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126 results on '"Mancusi A"'

1. Unearthing the Chicago Piles: A Monte Carlo perspective

Author

Zoia Andrea and Mancusi Davide

Subjects
Physics, QC1-999
Abstract

The divergence of the Chicago Pile 1 (CP-1) on December 2nd, 1942, marks the birth of the nuclear age. Built under the West Stands of the Stagg Field in Chicago in slightly over two weeks, CP-1 was the first man-made nuclear reactor, conceived as a proof-of-principle physics experiment to demonstrate the feasibility of a self-sustained neutron chain reaction. The fuel consisted in a mixture of uranium oxide and metal uranium, with lumps of several sizes and shapes stacked within bricks of graphite used as moderator to form a cubic lattice. After only three months of operation, CP-1 was dismantled due to safety reasons and rebuilt at the Argonne Site in twenty-one days, under the name of Chicago Pile 2 (CP-2): the new pile had a longer life, contributing vastly to research on material science and nuclear reactor theory, and was finally decommissioned in 1954. Prompted by the eightieth anniversary of the Chicago Pile(s), in this talk we celebrate these astonishing scientific artifacts by building fully detailed three-dimensional digital twins of CP-1 and CP-2 using TRIPOLI-4®, the Monte Carlo code developed at CEA. Technological data for the models have been retrieved from published and unpublished documents of the Manhattan Project. We compare the simulation results to the available experimental measurements, encompassing the reactivity of the piles, the control rod worth, the kinetics parameters and several reactivity coefficients. For each, we examine the associated uncertainties due to missing or incomplete technological data as well as the bias due to nuclear data libraries.

Published
2024
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2. Accelerating split-exponential track length estimator on GPU in TRIPOLI-4®

Author

Antonsanti Pierre-Louis, Hutinet Henri, Mancusi Davide, and Le Loirec Cindy

Subjects
Physics, QC1-999
Abstract

In the context of computing 3D volumetric scores for nuclear applications, combiningMonte Carlo methods andHigh Performance Computing is key to achieve precise, computationally tractable simulations andmeet the industrial deadlines. The next-event “split exponential track-length estimator” (seTLE) is typically adapted to the estimation of a tally in a mesh. We take advantage of the computing capabilities of Graphics Processing Unit (GPU) to mitigate the CPU-intensive tasks involved in the application of the seTLE: the estimation of cross section, the sampling of many out-going pseudo-particles at collision, the ray tracing across the geometry and the accumulation of scores in volumes. We discuss the performance improvements brought by porting each of these steps to GPU. We discuss the influence of the many parameters involved, and select a working point providing the best trade-off between the acceleration factor and the GPU utilization. We show on two examples thatwe obtain an acceleration factor of 8.56 on average over the entire map for the shielding application (up to 50 behind the concrete shield), and of 6.30 on average for the criticality application (up to 16 in the burnable poison tubes), compared to standard TLE on CPU.

Published
2024
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3. Benchmarking of probability tables with TRIPOLI-5®

Author

Montecchio Cecilia, Larmier Coline, Mancusi Davide, and Zoia Andrea

Subjects
Physics, QC1-999
Abstract

In this work we present the verification of the unresolved resonance range treatment implementation in the Monte Carlo code TRIPOLI-5®, which relies on probability tables. For this purpose, we perform extensive code-to-code comparisons with respect to TRIPOLI-4® and OpenMC using two probability tables models (PURR and CALENDF), on a set of benchmark configurations. These tests allow on one hand verifying TRIPOLI-5® and on the other hand analyzing a number of discrepancies related both to the use of different probability tables models and more generally to the handling of nuclear data in the Monte Carlo codes.

Published
2024
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4. Highlighting cross section library effects on absorption rates and flux for natural elements in a thermal spectrum using TRIPOLI-5

Author

Fröhlicher Kévin, Dechenaux Benjamin, Mancusi Davide, Ichou Raphaëlle, and Malvagi Fausto

Subjects
Physics, QC1-999
Abstract

This work presents an investigation of cross section library effects with the new TRIPOLI-5 Monte Carlo code, a joint project between CEA, IRSN and EDF in France. Cross section library effects on the absorption rate and the flux spectrum were highlighted for natural elements subjected to a thermal neutron flux. The numerical benchmark that is presented here is a sphere with a radius of 30 cm filled with 10−2 atoms·(barn·cm)−1 of a single element according to its natural isotopic abundances. For the thermal flux case, a smaller sphere with a radius of 1 cm is placed at the center of the main sphere to obtain a thermal-like flux from a pointwise Maxwellian source using a mixture of hydrogen and boron-10. A total of 12 cross sections libraries have been compared.

Published
2024
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5. Benchmarking of the SPERT-III E-core experiment with the Monte Carlo codes TRIPOLI-4®, TRIPOLI-5® and OpenMC

Author

Dervaux Antoine, Kinast Shai, Lemaire Matthieu, Di Blasi Vincenzo, Larmier Coline, Mancusi Davide, and Zoia Andrea

Subjects
Physics, QC1-999
Abstract

This paper presents a code-to-code verification of the SPERT-III reactor in its E-core configuration using the Monte Carlo codes TRIPOLI-4®, TRIPOLI-5® and OpenMC. A SPERT-III E-core model was originally developed for the Monte Carlo code TRIPOLI-4® and will be the baseline of our analysis The simulation results obtained for the main reactor physics parameters (neutron effective multiplication factor, rod worth, reactivity coefficients and kinetics parameters) with TRIPOLI-4®and OpenMC using different nuclear data libraries are compared and analyzed. Additional verifications are carried out with the next-generation Monte Carlo code TRIPOLI-5®, which is currently under development by CEA and IRSN (France). This paper summarizes a joint study that was conducted within an international research collaboration between CEA Paris-Saclay (France) and the Nuclear Research Center Negev (NRCN, Israel), and is a stepping stone towards future multi-physics simulations exploring the SPERT-III reactor power excursions, including thermal-hydraulics feedback.

Published
2024
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6. Valjean, a universal post-processing tool for neutronics

Author

Le Ménédeu Ève and Mancusi Davide

Subjects
Physics, QC1-999
Abstract

Valjean is an open-source framework for workflow scheduling, post-processing and data analysis in verification and validation of neutronics codes. It provides native support for reading TRIPOLI-4® and APOLLO3® output files, but can be easily extended to other codes. We present here the structure of the Valjean package, together with a few typical usage examples.

Published
2024
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7. Towards a highly efficient and unbiased population-control algorithm for kinetic Monte Carlo simulations

Author

Montecchio Cecilia, Lamirand Vincent, Mancusi Davide, Monange Wilfried, and Zoia Andrea

Subjects
Physics, QC1-999
Abstract

Population-control methods are key to non-stationary Monte Carlo simulations of multiplying systems: they prevent either the unbounded growth or the disappearance of neutrons, occurring respectively in supercritical and subcritical conditions; furthermore, they contribute to an efficient allocation of computational resources by addressing the unbalance between the neutron and the precursor populations. In this paper, we present two alternative populationcontrol algorithms: the legacy implementation in TRIPOLI-4®, the Monte Carlo code developed at CEA, and an improved version that is currently under investigation, based on the use of a simplified point-kinetics solver. We assess the performance of these methods through the simulation of a $2.2 step reactivity insertion in a fast system (Flattop-Pu), leading to an increase of the neutron population by a factor 200, which is benchmarked against point kinetics. We show that the new implementation not only suppresses the slight bias that was present in the legacy method due to a stochastic normalization factor, but also outperforms the previous algorithm in terms of variance reduction and improvement of the figure of merit.

Published
2024
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8. Convergence of Monte Carlo methods for neutron noise

Author

Fauvel Axel, Rouchon Amélie, Mancusi Davide, and Zoia Andrea

Subjects
Physics, QC1-999
Abstract

The neutron noise δφ describes the small variations of the neutron flux around the stationary state φ0, and is typically due to vibrations or oscillations of the core components, induced by fluid-structure interactions and other generally unwanted phenomena. Knowledge of δφ is useful for core monitoring: for this purpose, in recent years several new computational methods have been proposed in order to solve the neutron noise equations with state-of-theart deterministic or Monte Carlo solvers. In this paper we present a preliminary investigation of the convergence properties of Monte Carlo methods for neutron noise analysis, in view of improving their reliability. We carry out our investigation on an infinite-medium benchmark configuration: despite the introduced simplifications, our findings suggest some universal features that represent a stepping stone towards a broader theoretical framework.

Published
2024
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9. Robustness of zero-variance Monte Carlo games

Author

Ferreira Thayz Gomes, Jinaphanh Alexis, Mancusi Davide, and Zoia Andrea

Subjects
Physics, QC1-999
Abstract

Zero-variance Monte Carlo games are ideal sampling strategies that provide the theoretical foundations upon which very successful variancereduction schemes are built. In this work, we explore the robustness of zerovariance games and assess in particular the impact of two common simplifications used in production Monte Carlo codes. First, using a discretized adjoint function to bias the kernels that define the stochastic process. Second, replacing the exact sampling of the flight kernel by approximate sampling strategies that are more amenable to be implemented in production Monte Carlo codes. The resulting effects on the variance and on the Figure of Merit (FoM) will be probed in the framework of a benchmark configuration based on the singlespeed two-direction transport model.

Published
2024
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10. Investigation of the structure in 235U(nth,fis) prompt gamma energy spectrum by FIFRELIN

Author

Ogawa Tatsuhiko, Litaize Olivier, Mancusi Davide, Chebboubi Abdelhazize, and Serot Olivier

Subjects
Physics, QC1-999
Abstract

The energy spectrum of prompt gamma-rays from 235U thermal fission is reproduced by a fission reaction model FIFRELIN to identify the origin of spectral features. This spectrum is characterized by a bump at 4-4.5 MeV, a shoulder at around 8 MeV, and a tail above 10 MeV, which are attributed to 132Sn and 133Sb, fission fragments with mass from 130 to 134, and those with mass from 99 to 104, charge from 40 to 42, and spin from 12 ℏto 16 ℏ, respectively. Among prompt gamma-rays, high-energy part is important to get insight into scission, because the quanta are emitted by highly excited fission fragments, which still keep the memory of the scission configuration. Our analysis suggests that coincidence detection of high energy gamma-rays and their source fission fragments identifying their isotopic species, spin and excitation energy with particular focus on those with mass number less than 104 will be useful to make conclusions about the origin of high energy gamma-rays.

Published
2024
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11. Droplet Digital PCR (ddPCR) Analysis for Detecting Shiga-Toxin-Producing Escherichia coli (STEC)

Author

Andrea Mancusi, Andrea Fulgione, Santa Girardi, Orlandina Di Maro, Federico Capuano, Yolande T. R. Proroga, and Daniela Cristiano

Subjects
Shiga-toxin-producing Escherichia coli, digital PCR, food safety, real-time PCR, stx genes, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

Verocytotoxin-producing Escherichia coli, also referred to as Shiga-toxin-producing Escherichia coli (STEC), can be transmitted to humans through person-to-person contact, consumption of contaminated food or water, or by direct contact with animals. Its clinical and economic consequences have prompted the development of alternative approaches to the official method of analysis “UNI CEN ISO/TS 13136: 2012”, which describes the identification of STEC through the detection of its main virulence genes. Recently, droplet digital PCR (ddPCR) has been proposed as a technique for the sequence-specific detection and direct quantification of nucleic acids. The present study aimed to investigate if ddPCR could be able to detect STEC in less time than that required by the official method. This study consisted of the ddPCR of slices of beef contaminated with STEC and of the sponges used for beef official control at the slaughter stage. The results showed the ability of ddPCR to detect STEC in slices of beef already after sample incubation for 7 h at 37 °C while, in the case of sponges used for official controls, 9 h at 37 °C was needed. In this way, the ddPCR could represent an efficient method for detecting STEC and providing results in less time than the official method.

Published
2022
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12. MULTI-PHYSICS TRANSIENT SIMULATIONS WITH TRIPOLI-4®

Author

Faucher Margaux, Mancusi Davide, and Zoia Andrea

Subjects
monte carlo simulation, neutron transport, multi-physics, transients, dynamic, Physics, QC1-999
Abstract

In this work, we present the first dynamic calculations performed with the Monte Carlo neutron transport code TRIPOLI-4R with thermal-hydraulics feedback. For this purpose, the Monte Carlo code was extended for multi-physics capabilities and coupled to the thermal-hydraulics subchannel code SUBCHANFLOW. As a test case for the verification of transient simulation capabilities, a 3x3-assembly mini-core benchmark based on the TMI-1 reactor is considered with a pin-by-pin description. Two reactivity excursion scenarios initiated by control-rod movement are simulated starting from a critical state and compared to analogous simulations performed using the Serpent 2 Monte-Carlo code. The time evolution of the neutron power, fuel temperature, coolant temperature and coolant density are analysed to assess the multi-physics capabilities of TRIPOLI-4. The stabilizing e_ects of thermal-hydraulics on the neutron power appear to be well taken into account. The computational requirements for massively parallel calculations are also discussed.

Published
2021
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13. TOWARDS THE VALIDATION OF NOISE EXPERIMENTS IN THE CROCUS REACTOR USING THE TRIPOLI-4 MONTE CARLO CODE IN ANALOG MODE

Author

Pakari Oskari, Mancusi Davide, Petit Odile, Zoia Andrea, Lamirand Vincent, and Pautz Andreas

Subjects
neutron noise, monte carlo, validation, crocus, tripoli-4, Physics, QC1-999
Abstract

Intrinsic neutron noise experiments offer a non-invasive manner to measure the prompt decay constant or reactivity of fissile systems. Using the fluctuations in the density of fission chains, one can infer the kinetics parameters via correlation analysis such as the Rossi-alpha method. The models allowing for the interpretation of these measurements typically rely on the assumption of the system behaving according to point kinetics. When dealing with systems where point kinetics fail to predict the true time correlation – such as heterogeneous or large cores – the direct simulation of fission chains using Monte Carlo methods appears as the only reliable candidate to provide reference predictions for the correlation functions. Monte Carlo methods using explicit fission model libraries are thus being examined as tools for prediction in noise analysis. In this work we illustrate the developments and simulation results of the analog transport capabilities of the TRIPOLI-4 Monte Carlo code coupled with the LLNL fission library FREYA, as applied to a set of neutron noise experiments carried out in the CROCUS zero-power reactor with emphasis on the identification of spatial effects. To validate the general capability of the code to predict noise correlations, we examine time distributions of the whole core fission and explicit detection reactions. We present the methodology to achieve a good agreement between experiments and simulations. We reproduced experimental results for relative α, within typical biases, and conclude on the general feasibility of the analog method. We further explore a decoupled core model and analyze it using the noise method. The results indicate an effective method to treat decoupled systems.

Published
2021
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14. TOWARDS ZERO-VARIANCE SCHEMES FOR KINETIC MONTE-CARLO SIMULATIONS

Author

Mancusi Davide and Zoia Andrea

Subjects
monte carlo, variance reduction, zero-variance scheme, kinetics, precursors, Physics, QC1-999
Abstract

The solution of the time-dependent transport problem for neutrons and precursors in a nuclear reactor is hard to treat in a naive Monte-Carlo framework because of the largely different time scales associated to the prompt-fission chains and to the decay of precursors. The increasing computer power and the development of variance-reduction techniques specific for reactor kinetics have recently unlocked the possibility to calculate reference solutions to the time-dependent transport problem. However, the application of time-dependent Monte Carlo to large systems (i.e., a full reactor core) is still stifled by the enormous computational requirements. In this paper, we formulate the construction of an optimal Monte-Carlo strategy (in the sense that it results in a zero-variance estimator) for a specific observable in time-dependent transport, in analogy with the existing schemes for stationary problems. As far as we are aware, zero-variance Monte-Carlo schemes for neutron-precursor kinetics have never been proposed before. We verify our construction with numerical calculations for a benchmark transport problem.

Published
2021
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15. Advances in Monte-Carlo code TRIPOLI-4®’s treatment of the electromagnetic cascade

Author

Mancusi Davide, Bonin Alice, Hugot François-Xavier, and Malouch Fadhel

Subjects
Physics, QC1-999
Abstract

TRIPOLI-4® is a Monte-Carlo particle-transport code developed at CEA-Saclay (France) that is employed in the domains of nuclear-reactor physics, criticality-safety, shielding/radiation protection and nuclear instrumentation. The goal of this paper is to report on current developments, validation and verification made in TRIPOLI-4 in the electron/positron/photon sector. The new capabilities and improvements concern refinements to the electron transport algorithm, the introduction of a charge-deposition score, the new thick-target bremsstrahlung option, the upgrade of the bremsstrahlung model and the improvement of electron angular straggling at low energy. The importance of each of the developments above is illustrated by comparisons with calculations performed with other codes and with experimental data.

Published
2018
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16. Monte Carlo calculations of nucleon-induced fission in the GeV energy range

Author

Meo Sergio Lo, Mancusi Davide, Massimi Cristian, Tarrio Diego, Vannini Gianni, and Ventura Alberto

Subjects
Physics, QC1-999
Abstract

In the present work the Monte Carlo calculations of nucleon-induced fission on actinides and pre-actinides from 100 MeV to 1 GeV, described in a recent paper of ours [1], are extended up to an incident energy of 8 GeV. The calculated (p,f) cross sections are compared with the few experimental data available in the literature. The same model parameters are used to predict (n,f) cross sections in the same energy range. Possible shortcomings of decay models at high incident energies are discussed.

Published
2017
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17. Rigorous-two-Steps scheme of TRIPOLI-4® Monte Carlo code validation for shutdown dose rate calculation

Author

Jaboulay Jean-Charles, Brun Emeric, Hugot François-Xavier, Huynh Tan-Dat, Malouch Fadhel, Mancusi Davide, and Tsilanizara Aime

Subjects
Physics, QC1-999
Abstract

After fission or fusion reactor shutdown the activated structure emits decay photons. For maintenance operations the radiation dose map must be established in the reactor building. Several calculation schemes have been developed to calculate the shutdown dose rate. These schemes are widely developed in fusion application and more precisely for the ITER tokamak. This paper presents the rigorous-two-steps scheme implemented at CEA. It is based on the TRIPOLI-4® Monte Carlo code and the inventory code MENDEL. The ITER shutdown dose rate benchmark has been carried out, results are in a good agreement with the other participant.

Published
2017
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18. Progress on the TRIPOLI-4®-Geant4 coupling

Author

Mancusi Davide, Bringer Olivier, and Monot Pascal

Subjects
Physics, QC1-999
Abstract

The capability to simulate the transport of charged and/or high-energy hadrons (especially protons) is indispensable for a number of applications. This includes, among others, simulation studies concerned with radiation protection and decommissioning around accelerators and high-intensity laser facilities, as well as beam characterisation in spallation neutron sources. In the context of Monte-Carlo particle transport codes, solving these problems often requires the use of advanced variance-reduction techniques. TRIPOLI-4® is a reference Monte-Carlo particle transport code for the simulation of low-energy (≲ 20 MeV) neutrons and photons and offers a wide range of sophisticated variance-reduction schemes; however, it cannot be applied to the problems mentioned above because it lacks the capability to transport charged, high-energy hadrons. This limitation can be circumvented by coupling TRIPOLI-4r with the Geant4 particle-transport toolkit. We present here the first results of this coupling.

Published
2017
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19. On the role of secondary pions in spallation targets

Author

Mancusi Davide, Lo Meo Sergio, Colonna Nicola, and Massimi Cristian

Subjects
Physics, QC1-999
Abstract

We use particle-transport simulations to show that secondary pions play a crucial role for the development of the hadronic cascade and therefore for the production of neutrons and photons from a thick spallation target. Considering the spallation target of the n_TOF Facility at CERN, we see that photon and neutron yields are relatively insensitive to large changes of the average pion multiplicity in the individual spallation reactions. We characterize this robustness as a peculiar property of hadronic cascades in thick targets.

Published
2017
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20. Recent developments in the TRIPOLI-4® Monte-Carlo code for shielding and radiation protection applications

Author

Malouch Fadhel, Brun Emeric, Diop Cheikh, Hugot François-Xavier, Jouanne Cédric, Lee Yi-Kang, Malvagi Fausto, Mancusi Davide, Mazzolo Alain, Petit Odile, Trama Jean-Christophe, Visonneau Thierry, and Zoia Andrea

Subjects
Physics, QC1-999
Abstract

TRIPOLI-4® is a 3D continuous-energy Monte-Carlo particle transport code developed by CEA (SERMA) and devoted to shielding, reactor physics, criticality-safety and nuclear instrumentation. In this paper, we present the recent developments in the TRIPOLI-4® for shielding and radiation protection applications. Some of these additional features are already available in the TRIPOLI-4® version 10 released in December 2015. Other features are in development.

Published
2017
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21. TOWARDS ZERO-VARIANCE SCHEMES FOR KINETIC MONTE-CARLO SIMULATIONS

Author

Davide Mancusi and Andrea Zoia

Subjects
010308 nuclear & particles physics, Computer science, monte carlo, Physics, QC1-999, Monte Carlo method, variance reduction, Estimator, Observable, Nuclear reactor, 01 natural sciences, law.invention, Nuclear reactor core, law, kinetics, 0103 physical sciences, Benchmark (computing), Variance reduction, Statistical physics, Kinetic Monte Carlo, precursors, 010306 general physics, zero-variance scheme
Abstract

The solution of the time-dependent transport problem for neutrons and precursors in a nuclear reactor is hard to treat in a naive Monte-Carlo framework because of the largely different time scales associated to the prompt-fission chains and to the decay of precursors. The increasing computer power and the development of variance-reduction techniques specific for reactor kinetics have recently unlocked the possibility to calculate reference solutions to the time-dependent transport problem. However, the application of time-dependent Monte Carlo to large systems (i.e., a full reactor core) is still stifled by the enormous computational requirements. In this paper, we formulate the construction of an optimal Monte-Carlo strategy (in the sense that it results in a zero-variance estimator) for a specific observable in time-dependent transport, in analogy with the existing schemes for stationary problems. As far as we are aware, zero-variance Monte-Carlo schemes for neutron-precursor kinetics have never been proposed before. We verify our construction with numerical calculations for a benchmark transport problem.

Published
2021

22. TOWARDS THE VALIDATION OF NOISE EXPERIMENTS IN THE CROCUS REACTOR USING THE TRIPOLI-4 MONTE CARLO CODE IN ANALOG MODE

Author

Davide Mancusi, Andrea Zoia, Odile Petit, Vincent Lamirand, Andreas Pautz, Oskari Pakari, Blaise, Patrick, and Margulis, Marat

Subjects
Physics, validation, Fissile material, 010308 nuclear & particles physics, Fission, monte carlo, 020209 energy, QC1-999, Monte Carlo method, Emphasis (telecommunications), 02 engineering and technology, crocus, 01 natural sciences, Measure (mathematics), Noise, tripoli-4, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, neutron noise, Statistical physics, Exponential decay, Core model
Abstract

Intrinsic neutron noise experiments offer a non-invasive manner to measure the prompt decay constant or reactivity of fissile systems. Using the fluctuations in the density of fission chains, one can infer the kinetics parameters via correlation analysis such as the Rossi-alpha method. The models allowing for the interpretation of these measurements typically rely on the assumption of the system behaving according to point kinetics. When dealing with systems where point kinetics fail to predict the true time correlation – such as heterogeneous or large cores – the direct simulation of fission chains using Monte Carlo methods appears as the only reliable candidate to provide reference predictions for the correlation functions. Monte Carlo methods using explicit fission model libraries are thus being examined as tools for prediction in noise analysis. In this work we illustrate the developments and simulation results of the analog transport capabilities of the TRIPOLI-4 Monte Carlo code coupled with the LLNL fission library FREYA, as applied to a set of neutron noise experiments carried out in the CROCUS zero-power reactor with emphasis on the identification of spatial effects. To validate the general capability of the code to predict noise correlations, we examine time distributions of the whole core fission and explicit detection reactions. We present the methodology to achieve a good agreement between experiments and simulations. We reproduced experimental results for relative α, within typical biases, and conclude on the general feasibility of the analog method. We further explore a decoupled core model and analyze it using the noise method. The results indicate an effective method to treat decoupled systems.

Published
2021

23. A new hybrid next-event estimator for photon-based Monte Carlo dose rate calculations

Author

Cheikh Diop, Ettore Guadagni, Cindy Le Loirec, Y. Peneliau, Davide Mancusi, Jean Michel Létang, Institut de recherche sur les systèmes nucléaires pour la production d'énergie bas carbone (IRESNE), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Imagerie Tomographique et Radiothérapie, Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut des Sciences Appliquées et de la Simulation pour les énergies bas carbone (ISAS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL)

Subjects
Physics, Photon, Speedup, 010308 nuclear & particles physics, Monte Carlo method, General Physics and Astronomy, Estimator, 01 natural sciences, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, 3. Good health, 030218 nuclear medicine & medical imaging, Exponential function, 03 medical and health sciences, 0302 clinical medicine, Monte carlo code, 0103 physical sciences, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], Applied mathematics, Dose rate, Event (probability theory)
Abstract

This work describes the implementation of a deterministic-like straight-line transport routine inside the $$\hbox {TRIPOLI-4}^{\circledR }$$ Monte Carlo code, aimed at developing a hybrid estimator that can speed up the MC calculation while retaining its precision. The algorithm is based on the exponential track length estimator or eTLE, a next-event estimator that has already been investigated for medical applications. In this implementation, the eTLE is paired with a forced detection algorithm. We describe the implementation of the method in $$\hbox {TRIPOLI-4}^{\circledR }$$ , then we present the first results obtained over some test cases and compare them with the classic track-length estimator already implemented in $$\hbox {TRIPOLI-4}^{\circledR }$$ . These results show that the forced detection technique drastically improves the eTLE performance.

Published
2021
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24. MULTI-PHYSICS TRANSIENT SIMULATIONS WITH TRIPOLI-4®

Author

Margaux Faucher, Davide Mancusi, and Andrea Zoia

Subjects
Physics, Neutron transport, dynamic, transients, 020209 energy, Nuclear engineering, QC1-999, Monte Carlo method, Time evolution, monte carlo simulation, 02 engineering and technology, 01 natural sciences, neutron transport, 010305 fluids & plasmas, Coolant, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Benchmark (computing), multi-physics, Neutron, Transient (oscillation), Massively parallel
Abstract

In this work, we present the first dynamic calculations performed with the Monte Carlo neutron transport code TRIPOLI-4R with thermal-hydraulics feedback. For this purpose, the Monte Carlo code was extended for multi-physics capabilities and coupled to the thermal-hydraulics subchannel code SUBCHANFLOW. As a test case for the verification of transient simulation capabilities, a 3x3-assembly mini-core benchmark based on the TMI-1 reactor is considered with a pin-by-pin description. Two reactivity excursion scenarios initiated by control-rod movement are simulated starting from a critical state and compared to analogous simulations performed using the Serpent 2 Monte-Carlo code. The time evolution of the neutron power, fuel temperature, coolant temperature and coolant density are analysed to assess the multi-physics capabilities of TRIPOLI-4. The stabilizing e_ects of thermal-hydraulics on the neutron power appear to be well taken into account. The computational requirements for massively parallel calculations are also discussed.

Published
2021

25. Production of Hypernuclei and Strange Particles in Spallation Reactions at a Few GeV Using an Intranuclear Cascade Approach

Author

Jason Hirtz, Joseph Cugnon, Ingo Leya, Georg Schnabel, Sylvie Leray, J.-C. David, J. L. Rodriguez-Sanchez, A. Boudard, and Davide Mancusi

Subjects
Physics, 010308 nuclear & particles physics, Nuclear Theory, Strangeness, 7. Clean energy, 01 natural sciences, Germanium compounds, Nuclear physics, medicine.anatomical_structure, Cascade, 0103 physical sciences, medicine, Cluster (physics), Spallation, Nuclear Experiment, 010306 general physics, Nucleon, Nucleus
Abstract

Motivated by a renewed interest in studies of hypernuclei, the strangeness degree of freedom was implemented in the intranuclear cascade model INCL. This model takes care of the first stage of reactions between a nucleon (or a light cluster) and a nucleus at energies from a few tens of MeV up to a few GeV. After emission of fast particles, a hot remnant nucleus is produced and another model, combined to INCL, handles the de-excitation (Abla in our case). The main ingredients are discussed and we compare the results to experimental data.

Published
2020
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26. 2-D periodic structures. A numerical study

Author

Geminiano Mancusi and Giuseppe Rocchetta

Subjects
Physics, lcsh:Commerce, Band gap, Frequency band, Context (language use), Noise (electronics), Square (algebra), Vibration, Perspective (geometry), lcsh:HF1-6182, RUC, Automotive Engineering, Frequency band gaps, lcsh:Finance, lcsh:HG1-9999, Statistical physics, 2D lattice structures, Value (mathematics)
Abstract

Purpose Within the context of 2D square lattices, searching for the existence of band gaps assumes a great interest owing to many possible fields of application: from energy absorption devices to noise and vibration controllers, as well as advanced strategies for the seismic isolation. Design/methodology/approach The underlying microstructure may influence the mechanical response of 2D square lattices according to a complex interplay between different factors. A first one is related to the so-called “size-effect”. A second one relates, instead, to the mass density distribution. Findings It has been observed that lumped masses may induce additional band gaps to appear and may magnify their width. Finally, an additional factor deals with the inner damping characteristics of the constituent materials, which usually are polymer-based. Originality/value This study focuses on the first factor from a specific perspective: to investigate the influence of the size effect on the existence and properties of frequency band gaps.

Published
2018
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27. Advances in the Treatment of the Electromagnetic Cascade in the TRIPOLI-4 Monte Carlo Code

Author

Davide Mancusi, F. X. Hugot, Fadhel Malouch, and Alice Bonin

Subjects
Physics, Nuclear and High Energy Physics, Photon, business.industry, Nuclear engineering, Monte Carlo method, Bremsstrahlung, Electron, Nuclear Energy and Engineering, Nuclear reactor physics, Criticality, Electromagnetic shielding, Electrical and Electronic Engineering, Radiation protection, business
Abstract

TRIPOLI-4 is a Monte Carlo particle transport code developed at CEA Saclay (France) that is employed in the domains of nuclear reactor physics, criticality safety, shielding/radiation protection, and nuclear instrumentation. The goal of this paper is to report on current developments, validation, and verification made in TRIPOLI-4 in the treatment of electron/positron/photon transport. The new capabilities and improvements concern refinements to the electron transport algorithm, the introduction of a charge-deposition score, the new thick-target bremsstrahlung option, the upgrade of the bremsstrahlung model, and the improvement of electron angular straggling at low energy. The importance of each of the developments mentioned above is illustrated by comparisons with calculations performed with other codes and with experimental data.

Published
2018
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28. Accelerating Monte Carlo Shielding Calculations in TRIPOLI-4 with a Deterministic Adjoint Flux

Author

Eric Dumonteil, Davide Mancusi, H. Louvin, Michel Nowak, Daniele Sciannandrone, Emiliano Masiello, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Physics, [PHYS]Physics [physics], 010308 nuclear & particles physics, business.industry, Radiation field, Monte Carlo method, Detector, 0211 other engineering and technologies, Flux, 02 engineering and technology, 01 natural sciences, Particle transport, Computational physics, Nuclear Energy and Engineering, 0103 physical sciences, Electromagnetic shielding, 021108 energy, Radiation protection, business
Abstract

In radiation protection studies, the goal is to estimate the response of a detector exposed to a strongly attenuated radiation field. Monte Carlo (MC) particle transport codes give the possibility to efficiently solve for such responses using several variance-reduction (VR) methods that help allocating more CPU time to the simulation of highly contributing histories. The TRIPOLI-4® MC particle transport code offers two main methods, the exponential transform and adaptive multilevel splitting (AMS), which rely on the definition of a suitable importance map. In this paper, we present an implementation of a generalized Consistent Adjoint Driven Importance Sampling (CADIS) methodology for TRIPOLI-4. The implementation relies on coupling with the IDT code, a deterministic solver for the Boltzmann adjoint transport equation, for the generation of importance maps. We study the performance of both VR methods present in TRIPOLI-4 in this setting. In particular, to our knowledge, this is the first time that a CADIS-like methodology has been applied to AMS. © 2019, © 2019 American Nuclear Society.

Published
2019
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29. New features of the INCL model for spallation reactions

Author

Davide Mancusi, J. L. Rodriguez-Sanchez, J.-C. David, Joseph Cugnon, Sylvie Leray, A. Boudard, Jason Hirtz, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Physics, History, Range (particle radiation), [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, 01 natural sciences, Computer Science Applications, Education, Set (abstract data type), Nuclear physics, Cascade, 0103 physical sciences, Cluster (physics), Incident energy, Spallation, 010306 general physics, Focus (optics), Nuclear Experiment, Energy (signal processing)
Abstract

The recent developments of the Liège intranuclear cascade model INCL are reviewed. The INCL4.6 version of this model was able when coupled with the ABLA07 de-excitation code, to describe rather well a huge set of experimental data in an incident energy range spanning between 200 MeV and 3 GeV, as it has been testified by an intercomparison of spallation codes organized by the IAEA. Since that time, the model has been implemented in several nuclear particle transport codes. Therefore, the possible applications of INCL have been enlarged to focus on diverse fields, and in the recent years, the model has been further developed to be applicable to these new issues and also to cope with remaining deficiencies. The new features include: i) a sophisticated dynamical model for light cluster emission (up to O ions), ii) the accommodation of light nuclei as projectiles, iii) a new procedure to take account of the fuzziness of the Fermi surface, and iv) an extension of the model to higher energy. The aim of this contribution is to present for the first time and to discuss the physics of the added features, and to give a hint about the performances of the new model.

Published
2019
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30. Study of the reaction mechanisms of $^{136}$Xe + p and $^{136}$Xe + $^{12}$C at 1 A GeV with inverse kinematics and large-acceptance detectors

Author

B. Czech, Sylvie Leray, C. Caesar, Haik Simon, Enrique Casarejos, J.E. Ducret, Josef Klimo, S. Pietri, Alain Boudard, Sébastien Bianchin, Martin Veselsky, Christopher Rappold, S. Hlavac, O. Yordanov, Marie-Delphine Salsac, Olga Borodina, Davide Mancusi, T. Gorbinet, Tudy Le Bleis, C. Langer, N. Kurz, Thomas Aumann, J. Lukasik, Piotr Pawłowski, Yassid Ayyad, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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), Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), and 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)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Charged particle, Nuclear physics, Excited state, 0103 physical sciences, Nuclear fusion, Neutron, 010306 general physics, Nucleon, Nuclear Experiment, Excitation
Abstract

International audience; The reactions$^{136}$Xe + p and$^{136}$Xe +$^{12}$C have been studied in inverse kinematics at 1 A GeV with the SPALADiN setup at GSI. The detection in coincidence of the final-state charged particles (projectile residues, nuclei of charge $ Z \geq 2$ and neutrons was performed with a big-aperture dipole magnet and large-acceptance detectors. This provided an extended coverage of the phase space of decay products of the prefragment formed at the end of the intranuclear cascade. This coincidence measurement, performed on an event-by-event basis permits both an estimate of the excitation energy of the prefragments and a determination of their deexcitation channels. The element production cross sections are compared with existing data and theoretical models. The evolution of observables such as the total multiplicity or the fragment production with the prefragment’s excitation energy is studied for both reactions and compared with models.

Published
2019
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31. The Liège Intranuclear Cascade model – Towards a unified description of nuclear reactions induced by nucleons and light ions from a few MeV to a few GeV

Author

Cugnon Joseph, Boudard Alain, David Jean-Christophe, Leray Sylvie, and Mancusi Davide

Subjects
Physics, QC1-999
Abstract

The predictive power of the last version INCL4.6 of the Liège Intranuclear Cascade model for spallation is reviewed. The good results obtained both at low and high energy extend the domain of validity of the model and allow the description of spallation reactions, except the coherent processes, by a unique model from a few MeV to a few GeV incident energy.

Published
2014
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32. Fission induced by nucleons at intermediate energies

Author

Alberto Ventura, Cristian Massimi, S. Lo Meo, Davide Mancusi, G. Vannini, Lo Meo, S., ENEA, Centro Ricerche Ezio Clementel, INFN sezione di Bologna, Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Dipartimento di Fisica dell'Università di Bologna, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN, Sezione di Bologna), Istituto Nazionale di Fisica Nucleare (INFN)- Istituto Nazionale di Fisica Nucleare (INFN)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), S. L. Meo, D. Mancusi, C. Massimi, G. Vannini, A. Ventura, Dipartimento di Fisica [Bologna], and Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)

Subjects
Fission, Nuclear and High Energy Physics, Cold fission, NEUTRON-INDUCED FISSION, Nuclear Theory, Monte Carlo method, U-238, Spallation reactions, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], MEV PROTONS, 7. Clean energy, 01 natural sciences, CROSS-SECTIONS, Nuclear Theory (nucl-th), Nuclear physics, YIELDS, Intermediate nucleon energie, 0103 physical sciences, LEVEL DENSITY, Neutron, Intermediate nucleon energies, Nuclear Experiment, 010306 general physics, Physics, Cluster decay, Isotope, 010308 nuclear & particles physics, BISMUTH, Actinide, BI-209, Spallation reaction, CASCADE-EXCITON MODEL, TH-232, Atomic physics, Nucleon
Abstract

Monte Carlo calculations of fission of actinides and pre-actinides induced by protons and neutrons in the energy range from 100 MeV to 1 GeV are carried out by means of a recent version of the Li\`ege Intranuclear Cascade Model, INCL++, coupled with two different evaporation-fission codes, GEMINI++ and ABLA07. In order to reproduce experimental fission cross sections, model parameters are usually adjusted on available (p,f) cross sections and used to predict (n,f) cross sections for the same isotopes., Comment: 36 pages, 18 figures, to appear in Nuclear Physics A

Published
2015
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33. Monte Carlo calculations of nucleon-induced fission in the GeV energy range

Author

Cristian Massimi, Davide Mancusi, Diego Tarrio, Sergio Lo Meo, G. Vannini, Alberto Ventura, Meo, Sergio Lo, Mancusi, Davide, Massimi, Cristian, Tarrio, Diego, Vannini, Gianni, Ventura, Alberto, and Lo Meo, S.

Subjects
Physics, Range (particle radiation), Work (thermodynamics), 010308 nuclear & particles physics, Fission, QC1-999, Monte Carlo method, Nuclear Theory, Actinide, 01 natural sciences, Nuclear physics, Subatomär fysik, Physics and Astronomy (all), 0103 physical sciences, Subatomic Physics, Incident energy, 010306 general physics, Nucleon, Nuclear Experiment, Energy (signal processing)
Abstract

In the present work the Monte Carlo calculations of nucleon-induced fission on actinides and pre-actinides from 100 MeV to 1 GeV, described in a recent paper of ours [1], are extended up to an incident energy of 8 GeV. The calculated (p,f) cross sections are compared with the few experimental data available in the literature. The same model parameters are used to predict (n,f) cross sections in the same energy range. Possible shortcomings of decay models at high incident energies are discussed. © The Authors, published by EDP Sciences, 2017.

Published
2017

34. On the role of secondary pions in spallation targets

Author

Cristian Massimi, Joseph Cugnon, Nicola Colonna, V. Vlachoudis, Sergio Lo Meo, M. A. Cortés-Giraldo, J. Lerendegui-Marco, Davide Mancusi, Jean-Christophe David, Sylvie Leray, Alain Boudard, Lo Meo, S., Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Mancusi, Davide, Lo Meo, Sergio, Colonna, Nicola, Boudard, Alain, Cortés-Giraldo, Miguel Antonio, Cugnon, Joseph, David, Jean-Christophe, Leray, Sylvie, Lerendegui-Marco, Jorge, Massimi, Cristian, Vlachoudis, Vasilis, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Service des Réacteurs et de Mathématiques Appliquées ( SERMA ), Département de Modélisation des Systèmes et Structures ( DM2S ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Nuclear and High Energy Physics, Photon, Nuclear Theory, nucl-th, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Physics::Instrumentation and Detectors, QC1-999, Hadron, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear Theory (nucl-th), Nuclear physics, Physics and Astronomy (all), Pion, Neutron yield, 0103 physical sciences, Nuclear Physics - Experiment, Spallation, Neutron, Irradiation, Nuclear Experiment (nucl-ex), [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear and High Energy Physics Spallation, 010306 general physics, Nuclear Experiment, [ PHYS.NUCL ] Physics [physics]/Nuclear Theory [nucl-th], Physics, Large Hadron Collider, 010308 nuclear & particles physics, Multiplicity (mathematics), Cascade, Nuclear Physics - Theory, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract

We use particle-transport simulations to show that secondary pions play a crucial role for the development of the hadronic cascade and therefore for the production of neutrons and photons from thick spallation targets. In particular, for the n_TOF lead spallation target, irradiated with 20 GeV/c protons, neutral pions are involved in the production of ~90% of the high-energy photons; charged pions participate in ~40% of the integral neutron yield. Nevertheless, photon and neutron yields are shown to be relatively insensitive to large changes of the average pion multiplicity in the individual spallation reactions. We characterize this robustness as a peculiar property of hadronic cascades in thick targets., Comment: 17 pages, 14 figures. Submitted to Eur. Phys. J. A

Published
2017
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35. Excitation functions of the natCr(p,x)44Ti, 56Fe(p,x)44Ti, natNi(p,x)44Ti and 93Nb(p,x)44Ti reactions at energies up to 2.6 GeV

Author

Kenji Nishihara, Yu. E. Titarenko, K. V. Pavlov, Davide Mancusi, A. V. Ignatyuk, Harphool Kumawat, S. A. Balyuk, Jean-Christophe David, Y. Yariv, Sylvie Leray, A. Yu. Titarenko, V. F. Batyaev, A. Yu. Stankovskiy, Joseph Cugnon, M. V. Chauzova, Stepan G. Mashnik, V. M. Zhivun, Norihiro Matsuda, Alain Boudard, and P. V. Bebenin

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, 0103 physical sciences, Analytical chemistry, Irradiation, Nuclide, Atomic physics, 010306 general physics, 01 natural sciences, Instrumentation, Excitation
Abstract

The paper presents the measured cumulative yields of 44 Ti for nat Cr, 56 Fe, nat Ni and 93 Nb samples irradiated by protons at the energy range 0.04–2.6 GeV. The obtained excitation functions are compared with calculations of the well-known codes: ISABEL, Bertini, INCL4.2+ABLA, INCL4.5+ABLA07, PHITS, CASCADE07 and CEM03.02. The predictive power of these codes regarding the studied nuclides is analyzed.

Published
2016
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36. The elusiveness of multifragmentation footprints in 1-GeV proton-nucleus reations

Author

Boudard A., Mancusi D., Cugnon J., David J.-C., Gorbinet T., and Leray S.

Subjects
Physics, QC1-999
Abstract

We use the tools of hybrid intranuclear-cascade/nuclear-de-excitation models to evaluate the sensitivity of several physical observables to the inclusion of a multifragmentation stage in the deexcitation chain and assess the need for a multifragmentation model in the quantitative description of p + 56 Fe and p + 136 Xe reactions at 1-GeV incident energy. We seek clear signatures of multifragmentation by comparing different state-of-the-art de-excitation models coupled with intranuclear-cascade models and by focusing on discriminating observables such as correlations and fragment longitudinal-velocity distributions. None of the considered observables can be unambiguously interpreted as a multifragmentation footprint. The experimental data are best described as originating from sequential binary decays. However, no de-excitation model can reproduce the experimental longitudinal-volocity distributions from 1-GeV p + 136 Xe.

Published
2012
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37. $\eta$ η and $\omega$ ω mesons as new degrees of freedom in the intranuclear cascade model INCL

Author

A. Boudard, J. L. Rodriguez-Sanchez, J.-C. David, Joseph Cugnon, Sylvie Leray, Davide Mancusi, Jason Hirtz, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées ( SERMA ), Département de Modélisation des Systèmes et Structures ( DM2S ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay

Subjects
rare decay, Particle physics, Nuclear Theory, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Meson, hypernucleus, Degrees of freedom (physics and chemistry), General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], meson, 7. Clean energy, 01 natural sciences, Omega, Pion, 0103 physical sciences, fission, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], numerical calculations, strange particle, Nuclear Experiment, 010306 general physics, intranuclear cascade, [ PHYS.NUCL ] Physics [physics]/Nuclear Theory [nucl-th], nucleon nucleon: interaction, Fluid Flow and Transfer Processes, Physics, energy: high, 010308 nuclear & particles physics, nucleus, nucleon, Hypernucleus, pi nucleon: interaction, Automatic Keywords, Cascade, High Energy Physics::Experiment, Production (computer science), Nucleon
Abstract

The intranuclear cascade model INCL (Li\`ege Intranuclear Cascade) is now able to simulate spallation reactions induced by projectiles with energies up to roughly 15 GeV. This was made possible thanks to the implementation of multipion emission in the NN, $\Delta$N and $\pi$N interactions. The results obtained with reactions on nuclei induced by nucleons or pions gave confidence in the model. A next step will be the addition of the strange particles, $\Lambda$, $\Sigma$ and Kaons, in order to not only refine the high-energy modeling, but also to extend the capabilities of INCL, as studying hypernucleus physics. Between those two versions of the code, the possibility to treat the $\eta$ and $\omega$ mesons in INCL has been performed and this is the topic of this paper. Production yields of these mesons increase with energy and it is interesting to test their roles at higher energies. More specifically, studies of $\eta$ rare decays benefit from accurate simulations of its production. These are the two reasons for their implementation. Ingredients of the model, like elementary reaction cross sections, are discussed and comparisons with experimental data are carried out to test the reliability of those particle productions., Comment: 22 pages, 17 figures, submitted to EPJ Plus

Published
2018
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38. Production of strange particles and hypernuclei in nuclear reactions at a few GeV. New capabilities in the INCL intranuclear cascade model

Author

Davide Mancusi, Sylvie Leray, Ingo Leya, Joseph Cugnon, A. Boudard, Georg Schnabel, J.-C. David, Jason Hirtz, J. L. Rodriguez-Sanchez, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Nuclear reaction, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, hypernucleus, Strangeness, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, nuclear reaction, Spectral line, Nuclear physics, strangeness, K: spectrum, 0103 physical sciences, medicine, Cluster (physics), 010306 general physics, Nuclear Experiment, cluster, intranuclear cascade, Physics, 010308 nuclear & particles physics, nucleus, nucleon, strange particle: production, Hypernucleus, medicine.anatomical_structure, Cascade, Nucleon, Nucleus
Abstract

International audience; Motivated by a renewed interest in studies of hypernuclei, the strangeness degree of freedom was implemented in the intranuclear cascade model INCL. This model takes care of the first stage of reactions between a nucleon (or a light cluster) and a nucleus at energies from a few tens of MeV up to a few GeV. After emission of fast particles, a hot remnant nucleus is produced and another model, combined to INCL, handles the de-excitation (the Abla model in our case). The main ingredients will be discussed and we will compare the results to experimental data. The experimental kaon spectra for different target elements and at different energies agree reasonable well with the model predictions. The main remaining discrepancies are analysed and will be explained.

Published
2018
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39. HEIR: A High-Energy Intra-Nuclear Cascade Liège-based Residual nuclear data library for simulation with FISPACT-II

Author

T. Stainer, Davide Mancusi, M. Fleming, J. Eastwood, J. C. David, Organisation de Coopération et de Développement Economiques (OCDE), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Organisation de Coopération et de Développement Economiques = Organisation for Economic Co-operation and Development (OCDE), and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Physics, Nuclear and High Energy Physics, Nuclear transmutation, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Inventory, Nuclear data, Activation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Residual, 01 natural sciences, Transmutation, Nuclear physics, Cascade, 0103 physical sciences, Nuclide, 010306 general physics, Instrumentation, Energy (signal processing)
Abstract

FISPACT-II is an advanced activation/transmutation and inventory code that employs the most up-to-date and sophisticated nuclear data forms, including the full TENDL-2017 library. TENDL includes residual nuclide production for incident particle energies up to 200 MeV. To address the needs of activation–transmutation simulation in incident-particle fields with energies up to and above 1 GeV, FISPACT-II has been extended to splice TENDL standard ENDF-6 nuclear data with extended nuclear data forms. Comparisons between JENDL-2007/HE, HEAD-2009, and the most recent intra-nuclear cascade models found within Geant4 led to an updated method for residual nuclide nuclear data production. This has been achieved with an automated INCL++/ABLA process that produces complete residual cross section format ( MF=10 ) for activation/transmutation and inventory calculations. The current High-Energy Intra-Nuclear Cascade Liege-based Residual (HEIR-0.1) library includes proton-induced cross sections up to 1 GeV for 2095 targets. These data are available with the most recent release 4.0 of FISPACT-II .

Published
2018
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40. Parametrization of cross sections for elementary hadronic collisions involving strange particles

Author

Davide Mancusi, Sylvie Leray, A. Boudard, Ingo Leya, Joseph Cugnon, Jason Hirtz, J.-C. David, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées ( SERMA ), Département de Modélisation des Systèmes et Structures ( DM2S ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Quark, Strange quark, Particle physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, Feynman graph, Hadron, hypernucleus, cross section: parametrization, General Physics and Astronomy, FOS: Physical sciences, Strangeness, 01 natural sciences, String (physics), Nuclear Theory (nucl-th), strangeness, Pion, 0103 physical sciences, string model, 010306 general physics, Nuclear Experiment, intranuclear cascade, hadron hadron: interaction, [ PHYS.NUCL ] Physics [physics]/Nuclear Theory [nucl-th], total cross section, Fluid Flow and Transfer Processes, Physics, energy: high, 010308 nuclear & particles physics, 520 Astronomy, PANDA, J-PARC Lab, strange particle: production, Hyperon, model: hadronic, 620 Engineering, charged particle, Clebsch-Gordan coefficients, Gluon, isospin: symmetry, Jefferson Lab
Abstract

International audience; The production of strange particles (kaons, hyperons) and hypernuclei in light charged-particle-induced reactions in the energy range of a few GeV (2-15 GeV) has become a topic of active research in several facilities (e.g., HypHI and PANDA at GSI and/or FAIR (Germany), JLab (USA), and JPARC (Japan)). This energy range represents the low-energy limit of the string models (degree of freedom: quark and gluon) or the high-energy limit of the so-called spallation models (degree of freedom: hadrons). A well-known spallation model is INCL, the Liège intranuclear cascade model (combined with a de-excitation model to complete the reaction). INCL, known to give good results up to 2-3GeV, was recently upgraded by the implementation of multiple pion emission to extend the energy range of applicability up to roughly 15GeV. The next step, to account also for strange particle production, both for refining the high-energy domain and making it usable when strangeness appears, requires the following main ingredients: i) the relevant elementary cross sections (production, scattering, and absorption) and ii) the characteristics of the associated final states. Some of those ingredients are already known and, sometimes, already used in models of the same type (e.g., Bertini, GiBUU), but this paper aims at reviewing the situation by compiling, updating, and comparing the necessary elementary information which are independent of the model used.

Published
2018
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41. Constraining statistical-model parameters using fusion and spallation reactions

Author

Charity Robert J., Mancusi Davide, and Cugnon Joseph

Subjects
Physics, QC1-999
Abstract

The de-excitation of compound nuclei has been successfully described for several decades by means of statistical models. However, such models involve a large number of free parameters and ingredients that are often underconstrained by experimental data. We show how the degeneracy of the model ingredients can be partially lifted by studying different entrance channels for de-excitation, which populate different regions of the parameter space of the compound nucleus. Fusion reactions, in particular, play an important role in this strategy because they fix three out of four of the compound-nucleus parameters (mass, charge and total excitation energy). The present work focuses on fission and intermediate-mass-fragment emission cross sections. We prove how equivalent parameter sets for fusion-fission reactions can be resolved using another entrance channel, namely spallation reactions. Intermediate-mass-fragment emission can be constrained in a similar way. An interpretation of the best-fit IMF barriers in terms of the Wigner energies of the nascent fragments is discussed.

Published
2011
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42. Stability analysis of stratified Rayleigh–Bénard–Poiseuille convection: Influence of the shear flow

Author

Selene M.A. Guelli U. de Souza, Antônio Augusto Ulson de Souza, Erasmo Mancusi, and Éliton Fontana

Subjects
Convection, Physics, Hydrodynamic stability, Natural convection, Applied Mathematics, General Chemical Engineering, Thermodynamics, General Chemistry, Rayleigh number, Mechanics, Hagen–Poiseuille equation, Industrial and Manufacturing Engineering, Physics::Fluid Dynamics, Combined forced and natural convection, Rayleigh–Bénard convection, Convection cell
Abstract

The presence of horizontal flow in stratified systems where a vertical temperature gradient leads to heat transfer through natural convection can be observed in several technological and natural phenomena. In the study reported herein, a linear stability analysis using normal modes and the direct simulation of the governing equations using CFD techniques are applied to investigate the influence of the horizontal flow intensity on the onset of natural convection in a double-layer system heated from below. The results obtained with the two methodologies are in good agreement and complement each other, since, while linear analysis is suitable for defining the critical Rayleigh values, direct simulations allow a detailed analysis of the flow field when the convective motion is fully developed. Due to the large number of phenomena governing the system stability, this study focuses on a part of the spectrum of parameters selected to allow the determination of the minimum values that the Rayleigh number must achieve in order to make natural convection possible. The aim of the study is to gain a better understanding of some basic characteristics of the flow, such as the influence of the boundary conditions and the most common ways in which the convective cells can develop. The results are consistent with previously published data for double-layer Rayleigh–Benard and single-layer Rayleigh–Benard–Poiseuille convection. However, the existence of different modes that can make the system unstable creates a more complex scenario for some intervals of the governing parameters.

Published
2015
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43. Recent developments in Geant4

Author

Vladimir Grichine, Sebastien Incerti, G.O. Depaola, A. Galoyan, Andrea Dotti, Maria A.M. Reis, T. Yamashita, Enrico Bagli, Davide Mancusi, Ziad Francis, Helmut Burkhardt, J. I. Shin, Pekka Kaitaniemi, K. Amako, Tatsumi Koi, M. Raine, Pedro Arce, Ivan Petrović, John Allison, Nicolas A. Karakatsanis, D. Sawkey, Alexey Bogdanov, Victor Daniel Elvira, Giovanni Santin, X. Dong, Douglas Wright, M.H. Kelsey, S. Y. Jun, Maria Grazia Pia, K. Murakami, P. Gumplinger, S. B. Lee, Makoto Asai, J Perl, Jerome Verbeke, V. V. Uzhinsky, S. Hwang, J. M. Quesada, D. Brandt, Vladimir Ivanchenko, L. Garnier, Giorgio Ivan Russo, A. Mantero, Alexander Bagulya, Francesco Longo, B. Morgan, G. Barrand, Susanna Guatelli, T. Nikitina, Igor Strakovsky, H.N. Tran, Francesco Romano, B. R. Beck, Sw. Banerjee, D. Cano-Ott, M. Gayer, F.W. Jones, Ph Canal, Luciano Pandola, Paul Gueye, Toshiyuki Toshito, M. A. Cortés-Giraldo, Kyung-Suk Cho, Tsukasa Aso, A. Ristic Fira, Alexander Howard, G. Cosmo, Gunter Folger, John Apostolakis, Hisaya Kurashige, Giacomo Cuttone, Ivana Hřivnáčová, B. Tome, E. Mendoza, Stephane Chauvie, M. Karamitrosi, A. Taborda, Gene Cooperman, Satoshi Tanaka, H. Wenzel, B. Wendt, K. Genser, Takashi Sasaki, D. H. Wright, Pete Truscott, L. Urbán, Alberto Ribon, M. Verderi, P. Paprocki, M. Maire, A. Ivanchenko, Akinori Kimura, W. Pokorski, H. Yoshida, Jeremy M. C. Brown, A. Lechner, G.A.P. Cirrone, J. Yarba, Laurent Desorgher, Laboratoire de l'Accélérateur Linéaire (LAL), 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), Institut de Physique Nucléaire d'Orsay (IPNO), 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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), Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Allison, J., Amako, K., Apostolakis, J., Arce, P., Asai, M., Aso, T., Bagli, E., Bagulya, A., Banerjee, S., Barrand, G., Beck, B. R., Bogdanov, A. G., Brandt, D., Brown, J. M. C., Burkhardt, H., Canal, Ph., Cano-Ott, D., Chauvie, S., Cho, K., Cirrone, G. A. P., Cooperman, G., Cortés-Giraldo, M. A., Cosmo, G., Cuttone, G., Depaola, G., Desorgher, L., Dong, X., Dotti, A., Elvira, V. D., Folger, G., Francis, Z., Galoyan, A., Garnier, L., Gayer, M., Genser, K. L., Grichine, V. M., Guatelli, S., Guãye, P., Gumplinger, P., Howard, A. S., Hřivnã¡čovã¡, I., Hwang, S., Incerti, S., Ivanchenko, A., Ivanchenko, V. N., Jones, F. W., Jun, S. Y., Kaitaniemi, P., Karakatsanis, N., Karamitrosi, M., Kelsey, M., Kimura, A., Koi, T., Kurashige, H., Lechner, A., Lee, S. B., Longo, F., Maire, M., Mancusi, D., Mantero, A., Mendoza, E., Morgan, B., Murakami, K., Nikitina, T., Pandola, L., Paprocki, P., Perl, J., Petrović, I., Pia, M. G., Pokorski, W., Quesada, J. M., Raine, M., Reis, M. A., Ribon, A., Ristić Fira, A., Romano, F., Russo, G., Santin, G., Sasaki, T., Sawkey, D., Shin, J. I., Strakovsky, I. I., Taborda, A., Tanaka, S., Tomã©, B., Toshito, T., Tran, H. N., Truscott, P. R., Urban, L., Uzhinsky, V., Verbeke, J. M., Verderi, M., Wendt, B. L., Wenzel, H., Wright, D. H., Wright, D. M., Yamashita, T., Yarba, J., and Yoshida, H.

Subjects
MONTE-CARLO DOSIMETRY, LIQUID WATER, Nuclear and High Energy Physics, Exploit, PAIR PRODUCTION, MODELS, Nuclear physics, ENERGY ELECTROMAGNETIC, HEAVY-ION COLLISIONS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, QA76, 030218 nuclear medicine & medical imaging, High energy physic, 03 medical and health sciences, 0302 clinical medicine, Software, HADRON-NUCLEUS, 0103 physical sciences, PHYSICS PROCESSES, Statistical physics, High energy physics, Adaptation (computer science), Instrumentation, QC, Computing, Radiation, Simulation, ComputingMilieux_MISCELLANEOUS, Nuclear and High Energy Physic, Physics, Physics::Computational Physics, 010308 nuclear & particles physics, business.industry, Detector, NUCLEUS CROSS-SECTIONS, SPACE EVENT GENERATOR, Variety (cybernetics), Visualization, Computing and Computers, MICRODOSIMETRY SIMULATION, Nuclear physic, Multithreading, Nuclear Physics - Theory, Systems engineering, Space Science, business
Abstract

Geant4 is a software toolkit for the simulation of the passage of particles through matter. It is used by a large number of experiments and projects in a variety of application domains, including high energy physics, astrophysics and space science, medical physics and radiation protection. Over the past several years, major changes have been made to the toolkit in order to accommodate the needs of these user communities, and to efficiently exploit the growth of computing power made available by advances in technology. The adaptation of Geant4 to multithreading, advances in physics, detector modeling and visualization, extensions to the toolkit, including biasing and reverse Monte Carlo, and tools for physics and release validation are discussed here., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 835, ISSN:0168-9002, ISSN:1872-9576

Published
2016
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44. Geant4 simulation of the n_TOF-EAR2 neutron beam: Characteristics and prospects

Author

M. A. Cortés-Giraldo, J. Lerendegui-Marco, Carlos Guerrero, Mario Barbagallo, Davide Mancusi, F. Mingrone, Nicola Colonna, S. Lo Meo, M. Sabaté-Gilarte, V. Vlachoudis, Cristian Massimi, J. M. Quesada, G. Vannini, Lo Meo, S., Lerendegui-Marco, J., Guerrero, C., Cortés-Giraldo, M. A., Massimi, C., Quesada, J. M., Barbagallo, M., Colonna, N., Mancusi, D., Mingrone, F., Sabaté-Gilarte, M., Vannini, G., and Vlachoudis, V.

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Neutron radiation, 01 natural sciences, Spectral line, Monte Carlo simulation, neutron source, time-of-flight, Nuclear physics, Radiation flux, Beamline, Neutron flux, 0103 physical sciences, Nuclear fusion, Physics::Accelerator Physics, Neutron, 010306 general physics, Nuclear Experiment, Background radiation
Abstract

The characteristics of the neutron beam at the new n_TOF-EAR2 facility have been simulated with the Geant4 code with the aim of providing useful data for both the analysis and planning of the upcoming measurements. The spatial and energy distributions of the neutrons, the resolution function and the in-beam $ \gamma$ -ray background have been studied in detail and their implications in the forthcoming experiments have been discussed. The results confirm that, with this new short (18.5m flight path) beam line, reaching an instantaneous neutron flux beyond 105n/μs/pulse in the keV region, n_TOF is one of the few facilities where challenging measurements can be performed, involving in particular short-lived radioisotopes.

Published
2016
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45. Excitation of baryon resonances in charge-exchange reactions of heavy nuclei

Author

Sylvie Leray, D. Mancusi, Joseph Cugnon, J.-C. David, A. Boudard, J. L. Rodriguez-Sanchez, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), and Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA)

Subjects
Physics, History, Proton, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Nuclear Theory, Neutron density, 01 natural sciences, Computer Science Applications, Education, Baryon, Nuclear physics, 0103 physical sciences, Spallation, 010306 general physics, Nuclear Experiment, Excitation, Charge exchange
Abstract

International audience; The Liège intranuclear-cascade model (INCL) has been improved using a refined description of the matter and energy densities in the nuclear surface. Hartree-Fock-Bogoliubov calculations with the Skyrme interaction were used to obtain a more realistic description of the proton and neutron density profiles. We find that the new approach, together with a realistic modeling of the de-excitation process of the nuclear pre-fragments, improves the description of the production cross sections of the heaviest nuclear residues produced by charge-exchange processes in spallation reactions, where the excitation of baryonic resonances plays an important role.

Published
2017
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46. Superconducting Vortex‐Antivortex Pairs: Nucleation and Confinement in Magnetically Coupled Superconductor‐Ferromagnet Hybrids

Author

Cinzia Di Giorgio, Domenico D'Agostino, Anna Maria Cucolo, Maria Iavarone, Alessandro Scarfato, Goran Karapetrov, Steven Alan Moore, Massimiliano Polichetti, Davide Mancusi, Sandro Pace, Valentyn Novosad, Volodymir Yefremenko, and Fabrizio Bobba

Subjects
Superconductivity, Physics, magnetic flux vortices, magnetic properties, superconductor/ferromagnet heterostructures, Flux pinning, Ferromagnetism, Condensed matter physics, Nucleation, Inductive coupling, Vortex
Published
2017
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47. Validation of Geant4 fragmentation for Heavy Ion Therapy

Author

F. Romano, Sebastien Incerti, Davide Mancusi, Anatoly B. Rosenfeld, Giacomo Cuttone, G.A.P. Cirrone, Gunter Folger, Vladimir Ivanchenko, Susanna Guatelli, Tatsumi Koi, Luciano Pandola, David Bolst, 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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
Physics, Nuclear and High Energy Physics, Ion beam, Monte Carlo method, Geant4, Bragg peak, Heavy ion therapy, Kinetic energy, 030218 nuclear medicine & medical imaging, Ion, Nuclear physics, 03 medical and health sciences, Benchmarking, 0302 clinical medicine, Fragmentation (mass spectrometry), Cascade, 030220 oncology & carcinogenesis, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], SIMULATION, Relative biological effectiveness, Nuclear Experiment, Instrumentation
Abstract

International audience; $^{12}$C ion therapy has had growing interest in recent years for its excellent dose conformity. However at therapeutic energies, which can be as high as 400 MeV/u, carbon ions produce secondary fragments. For an incident 400 MeV/u 12C ion beam, $\sim 70 \%$ of the beam will undergo fragmentation before the Bragg Peak. The dosimetric and radiobiological impact of these fragments must be accurately characterised, as it can result in increasing the risk of secondary cancer for the patient as well as altering the relative biological effectiveness. This work investigates the accuracy of three different nuclear fragmentation models available in the Monte Carlo Toolkit Geant4, the Binary Intranuclear Cascade (BIC), the Quantum Molecular Dynamics (QMD) and the Liege Intranuclear Cascade (INCL++). The models were benchmarked against experimental data for a pristine 400 MeV/u $^{12}$C beam incident upon a water phantom, including fragment yield, angular and energy distribution. For fragment yields the three alternative models agreed between $\sim 5$ and $\sim 35 \%$ with experimental measurements, the QMD using the “Frag” option gave the best agreement for lighter fragments but had reduced agreement for larger fragments. For angular distributions INCL++ was seen to provide the best agreement among the models for all elements with the exception of Hydrogen, while BIC and QMD was seen to produce broader distributions compared to experiment. BIC and QMD performed similar to one another for kinetic energy distributions while INCL++ suffered from producing lower energy distributions compared to the other models and experiment.

Published
2017
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48. Improvement of one-nucleon removal and total reaction cross sections in the Liège intranuclear-cascade model using Hartree-Fock-Bogoliubov calculations

Author

Davide Mancusi, Sylvie Leray, A. Boudard, Joseph Cugnon, J.-C. David, J. L. Rodriguez-Sanchez, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA), CEA-Direction de l'Energie Nucléaire (CEA-DEN), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN)

Subjects
Physics, Range (particle radiation), [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Projectile, Nuclear Theory, Hartree–Fock method, Observable, Kinetic energy, 01 natural sciences, 7. Clean energy, Nuclear physics, Cascade, 0103 physical sciences, Neutron, 010306 general physics, Nucleon, Nuclear Experiment
Abstract

International audience; The prediction of one-nucleon-removal cross sections by the Liège intranuclear-cascade model has been improved using a refined description of the matter and energy densities in the nuclear surface. Hartree-Fock-Bogoliubov calculations with the Skyrme interaction are used to obtain a more realistic description of the radial-density distributions of protons and neutrons, as well as the excitation-energy uncorrelation at the nuclear surface due to quantum effects and short-range correlations. The results are compared with experimental data covering a large range of nuclei, from carbon to uranium, and projectile kinetic energies. We find that the new approach is in good agreement with experimental data of one-nucleon-removal cross sections covering a broad range in nuclei and energies. The new ingredients also improve the description of total reaction cross sections induced by protons at low energies, the production cross sections of heaviest residues close to the projectile, and the triple-differential cross sections for one-proton removal. However, other observables such as quadruple-differential cross sections of coincident protons do not present any sizable sensitivity to the new approach. Finally, the model is also tested for light-ion-induced reactions. It is shown that the new parameters can give a reasonable description of the nucleus-nucleus total reaction cross sections at high energies.

Published
2017
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49. Detection of the flux dynamical regimes in Bi 4 O 4 S 3 by multiharmonic AC susceptibility

Author

Sandro Pace, Filippo Giubileo, Yoshikazu Mizuguchi, D Mancusi, and Massimiliano Polichetti

Subjects
Physics, Superconductivity, Flux pinning, Condensed matter physics, Field (physics), superconductivity, Transition temperature, Energy Engineering and Power Technology, Flux, Condensed Matter Physics, Magnetic susceptibility, Power law, Electronic, Optical and Magnetic Materials, Vortex dymamics, Amplitude, harmonics, ac susceptility, magnetic properties, Electrical and Electronic Engineering
Abstract

The temperature dependent first and third harmonics of the AC magnetic susceptibility χ 1,3 ( T ) have been measured on Bi 4 O 4 S 3 . The χ 1 ( T ) magnetic response is due to the intergranular contribution with a transition temperature T c ≈ 4.4 K. The dependencies of the χ 3 ( T ) on the AC field amplitude and frequency reveal a critical state with the presence of the flux creep and the flux flow regimes. In fact, the field dependencies of the effective activation energy and of the frequency dependent critical current density have been found to be described with power laws characteristic of the collective creep regime involving large flux bundles.

Published
2014
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50. Recent Developments of the Liège Intranuclear Cascade Model in View of its Use into High-energy Transport Codes

Author

Davide Mancusi, J.-C. David, Joseph Cugnon, B. Braunn, A. Boudard, A. Leprince, and S. Leray

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, High energy, Cascade, Nuclear data, Spallation, Domain (software engineering)
Abstract

Recent extensions of the Liege Intranuclear Cascade model, INCL, at energies below 100 MeV and for light-ion (up to oxygen) induced reactions are reported. Comparisons with relevant experimental data are shown. The model has been implemented into several high-energy transport codes allowing simulations in a wide domain of applications. Examples of simulations performed for spallation targets with the model implemented into MCNPX and in the domain of medical applications with GEANT4 are presented.

Published
2014
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