alajlan, Triestino Minniti, P. Cammarata, Marielle Chartier, Chiara Guazzoni, A. Budzanowski, Zbigniew Sosin, Qingfeng Li, L. Grassi, B. Czech, Martin Veselsky, F. Riccio, W. G. Lynch, N. Kurz, Vincenzo Greco, Yvonne Leifels, M. Boisjoli, Attila Krasznahorkay, Sherry Yennello, L. Stuhl, Herbert A. Simon, Mariano Vigilante, W. Trautmann, P. Russotto, S. Al-Homaidhi, W. Reisdorf, F. Porto, A. Wieloch, P. Wigg, E. La Guidara, K. Kezzar, I. Skwirczyńska, L. Zetta, Paola Marini, M. Kiš, M. Zoric, Igor Gašparić, G. Lanzalone, R. Pleskac, Elio Rosato, Angelo Pagano, M. D. Cozma, Lauren Heilborn, L. Acosta, E. De Filippo, Riccardo Introzzi, Roy Crawford Lemmon, S. Gannon, D. Rossi, M. Di Toro, C. Boiano, S. Kupny, G. Cardella, Michele Papa, M. Adamczyk, J. Benlliure, Rene Reifarth, P. Z. Wu, A. Trifirò, Yassid Ayyad, Matthias Heil, Ivano Lombardo, M. Al-Garawi, Tadaaki Isobe, P. Guazzoni, Michael Famiano, M. Trimarchi, R. Bassini, A. Le Fèvre, Thomas Aumann, J. Brzychczyk, Lucrezia Auditore, G. Politi, L. W. May, K. Boretzky, M. Mostazo, S. Santoro, P. Lasko, V. Baran, P. Zambon, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Greco, V., Russotto, P., Chartier, M., Cozma, M. D., De Filippo, E., Le Fèvre, A., Gannon, S., Gašparić, I., Kiš, M., Kupny, S., Leifels, Y., Lemmon, R. C., Li, Q., Aukasik, J., Marini, P., Pawłowski, P., Trautmann, W., Acosta, L., Adamczyk, M., Al-Ajlan, A., Al-Garawi, M., Al-Homaidhi, S., Amorini, F., Auditore, L., Aumann, T., Ayyad, Y., Baran, V., Basrak, Z., Bassini, R., Benlliure, J., Boiano, C., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Cardella, G., Cammarata, P., Chajecki, Z., Chbihi, A., Colonna, M., Czech, B., Di Toro, M., Famiano, M., Grassi, L., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Krasznahorkay, A., Kurz, N., La Guidara, E., Lanzalone, G., Lasko, P., Lombardo, I., Lynch, W. G., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Papa, M., Pirrone, S., Pleskac, R., Politi, G., Porto, F., Reifarth, R., Reisdorf, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Simon, H., Skwirczynska, I., Sosin, Z., Stuhl, L., Trifirò, A., Trimarchi, M., Tsang, M. B., Verde, G., Veselsky, M., Vigilante, M., Wieloch, A., Wigg, P., Wolter, H. H., Wu, P., Yennello, S., Zambon, P., Zetta, L., Zoric, M., Greco, Vincenzo, La Cognata, M., Pirrone, Sara, Rizzo, Francesca, Spitaleri, Claudio, and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
DENSITY-DEPENDENCE, COLLISIONS, heavy ion: scattering, energy: symmetry, QC1-999, Hadron, Nuclear Theory, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Ion, Nuclear physics, Physics and Astronomy (all), quantum molecular dynamics: relativistic, symmetry energy, neutron flow, nuclear equation of state, heavy-ion scattering, relativistic quantum molecular dynamics, Darmstadt GSI FAIR, density dependence, transport theory, elliptic flow, 0.4 GeV/nucleon, 0103 physical sciences, Neutron, 010306 general physics, PROBE, Nuclear Experiment, numerical calculations, DETECTOR, Physics, density, DENSITY-DEPENDENCE, SYMMETRY ENERGY, COLLISIONS, FRAGMENTATION, DETECTOR, NEUTRON, PROBE, sezele, 010308 nuclear & particles physics, Elliptic flow, SYMMETRY ENERGY, charged particle, Charged particle, Baryon, n: flow, NEUTRON, Atomic physics, FRAGMENTATION, Nucleon, nucleus: equation of state
Abstract

International audience; The elliptic-flow ratio of neutrons with respect to protons or light complex particles in reactions of heavy ions at pre-relativistic energies has been proposed as an observable sensitive to the strength of the symmetry term of the nuclear equation of state at supra-saturation densities. In the ASY-EOS experiment at the GSI laboratory, flows of neutrons and light charged particles were measured for ^197Au+^197Au collisions at 400 MeV/nucleon. Flow results obtained for the Au+Au system, in comparison with predictions of the UrQMD transport model, confirm the moderately soft to linear density dependence of the symmetry energy deduced from the earlier FOPI-LAND data.

Published
2016
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8. Materials analysis opportunities on the new neutron imaging facility IMAT@ISIS

Author

Q. Mutamba, Sebastiano Trusso, Federico Montesino Pouzols, D.E. Pooley, Erik Schooneveld, R. Ponterio, Lucio Bonaccorsi, Cirino Vasi, Joe Kelleher, Genoveva Burca, Nigel J. Rhodes, Triestino Minniti, Giuseppe Gorini, Francesco Aliotta, J. Sykora, J.B. Nightingale, Winfried Kockelmann, Saurabh Kabra, G. Salvato, S.Y. Zhang, Anton S. Tremsin, Minniti, T, Kockelmann, W, Burca, G, Kelleher, J, Kabra, S, Zhang, S, Pooley, D, Schooneveld, E, Mutamba, Q, Sykora, J, Rhodes, N, Pouzols, F, Nightingale, J, Aliotta, F, Bonaccorsi, L, Ponterio, R, Salvato, G, Trusso, S, Vasi, C, Tremsin, A, and Gorini, G

Subjects
fast neutrons), medicine.medical_specialty, Physics::Instrumentation and Detectors, Nuclear engineering, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Field of view, 02 engineering and technology, 01 natural sciences, thermal, Neutron diffraction detectors, 0103 physical sciences, medicine, User Facility, Spallation, Neutron, Medical physics, Sample area, Nuclear Experiment, Instrumentation, beam-intensity monitor, Mathematical Physics, Physics, 010308 nuclear & particles physics, Neutron imaging, Neutron diffraction detector, 021001 nanoscience & nanotechnology, Neutron temperature, Imaging spectroscopy, Neutron detectors (cold, Beam-line instrumentation (beam position and profile monitor, bunch length monitors), Beam-line instrumentation (beam position and profile monitors, beam-intensity monitors, Physics::Accelerator Physics, 0210 nano-technology, Neutron detectors (cold, thermal, fast neutrons)
Abstract

A new neutron imaging and diffraction facility, called IMAT, is currently being commissioned at the ISIS pulsed neutron spallation source. IMAT will take advantage of neutron time-of-flight measurement techniques for flexible neutron energy selection and effective energy discrimination. The instrument will be completed and commissioned within the next few months, after neutrons have been recently delivered to the sample area. From 2016 IMAT will enable white-beam neutron radiography and tomography as well as energy-dependent neutron imaging. The facility will offer a spatial resolution down to 50 microns for a field of view of up to 400 cm(2). IMAT will be operated as a user facility for material science applications and will be open for developments of time-of-flight imaging methods.

Published
2016
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9. Characterization of the high-energy neutron beam of the PRISMA beamline using a diamond detector

Author

Christopher D. Frost, Giuseppe Gorini, Marica Rebai, E. Perelli Cippo, Erik Schooneveld, Triestino Minniti, M. Tardocchi, Carlo Cazzaniga, Cazzaniga, C, Frost, C, Minniti, T, Schooneveld, E, Perelli Cippo, E, Tardocchi, M, Rebai, M, and Gorini, G

Subjects
Instrumentation for neutron sources, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, 01 natural sciences, Neutron time-of-flight scattering, Diamond Detectors, Nuclear physics, Diamond detector, Neutron flux, 0103 physical sciences, Neutron detection, Spallation, Neutron, Instrumentation for neutron source, 010306 general physics, Nuclear Experiment, Instrumentation, Mathematical Physics, beam-intensity monitor, Bonner sphere, Physics, 010308 nuclear & particles physics, Neutron radiation, Neutron backscattering, Beam-line instrumentation (beam position and profile monitors, beam-intensity monitors, bunch length monitors), Beam-line instrumentation (beam position and profile monitor, Physics::Accelerator Physics
Abstract

The high-energy neutron component (En > 10 MeV) of the neutron spectrum of PRISMA, a beam-line at the ISIS spallation source, has been characterized for the first time. Neutron measurements using a Single-crystal Diamond Detector at a short-pulse source are obtained by a combination of pulse height and time of flight analysis. An XY scan provides a 2D map of the high-energy neutron beam which has a diameter of about 40 mm. The high neutron flux, that has been found to be (3.8 ± 0.7) 105 cm−2s−1 for En > 10 MeV in the centre, opens up for a possible application of the beam-line as a high-energy neutron irradiation position. Results are of interest for the development of the ChipIR beam-line, which will feature an atmospheric-like neutron spectrum for chip irradiation experiment. Furthermore, these results demonstrate that diamond detectors can be used at spallation sources to investigate the transport of high-energy neutrons down instruments which is of interest in general to designers as high-energy neutrons are a source of background in thermal beamlines.

Published
2016
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10. A comparative study of reconstruction methods applied to Neutron Tomography

Author

Giuseppe Gorini, Triestino Minniti, Vincenzo Formoso, Winfried Kockelmann, D. Micieli, Micieli, D, Minniti, T, Formoso, V, Kockelmann, W, and Gorini, G

Subjects
Materials science, Computerized Tomography (CT) and Computed Radiography (CR), 010308 nuclear & particles physics, business.industry, Neutron tomography, Inspection with neutrons, Inspection with neutron, 02 engineering and technology, 021001 nanoscience & nanotechnology, Data processing Method, 01 natural sciences, Reconstruction method, Optics, 0103 physical sciences, 0210 nano-technology, business, Instrumentation, Mathematical Physics
Abstract

Neutron Tomography (NT) is an established technique to non-destructively investigate the inner structure of a wide range of objects. The major drawback of NT is the long acquisition time required to perform a tomographic scan compared to an X-ray Computed Tomography (CT) scan, due to the limited particle flux of the existing neutron sources. Therefore, in the NT field there is great interest in the reduction of scan time, dictated by the high neutrons production cost, aimed at optimizing the beamtime use at neutron imaging beamlines. A way for decreasing the total scan time is to reduce the number of projections. Generally, iterative reconstruction methods have advantages over analytical algorithms, such as the widely used Filtered Back-Projection (FBP), when data are noisy and limited. This research is focused on the comparative analysis of different reconstruction techniques, aimed at finding the data processing procedure suitable for NT, that reduces the scan time without reduction of the reconstructed image quality. For this purpose, a phantom sample was analysed by means of a white beam NT performed at the IMAT beamline, ISIS Neutron Source, U.K . Experimental data were used to test the performances of the FBP algorithm and different iterative reconstruction methods as a function of the number of projections and for different setups of the imaging system. The reconstructed images were quantitatively compared in terms of image quality indexes and the benefits of iterative methods for the limited data problem are discussed.

Published
2018
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11. Time-of-Flight Neutron Imaging on IMAT@ISIS: A New User Facility for Materials Science

Author

Daniel Nixon, Jongmin Lee, D.E. Pooley, Vincenzo Formoso, D. Micieli, Ranggi S. Ramadhan, Gareth D. Howells, Nick Draper, Joe Kelleher, Jason B. McPhate, Gabriele Salvato, Kenichi Watanabe, Anton S. Tremsin, Cirino Vasi, Sebastiano Trusso, William Halcrow, Genoveva Burca, Freddie A. Akeroyd, R. Ziesche, R. Ponterio, Triestino Minniti, Francesco Grazzi, Raffaele Giuseppe Agostino, Winfried Kockelmann, G. Vitucci, Anthony Reid, Chris Moreton-Smith, Tung Lik Lee, Giuseppe Gorini, Francesco Aliotta, David Keymer, Saurabh Kabra, J.B. Nightingale, Kockelmann, W, Minniti, T, Pooley, D, Burca, G, Ramadhan, R, Akeroyd, F, Howells, G, Moreton-Smith, C, Keymer, D, Kelleher, J, Kabra, S, Lee, T, Ziesche, R, Reid, A, Vitucci, G, Gorini, G, Micieli, D, Agostino, R, Formoso, V, Aliotta, F, Ponterio, R, Trusso, S, Salvato, G, Vasi, C, Grazzi, F, Watanabe, K, Lee, J, Tremsin, A, Mcphate, J, Nixon, D, Draper, N, Halcrow, W, and Nightingale, J

Subjects
time-of-flight, energy-selective imaging, energy-dispersive imaging, pulsed neutron source, Bragg edge imaging, neutron tomography, neutron radiography, 02 engineering and technology, lcsh:Computer applications to medicine. Medical informatics, 01 natural sciences, lcsh:QA75.5-76.95, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, User Facility, lcsh:Photography, Electrical and Electronic Engineering, Aerospace engineering, 010308 nuclear & particles physics, business.industry, Neutron imaging, Neutron tomography, lcsh:TR1-1050, 021001 nanoscience & nanotechnology, Computer Graphics and Computer-Aided Design, Neutron temperature, Time of flight, Component-based software engineering, lcsh:R858-859.7, Neutron source, lcsh:Electronic computers. Computer science, Computer Vision and Pattern Recognition, Tomography, 0210 nano-technology, business
Abstract

The cold neutron imaging and diffraction instrument IMAT at the second target station of the pulsed neutron source ISIS is currently being commissioned and prepared for user operation. IMAT will enable white-beam neutron radiography and tomography. One of the benefits of operating on a pulsed source is to determine the neutron energy via a time of flight measurement, thus enabling energy-selective and energy-dispersive neutron imaging, for maximizing image contrasts between given materials and for mapping structure and microstructure properties. We survey the hardware and software components for data collection and image analysis on IMAT, and provide a step-by-step procedure for operating the instrument for energy-dispersive imaging using a two-phase metal test object as an example.

Published
2018
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12. Towards high-resolution neutron imaging on IMAT

Author

G. Vitucci, Anton S. Tremsin, Triestino Minniti, Winfried Kockelmann, Minniti, T, Tremsin, A, Vitucci, G, and Kockelmann, W

Subjects
010302 applied physics, Materials science, Pixel, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Radiography, Neutron imaging, Instrumentation, Inspection with neutron, 01 natural sciences, Optics, 0103 physical sciences, Physics::Accelerator Physics, Instrumentation for neutron source, Neutron radiography, Neutron, Spallation, Tomography, Nuclear Experiment, business, Image resolution, Neutron detectors (cold, thermal, fast neutrons), Mathematical Physics
Abstract

IMAT is a new cold-neutron imaging facility at the neutron spallation source ISIS at the Rutherford Appleton Laboratory, U.K.. The ISIS pulsed source enables energy-selective and energy-resolved neutron imaging via time-of-flight (TOF) techniques, which are available in addition to the white-beam neutron radiography and tomography options. A spatial resolution of about 50 μm for white-beam neutron radiography was achieved early in the IMAT commissioning phase. In this work we have made the first steps towards achieving higher spatial resolution. A white-beam radiography with 18 μm spatial resolution was achieved in this experiment. This result was possible by using the event counting neutron pixel detector based on micro-channel plates (MCP) coupled with a Timepix readout chip with 55 μm sized pixels, and by employing an event centroiding technique. The prospects for energy-selective neutron radiography for this centroiding mode are discussed.

Published
2018
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13. Study of cluster structures in $^{10}$Be and $^{16}$C neutron-rich nuclei via break-up reactions

Author

E. De Filippo, N. S. Martorana, L. Francalanza, E. V. Pagano, Triestino Minniti, Luis Acosta, P. Russotto, Elio Rosato, Ivano Lombardo, G. Lanzalone, Amalia Pop, F. Amorini, B. Gnoffo, R. Andolina, A. Pagano, I. Berceanu, Lucrezia Auditore, F. Porto, Giuseppe Verde, G. Cardella, M. Trimarchi, S. Pirrone, M.B. Chatterjiee, Mariano Vigilante, F. Rizzo, G. Politi, A. Grzeszczuk, Michele Papa, D. Dell'Aquila, Antonio Trifiro, L. Quattrocchi, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Greco, V., Dell'Aquila, D., Acosta, L., Amorini, F., Andolina, R., Auditore, L., Berceanu, I., Cardella, G., Chatterjiee, M. B., De Filippo, E., Francalanza, L., Gnoffo, B., Grzeszczuk, A., Lanzalone, G., Lombardo, I., Martorana, N., Minniti, T., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Pop, A., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Physics, Nuclear reaction, States, 010308 nuclear & particles physics, QC1-999, Nuclear Structure, Nuclear Clustering, Light nuclei, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics and Astronomy (all), medicine.anatomical_structure, Helium-4, 0103 physical sciences, medicine, Neutron, Atomic physics, 010306 general physics, Spectroscopy, Isotopes of beryllium, Isotopes of helium, Nucleus, Excitation, Breakup Reaction
Abstract

International audience; Projectile break-up reactions induced on polyethylene (CH_2) target are used in order to study the spectroscopy of ^10Be and ^16C nuclei. For the present experiment we used ^10Be and ^16C beams delivered by the FRIBs facility at INFN-LNS, and the CHIMERA 4pi multi-detector. ^10Be and ^16C structures are studied via a relative energy analysis of break-up fragments. The ^4He+^6He break-up channel allowed us to study the spectroscopy of ^10Be; in particular we find evidence of a new state in ^10Be at 13.5 MeV excitation energy. The ^16C nucleus is studied via ^6He-^10Be correlation; we find the fingerprint of a possiblestate at about 20.6 MeV

Published
2015
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14. Study of resonances produced in light nuclei through two and multi particle correlations

Author

S. De Luca, Luis Acosta, A. Chbihi, G. Lanzalone, Giuseppe Verde, Elio Rosato, A. Anzalone, S. Pirrone, B Gnoffo, Martin Veselsky, Ismael Martel, A. Grzeszczuk, L. Francalanza, P. Russotto, A. Trifirò, E. V. Pagano, E. De Filippo, Mariano Vigilante, Michele Papa, N. S. Martorana, Triestino Minniti, F. Amorini, I. Berceanu, F. Rizzo, L. Quattrocchi, G. Cardella, D. Dell' Aquila, F. Porto, Lucrezia Auditore, S. Norella, G. Politi, A. Pagano, Ivano Lombardo, M. Trimarchi, Quattrocchi, L., Acosta, L., Amorini, F., Anzalone, A., Auditore, L., Berceanu, I., Cardella, G., Chbihi, A., De Filippo, E., De Luca, S., Dell'Aquila, D., Francalanza, L., Gnoffo, B., Grzeszczuk, A., Lanzalone, G., Lombardo, I., Martel, I., Martorana, N. S., Minniti, T., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Porto, F., Rizzo, F., Rosato, E., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., Veselsky, M., Vigilante, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
History, Light nucleus, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Light particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], multi particle correlations, 01 natural sciences, Multi particle correlations, Education, Physics and Astronomy (all), Nucleosynthesis, 0103 physical sciences, Cluster (physics), 010306 general physics, Light nuclei, Physics, 010308 nuclear & particles physics, light nuclei, State (functional analysis), Computer Science Applications, Resonances, Excited state, Particle, Atomic physics, α particles, Chemical elements, Alpha-cluster systems, Decay mechanisms, Light particles, Multi-detectors, Multi-particle correlation, Resonant state, Excited states
Abstract

CORRELATION experiment has been performed at INFN-LNS of Catania, using the 4pi multi-detector CHIMERA, with the aim of exploring correlations between two and multi light particle produced in 12C+24Mg collisions at 35 AMeV. Particular attention has been paid to the decay mechanisms of Hoyle state, an excited resonant state of 12C produced via the triple- alfa process and characterized by a pronounced molecular like structure with three-alfa particles. The study of the Hoyle state is essential for nucleosynthesis, but it also represents a clearly isolated state that can be studied as a three-alfa cluster system.

Published
2017
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