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M. Eloi Le Quilleuc (CEA IRFU/SPP)09/05/2016 14:30I am a 2nd year PhD student working in the ATLAS experiment at Cern. In this collaboration, I mainly contributed to the identification of b-jets. I optimized the reconstruction of secondary vertices at high jet momentum, improved the recognition of B-hadron vertices against V0 vertices, and brought some corrections to a Boosted Decision Tree algorithm (that combines b-tagging informations into...Aller à la page de la contribution
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M. jeremy hebinger (lal)09/05/2016 14:45In rare B mesons decay such as $b \to s\gamma$, standard model predictions indicate that the photon should be mostly left-handed. And since the GIM mechanism allows this process to only occurs through loops, measurements of the photon polarisation can provide a good test of the standard model. Indeed, if new physics heavy particles contribute to the process the photon polarisation may change....Aller à la page de la contribution
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M. Renato Quagliani (LAL Orsay and Bristol University)09/05/2016 15:00The project of the LHCb upgraded detector foresees the presence of a scintillating fiber tracker (SciFi) for the LHC run III starting in 2020. We will describe the design and the performances of the newly developed algorithm used for the reconstruction of stand-alone tracks in the SciFi, called Hybrid Seeding. The B mesons double charm decays have been introduced to explain the discrepancy...Aller à la page de la contribution
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M. Christophe Goudet (LAL)09/05/2016 15:15The run 2 of the LHC starts an era of precision measurement in the Higgs sector which may be a portal to Beyond Standard Model physics. To be sensitive to BSM, an improvement of the systematics is necessary. The final step of the electron energy correction, which is part of the dominant experimental uncertainties, uses a data driven technique to calibrate the energy of...Aller à la page de la contribution
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Mme Amélie Rouchon (Cea Saclay)09/05/2016 15:30Traditional neutron noise analysis addresses the description of small time-dependent flux fluctuations induced by small global or local periodic perturbations of the macroscopic cross sections, which may occur in nuclear reactors due to stochastic density fluctuations of the coolant, to vibrations of fuel elements, control rods, or any other structures in the core. Neutron noise techniques are...Aller à la page de la contribution
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M. Walter PESSOA (LETI CEA-Grenoble)09/05/2016 15:30Chalcogenide materials (based in S, Se and Te) have unique electrical and optical properties; they have the ability to change from amorphous to crystalline phase when an electric current is applied. This phenomenon makes them a reference in new applications such as electronic memories (Phase Change RAM and Conductive Bridge RAM) and in optronics (Photonics and photovoltaics applications). In...Aller à la page de la contribution
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M. Nabil Chouika (Irfu/SPhN - CEA Saclay)09/05/2016 15:30The extraction of GPDs (Generalized Parton Distributions, that encode information about the correlation between longitudinal momentum and transverse position of the quarks and gluons inside the hadron) is one of the main challenges of Hadronic Physics nowadays. In parallel, the need to produce accurate models in the valence region (relevant for JLab kinematics for example) is important. The...Aller à la page de la contribution
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M. Cheikh Fall Ndiaye (LAL)09/05/2016 15:30Accelerator PhysicsIn the context of the R&D program of the EuroGammaS consortium, a collaboration between different academic and industry partners for the Nuclear Physics pillar of the European project Extreme Light Infrastructure (ELI-NP), two multipass $\gamma$-ray Compton machines are to be built in Măgurele, Romania with photons of tunable energy between $0.2~\mathrm{MeV}$ and up to $20~\mathrm{MeV}$. These...Aller à la page de la contribution
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M. Jonathan Riffaud (CEA/DRT/LIST/DM2I/LNHB)09/05/2016 15:30Dosimetry in reactor aims to determine the neutron fluence received during an irradiation and to characterize the spectrum (energy distribution of neutrons). This technique is based on the analysis of the activity of irradiated dosimeters, such as Nb-93(n,)Nb-93m and Rh-103(n,)Rh-103m with energies emissions between 16 and 22 keV. The activity measurement of these dosimeters is...Aller à la page de la contribution
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M. Florian BRULFERT (IPN)09/05/2016 15:30Considering the environmental impact of the Fukushima nuclear accident, it is fundamental to study the mechanisms governing the effects of the released radionuclides on the biosphere and thus identify the molecular processes generating the transport and deposition of actinides, such as neptunium and uranium. However, the information about the microscopic aspect of the interaction between...Aller à la page de la contribution
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M. Xing LIU (LAL)09/05/2016 15:30A new method of laser frequency stabilization using polarization property of an optical cavity is proposed. In a standard Fabry–Perot cavity, the coating layers thickness of cavity mirrors is calculated to obtain the same phase shift for s- and p wave but a slight detuning from the nominal thickness can produce s- and p wave phase detuning. As a result, each wave accumulates a different...Aller à la page de la contribution
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Mlle Delphine Boursette (LAL)09/05/2016 15:30The SoLid experiment is searching for sterile neutrinos from a nuclear research reactor. It looks for inverse beta decays (a positron and a neutron in delayed coincidence) with a very segmented detector made of thousands of scintillating cubes. SoLid has a very innovative hybrid technology with 2 different scintillators. The cubes are made of Polyvynil-Toluene (PVT) to detect the...Aller à la page de la contribution
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M. Xavier Nuel Gavaldà (Synchtron SOLEIL)09/05/2016 15:30The aim of this project is to optimize the nonlinear beam dynamics of the Synchrotron SOLEIL storage ring using Multi-objective Genetic Algorithm (MOGA). MOGA uses ELEGANT as a tracking code to compute the on- and off-momentum acceptances as optimization objectives and the quadrupole and sextupole setting magnets as optimization variables. The off- and on-momentum acceptances are strongly...Aller à la page de la contribution
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M. Themistoklis Williams (LAL)09/05/2016 15:30For the first time, a diamond sensor was operated for the characterisation of a high average-intensity gamma-ray beam. Data was collected for gamma beam energies between 2 and 7 MeV, at the HI$\gamma$S facility of TUNL. The nanosecond-fast resolution of diamond detectors is exploited to distinguish bunches of gamma rays 16.8 ns apart. It allows a precise direct determination of the...Aller à la page de la contribution
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Mlle Liss Vazquez Rodriguez (PhD)09/05/2016 15:30The hyperfine structure splitting (hfs) and isotope shifts (IS) in the atomic transitions 4d10 5s 2S1/2 – 4d10 5p 2P3/2 will be measured for the isotopes 111-120Ag. The technique of choice will be collinear laser spectroscopy. A continuous-wave laser beam will be overlapped with the radioactive beam and at a precise set of laser frequencies the atoms fluoresce in the transitions of their...Aller à la page de la contribution
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Mlle Coline Larmier (CEA DEN-DANS)09/05/2016 15:30In the context of reactor physics, the simulation of the transport of neutrons and photons (which obeys the Boltzmann equation) is based on deterministic or stochastic methods. The stochastic approach resorts to Monte Carlo codes, such as TRIPOLI-4®. Developed by the CEA, this code is used for criticality, shielding and nuclear instrumentation. In this context, the random walks of the...Aller à la page de la contribution
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M. Adrien Stolidi (CEA)09/05/2016 15:30X-ray phase contrast imaging, in addition to classical attenuation imaging, has a lot of interest due to its high differentiation capability for low density materials. However, despite classical radiography, phase signal has to be retrieved by adding experimental material and/or applying sophisticated phase retrieval algorithm [1]. Best performances are achieved on synchrotron source but in...Aller à la page de la contribution
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Maxime Mougeot (CSNSM)09/05/2016 15:30Due to the inherent relationship with the binding energy, nuclear masses hold a fingerprint of the interactions taking place within a given nucleus. Small as it is, about one percent of the total mass of the system, the binding energy can give precious information on such phenomena as nuclear shell effects and deformation, especially on the way they evolve far from stability. The...Aller à la page de la contribution
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M. Mathias Pierre (LPT Orsay)09/05/2016 15:30We investigate a simple setup in which an excess in the di-photon invariant mass distribution around $750$ GeV, as seen by the ATLAS and CMS collaborations, is originated through a pair of collimated photon pairs. In this framework a scalar state $s$ decays into two light pseudo-Goldstone bosons $a$, each of which subsequently decays into a pair of collimated photons which are...Aller à la page de la contribution
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Mlle Yiman YAN (IPN Orsay)09/05/2016 15:30A precise description of fission is essential for reactor safety, to assess the feasibility of waste transmutation and for the design of a next generation of reactors. However, despite a long history of work, the theoretical description of nuclear fission - one of the most complex processes on the nuclear scale - is still far from complete. In addition, information of fission of exotic...Aller à la page de la contribution
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Mlle Anastasia Georgiadou (IPN)09/05/2016 15:30In the present work, the study of transfer reactions in 56 Ni is presented. The study is focusing in the neutron-proton pairing, which is a local interaction inside the nucleus. In addition with the mean field potential in the nucleus pairing induces correlations. There are two channels for pairing, one with isospin T=1 (isovector) and the other with isospin T=0 (isoscalar), in...Aller à la page de la contribution
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Mme Tasneem Rashid (Laboratoire de l'Accelerateur Linéaire (LAL) - Université Paris Sud XI)09/05/2016 15:30Active edge planar pixel sensors are promising candidates to instrument the inner layers of the new ATLAS pixel detector for HL-LHC, thanks to its radiation tolerant properties and the increased fraction of active area due to a distance as low as 50 µm between the last pixel implants and the activated edge . This poster addresses the study of the electrical characterization of active edge...Aller à la page de la contribution
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M. Liqiang QI (IPN NESTER)09/05/2016 15:30Presented here is my work on the study of prompt gamma emission in the fission mechanism. From a nuclear reactor physics point of view, it addresses the gamma heating issue in nuclear reactor cores. On the other hand, gamma emission can help understand the fission process in terms of fundamental physics. Results from experiments in 2016 at ALTO(Linear Accelerator and Tandem Orsay) by using the...Aller à la page de la contribution
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M. Michal Rapala (CEA Saclay)09/05/2016 15:30My PhD is done in cooperation between the SPHN at CEA Saclay and the SPRC at Cadarache. It consists in the study of the fission process and the deexcitation of the fission fragments. The first step is the analysis of an experimental campaign performed in 2012 at ILL in Grenoble (EXILL), in which a U-235 and a Pu-241 target were irradiated by a beam of cold neutrons. A unique feature of the...Aller à la page de la contribution
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M. Victor Renaudin (LAL)09/05/2016 15:30Semileptonic B decays with a $\tau$-lepton are a very interesting tool to probe the Physics beyond Standard Model. Besides its precise theoretical predictions due to lepton flavor universality it has been a hot topic since the evidence of a slight disagreement between BaBar, Belle and LHCb measurements and the SM expected value of $R(D^{*})$. This gives us a chance to detect the presence of...Aller à la page de la contribution
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M. Clément Chevillard (Medical physics department, Institute Curie/ Paris/ France ; R&D Medical Physics, DOSIsoft/Cachan/France)09/05/2016 15:30In vivo dosimetry consists in measuring in real time, during one or several treatment sessions, the dose actually received by the patient1Many researchers in the past year have improved methods to verify the correct dose delivery in the patient1. A simple method to determineIn the last 10 years the dose received by the patient during his treatment is to usehas been measured by an Electronic...Aller à la page de la contribution
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Maud airiau (IPN)09/05/2016 15:30Fission barriers of a few MeV induced by shell effects are predicted using macroscopic-microscopic structure model leading to the formation of the so-called island of stability for super heavy nuclei. Its position should be centered around new magic numbers expected at N=184, and between Z=114 and Z=126 depending on the model used for calculation. Super heavy nuclei are synthesised by...Aller à la page de la contribution
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M. Abdullah ABUDRA'A (CEA)09/05/2016 17:00Contact radiotherapy by X-Rays generator is a cancer treatment technique using low energy X-Rays (≤ 50 keV). This technique became more reliable after the latest evolutions of the X-Ray tubes, and hence, led to the development of new treatment devices, such as INTRABEAM® and Papillon 50®. The irradiation is done in contact with the tumor so it receives a high dose while preserving neighboring...Aller à la page de la contribution
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Mme Alice Somaini (doctorante)09/05/2016 17:15Monte Carlo codes are often used in nuclear reactor simulations to realize fuel evolutions as a function of time, in order to know the spent fuel composition at the end of the irradiation cycle. The evolution of the entire reactor core is not possible with stochastic codes, because of the source convergence problem and the too costly machine time required. So, a simple reactor model is...Aller à la page de la contribution
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Mlle Yara Haddad (CSNSM, Univ Paris-Sud)09/05/2016 17:30This Ph.D. study is concerned with the UO2 nuclear spent fuel. A high burnup structure (HBS, also so-called rim structure) is observed with a typical thickness of 100 to 200 µm at the peripheral region of the nuclear fuel pellets. Several observations and characterizations are notable in that zone [1-5]: 1- An increase of Pu content and burnup. 2- The development of fission gas pores...Aller à la page de la contribution
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M. Mathieu Muniglia (CEA)09/05/2016 17:45In the actual context of energetic transition, the increase of the renewable energies contribution (as wind farms, solar energy, or biomass) is a major issue. For example, the part of intermittent renewable energies is forecast to be around 30% of the total production in 2030, against 6% today. On the other hand, their intermittent production may lead to an important imbalance between...Aller à la page de la contribution
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Mlle Gabriela DURAN-KLIE (IPNO)09/05/2016 18:00The molten salt fast reactor (MSFR) is an innovating concept of the molten salt reactor (MSR) developed by CNRS (France) since 2004. This reactor is designed for the use of a liquid nuclear adapted to work under Thorium fuel cycle (Th232-U233). The nuclear fuel retained for the MSFR will be composed for the fluoride molten salt mixture, LiF-ThF4-(UF4-UF3) (77–19–4) mol%. A current subject in...Aller à la page de la contribution
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Mlle Jana Crkovska (IPN Orsay)10/05/2016 10:15Collision of relativistic heavy ions produce a hot and dense matter constituted of deconfined quarks and gluons - the Quark-Gluon Plasma (QGP). Heavy quarks present a unique probe of QGP properties as, due to their large mass, they are created in the initial hard-scattering processes during the first stages of the collision. Hence they experience the whole evolution of the system. Measurements...Aller à la page de la contribution
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Mlle Coralie Luchini (IPN Orsay)10/05/2016 10:15The application of nuclear technology in industry, research and medicine leads to the production of radionuclides that are likely to cause environmental pollution or internal contamination (through inhalation, ingestion or wound) of nuclear workers and/or public. Indeed, contaminations are present in the surroundings of uranium mining sites, radwaste disposal facilities, or after accidental...Aller à la page de la contribution
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Mlle Kim-Khanh LE (IPNO)10/05/2016 10:15Concentrating solar power (CSP) systems which use concentrated sunlight to produce electricity by turning steam turbines have been receiving a lot of attention in recent years. However, as we all know, solar energy is a fluctuating resource because of the daily rotation of the earth, seasons and weather conditions. The challenge here is to store this energy and release it at the right time. An...Aller à la page de la contribution
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Mme Marharyta ALOKHINA (CEA/IRFU/SPP)10/05/2016 10:15Positron emission tomography (PET) is a powerful nuclear imaging technique used widely nowadays in oncology, cardiology and neuropsychiatry. The PET technology consists in injecting the patient with a radioactive tracer. The decay of the tracer emits a positron which annihilate with an electron. As a result of the annihilation, two 511 keV gamma quanta are emitted back-to-back and registered...Aller à la page de la contribution
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M. Renjun YANG (LAL)10/05/2016 10:15The Accelerator Test Facility (ATF), a prototype of final focus system for next generation of future linear collider, aims to focus the beams to nano-meter transverse size and providing 12 nm stability. Achieving these goals will require modeling, measurement and controlling of the transverse beam halo before interaction point (IP). This paper presents a experimental study of the distribution...Aller à la page de la contribution
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M. Clement Leloup (Irfu)10/05/2016 10:15The current standard models, both in particle physics and cosmology, have been largely validated experimentaly with an unprecedented precision to this day. Yet, these models are not able to answer several important questions of modern physics. Two of them concern the nature of Dark Energy and Dark Matter, that have been highlighted from astrophysical and cosmological observations. Several...Aller à la page de la contribution
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Mlle Clotilde Canot (Thésarde)10/05/2016 10:15Positron emission tomography (PET) is a nuclear imaging technique widely used in oncology. Decay of the tracer emits positrons, which annihilate in the nearby tissue. Two gamma quanta with the energy 511 keV are produced by positron annihilation and allow one to reconstruct the annihilation vertex and distribution of the tracer activity in the body of the patient. The time-of-flight (TOF)...Aller à la page de la contribution
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M. Jean-Baptiste Durrive (Institut d'Astrophysique Spatiale)10/05/2016 10:15Cosmological numerical simulations suggest that the Universe has a web-like structure, the nodes of which are galaxy clusters. These clusters are supplied with matter by gas flowing along the filaments interconnecting them. Part of this accretion occurs intermittently, which indicates that dense clumps of matter do not only form inside clusters themselves, but also either in voids, walls...Aller à la page de la contribution
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Mlle Alice Defresne (CSNSM)10/05/2016 10:15a-Si:H/c-Si heterojunction solar cells have reached record efficiencies of 24.7% (22% in industry) [1]. The passivation of c-Si in silicon heterojunction solar cells is the key to achieve a high-efficiency. The abrupt discontinuity in the crystal structure at the amorphous/crystal interface induces a high density of dangling bonds, thus creating a large density of defects induced energy levels...Aller à la page de la contribution
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Michel Nowak (CEA)10/05/2016 10:15Reference shielding calculations are usually performed with Monte Carlo codes. When simulating rare events with Monte Carlo methods, it is necessary to use variance reduction techniques to reduce the statistical uncertainty on the expected result. Most of these techniques require a prior knowledge of the problem in the form of a so-called importance map, which represents the average...Aller à la page de la contribution
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M. Florent Scarpa (IPN Orsay - Paris-Sud U. - CNRS/IN2P3)10/05/2016 10:15Transverse Momentum Dependent (TMD) factorisation is a systematic method to account for transverse part of parton momentum inside hadrons. In this formalism, the partonic scattering amplitude ("short-distance part" evaluated with Feynman rules) remains unmodified. It is instead factorised with correlators containing the transverse dependence. TMD distributions are of great interest to...Aller à la page de la contribution
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Mlle Maíra Dutra (Laboratoire de Physique Théorique d'Orsay)10/05/2016 10:15For more than 80 years ago, the existence of a "dark" component in our Universe was proposed regarding astrophysical observations. Since that time, several other hints (rotation curves of the galaxies, bullet-cluster, measurement of the Cosmological Microwave Background) came to confirm this hypothesis. However, the situation seems today even less clear than ever. This is the consequence of...Aller à la page de la contribution
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M. hugues Paradis (IRSN)10/05/2016 10:15The laboratory of environmental radioactivity measurement performs around 2000 measurements per year by low level gamma ray spectrometry, either in the framework of the environmental surveillance in France handled by the IRSN, or for research or expertise purpose in the radioecology domain. In both cases the anthropogenic radioactivity in environment samples is measured at trace levels and...Aller à la page de la contribution
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Mlle Pauline Zarrouk (CEA-Saclay)10/05/2016 10:15The eBOSS multi-object spectrograph has undertaken a survey of Quasars (QSO) in the redshift range 0.9 < z < 2.2. It will measure the growth rate of structures from the Redshift Space Distortions (RSD) of the 2-point correlation function and allow for a test of general relativity modifications and dark energy scenarios. To perform this measurement, special care should be given to the RSD...Aller à la page de la contribution
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Mlle Héléna Chesneau (CEA)10/05/2016 10:15The accuracy of patient and tumor localization for radiotherapy treatments has been improved by the emergence of radiographic image guidance. However, intensive use of Imaged-Guided Radiotherapy (IGRT) could add a significant extra dose to normal tissues and potentially amplify the risk for patients to develop a secondary radiation-induced cancer and side effects. The purpose of this Ph.D...Aller à la page de la contribution
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M. Raphaël-David Lasseri (IPNO)10/05/2016 10:15Since the 50's the importance of quantum correlations to describe matter has been understood, first in atomic systems by Cooper and Froehlich and extended to Nuclei by Mott and Pines through an intuitive 'pair' models. In a first part i'll discuss a modern interpretation of this phenomena and some applications. In a second part I'll focus on more general type of correlations and possible...Aller à la page de la contribution
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Mohamad Ayoub (Physique des particules)10/05/2016 10:15Je suis en dernière année de thèse dans le groupe de recherche de Higgs en deux leptons taus dans ATLAS au laboratoire de l’accélérateur linéaire à Orsay. Durant ma 1ére année en 2013, j’ai travaillé dans le groupe de performance du lepton tau dans ATLAS et j’ai participé dans l’amélioration de la reconstruction et l’identification de ce lepton. Un lepton tau se désintegrent soit en canal...Aller à la page de la contribution
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Aurélie Bonhomme (CEA)10/05/2016 10:15Neutrino physics stays beyond the Standard Model. If neutrino oscillation involving masses mixing between three neutrino flavours seems today a valid theory, there are some hints for other neutrino families. The "reactor neutrino anomaly" is one of them and puts forward a deficit of electronic antineutrinos at short distance. This deficit can be interpreted as the existence of a *sterile*...Aller à la page de la contribution
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M. Mathieu Lamoureux (CEA Saclay, IRFU)10/05/2016 10:15Neutrinos are the only matter particles in the Standard Model of particle physics that have only been observed with left handed chirality. If right handed neutrinos exist, they could be responsible for several phenomena that have no explanation within the Standard Model, including neutrino masses, the baryon asymmetry of the universe and dark matter. The Neutrino Minimal Standard Model...Aller à la page de la contribution
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M. Aurélien Soulié (DEN-Service de Recherches de Métallurgie Physique, CEA, Université Paris-Saclay, F-91191, Gif-sur-Yvette, France)10/05/2016 10:15Recent experimental studies on oxides crystallizing in the fluorite structures (UO2, CeO2 or cubic ZrO2) have shown that under MeV electron irradiations, some atypic extended defects can be created in these materials. Faulted non-stoichiometric dislocation loops (disk-shaped interstitial oxygen layers) have already been seen. These observations raise the question about the point defect...Aller à la page de la contribution
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M. Clément DELAFOSSE (IPNO)10/05/2016 10:15Recent experimental discoveries have revealed that the neutron effective single particle evolution above $^{78}$Ni shows peculiar and unpredicted behaviours. Our study us mainly focussed on the neutron $g_{7/2}$ effective single particle energy (ESPE) evolution towards $^{78}$Ni. This evolution should be driven by the same tensor mechanism which produces a quasi-degeneracy of the...Aller à la page de la contribution
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M. Florian Geslin (IPNO/Thales)10/05/2016 10:15Nowadays, the number of projects aiming at building high intensity proton linear accelerator is increasing thanks to a large field of applications: particles physics, nuclear physics, spallation source and some applications in material sciences, biology and nuclear waste reprocessing. All these linear accelerator projects are based on superconducting technology that allows high accelerating...Aller à la page de la contribution
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M. Andrei Angelescu (CNRS / Univ. Paris-Sud)10/05/2016 11:45The so-called "Hierarchy Problem" is one of the main driving forces behind the nowadays exploration of physics beyond the Standard Model (BSM). In its simplest form, the Hierarchy Problem asks why the weak interaction is $\sim 10^{30}$ times stronger than gravity. The goal of this presentation is to state the body of the problem in a precise yet accessible manner, with a particular...Aller à la page de la contribution
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M. Steven Calvez (Laboratoire de l'Accélérateur Linéaire)10/05/2016 12:00Particle PhysicsThe SuperNEMO experiment is looking for the neutrinoless double beta decay which, if observed, would prove the Majorana nature of the neutrino. Under the assumption neutrinos are indeed identical to their antiparticles, the detector could not only constrain the effective neutrino mass but also identify precisely the mechanism responsible for the neutrinoless double beta decay among the...Aller à la page de la contribution
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Mlle Amelia Maia Leite (Cea Saclay)10/05/2016 12:15The GBAR experiment will measure the free fall of antihydrogen to test the weak equivalence principle with antimatter. In order to produce this atom with a velocity of the order of 1 m/s, we will use an intermediate state, the H$^+$ ion, composed of an antiproton and two positrons. This ion can be slowed to such velocities and then neutralized by photo-detachment of the excess positron. Its...Aller à la page de la contribution
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M. Baptiste Abeloos (LAL)10/05/2016 12:30The supersymmetry is one of the most studied theory beyond the standard model. During the presentation, I will describe the research of supersymmetry (squarks and gluinos) with the ATLAS detector in the 0 lepton channel.Aller à la page de la contribution
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Louis Olivier (IPN Orsay)10/05/2016 14:15One of the challenges nowadays in nuclear physics is to study nuclei as far as possible from stability. In these so-called exotic regions, the nuclear structure is strongly evolving. As a consequence, the “classical” magic numbers (8, 20, 28, 50, 82, 126) are not universal over the nuclear chart and unexpected behaviors may appear for extreme N/Z ratio. This presentation focuses on the...Aller à la page de la contribution
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M. Yonghao CHEN (IPNO)10/05/2016 14:30CERN's neutron time-of-flight facility (n_TOF) experimental area 2 (EAR-2), which has been constructed and is operational since 2014, is designed and built as a complementary to experimental area 1 (EAR-1). The parallel plate avalanche counter (PPAC) measurement was performed at EAR-2 on July of 2015. And some basic characteristics of this new beam line, such as beam profile, neutron flux, are...Aller à la page de la contribution
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Mlle Claire Portail (IPN Orsay)10/05/2016 14:45Deep inelastic collisions were discovered few decades ago and are nowadays frequently used in well-chosen conditions for nuclear structure studies. However, those reactions are producing nuclei in a wide angular range due to an orbiting phenomenon which can occur during the interaction. We aim then to describe the mechanism evolution from a particular angle called "grazing angle" to zero...Aller à la page de la contribution
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M. Wenjia HUANG (CSNSM (IN2P3-CNRS & UPS))10/05/2016 15:00Nuclear Masses are widely used in nuclear physics, astrophysics and in advanced applications such as nuclear energy and waste management. However only about 2800 of the nuclear masses have been experimentally determined for the moment, while 6000-7000 nuclei have been estimated to exist in the Chart of Nuclides. In nuclear astrophysics, the nuclear mass is an important input for...Aller à la page de la contribution
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M. Julien Guillot (IPNO)10/05/2016 15:15A R&D program is developed at the ALTO facility (Accélérateur Linéaire et Tandem d'Orsay) at the Institute of Nuclear Physics of Orsay (IPNO) in order to provide new beams of exotic neutron-rich nuclei, as intense as possible. The production of such beams will allow performing crucial experience for the increase of our knowledge in the field of the nuclear physics. At ALTO, the neutron-rich...Aller à la page de la contribution
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M. Hélion du Mas des Bourboux (CEA, Saclay)10/05/2016 16:00We measure the large-scale cross-correlation of quasars with the Lyman-alpha forest absorption field. We use over 170,000 forests from Data Release 12 (DR12) of the SDSS-III BOSS survey and over 240,000 quasars from DR12 and from DR7 of the SDSS-II survey. This study allows us to measure the Baryonic Acoustic Oscillation (BAO) scale, along and across the line of sight, at a mean redshift of z...Aller à la page de la contribution
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M. Zizhao ZONG (IPN-Orsay)10/05/2016 16:15The LHAASO (Large High Altitude Air Shower Observatory) project is a cosmic-ray observatory under constructing in China. WFCTA (Wide Field of View Cherenkov Telescope Array) is a important module in the LHAASO hybrid detection. This thesis work concertracte on the simulation and event reconstruction of WFCTA when it's working with other modules in LHAASO. This talk will show some preliminary...Aller à la page de la contribution
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M. Julien Baur (CEA-Irfu/SPP)10/05/2016 16:30Lyman-alpha absorption features probe the distribution of neutral Hydrogen (a legitimate tracer for dark matter) along the line-of-sight of luminous, high-redshift quasars. As such, they are a useful tool for probing the power spectrum at scales below a few Mpc and can thus be a powerful data set to test non-linear cosmological effects such as the mass of neutrinos. Using an unprecedently...Aller à la page de la contribution
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M. Matthias Lorentz (Irfu, CEA Saclay)10/05/2016 16:45Very high energy gamma rays (VHE, > 100 GeV) propagating over cosmological distances interact with the extragalactic background light (EBL) which is the second most intense background in the Universe after the cosmic microwave background. Observations of spectral features in the VHE band of extragalactic sources related to this energy-dependent absorption process with the H.E.S.S. array of...Aller à la page de la contribution
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M. Julio Arturo Rabanal Reina (EUSO-BALLOON)10/05/2016 17:00The EUSO-Balloon telescope is composed by a PDM, which is a phatfinder of one of the 130 PDM the front-end of the JEM-EUSO telescope. JEM-EUSO is the telescope that have like aim the detection of the UHECR watching the Earth's atmosphere from the space (inside the Japanese module of ISS)The first focus of this work was the integration of PDM and the corresponding validation test . Inside this,...Aller à la page de la contribution
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Mlle Floriana Zefi (LLR-Ecole Polytechnique)10/05/2016 17:15The supergiant elliptical galaxy M87 has been first detected at Very High Energies (VHE, E > 0.4 TeV) by the H.E.S.S. telescopes in 2005. M87 has been continuously observed by the VHE instruments, resulting in the detection of three high flux states occurring respectively in 2005, 2008 and 2010. However, the origin and location of the gamma-rays production remains still unresolved. With its...Aller à la page de la contribution
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Mme Pauline Zarrouk (CEA-Saclay)10/05/2016 17:30Oral PresentationDuring your PhD thesis, you can do teaching or scientific mediation but do you know that you can also work in a company as a consultant during 32 days maximum? This kind of doctoral missions in a company are called expertise-consulting missions. They have been created to develop links between the academic research world and the industrial world and to widen the PhD students' job prospects....Aller à la page de la contribution
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M. Jean-Baptiste Durrive (Institut d'Astrophysique Spatiale)10/05/2016 17:40Friendly seminars between PhD students of several laboratories of the Orsay campus.Aller à la page de la contribution
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Antoine Mollard (CEA)11/05/2016 09:00The CLIC project (Compact LInear Collider) requires the conditioning of 120000 cavities with high-power 12GHz-klystrons. My PhD project is the design of such a high-efficiency klystron. I work firstly at the enhancement of a Thales 4.9GHz-klystron to increase its efficiency. A klystron is a linear-beam vacuum tube that amplify or generate a RF signal. An electron stream is created with a...Aller à la page de la contribution
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Tingting Fu (IPN & ICSN)11/05/2016 09:15In the study of converting cellulosic plants into biofuels, much attention has been paid to maize stalk for its vast biomass production and great potential in bioethanol generation [1-3]. However, high lignification of cell walls in maize stem has significantly prevented the accessibility of enzymes, microorganisms or chemicals to cell wall polysaccharides, thus leading to a low efficiency in...Aller à la page de la contribution
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M. Pierre Favier (Laboratoire de l'Accelerateur Lineaire)11/05/2016 09:30Inverse Compton Scattering provides a unique way to produce quasi-monochromatic X-rays via the interaction of relativistic electrons with a laser pulse. This process has the advantage of producing a very high flux of X-rays with energies above a few tens of keV for a modest electron beam energy. In addition the output beam divergence is much larger than in classical synchrotron light sources...Aller à la page de la contribution
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Mlle Laura PACHECO RODRIGUEZ (CEA)11/05/2016 09:45The forthcoming high-luminosity environment of the Large Hadron Collider (LHC) implies the redesign of several subsystems in the ATLAS detector. In particular, an improvement of the calorimeter trigger system has to be done to match the data acquisition rate with the expected increase of the collisions rate. The strategy is to increase the calorimeter spatial resolution and to use the...Aller à la page de la contribution
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M. Luca Garolfi (LAL)11/05/2016 10:00The THOMX project aims to design and build a compact X-rays Compton backscattering light source demonstrator resulting from collisions between laser pulses and relativistic electron bunches. The project was recently funded and is under construction in the Orsay University campus. The machine consists of a 50–70 MeV LINAC injector and a storage ring. The PhD program covers the linear...Aller à la page de la contribution
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M. Federico Scozzi (IPN Orsay)11/05/2016 10:45The High-Acceptance Di-Electron Spectrometer (HADES) operates at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt with pion, proton and heavy-ion beams provided by the synchrotron SIS18. HADES results on e$^+$e$^-$ production in proton-nucleus reactions and in nucleus-nucleus collisions demonstrate a strong enhancement of the dilepton yield relative to a reference spectrum...Aller à la page de la contribution
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Mlle ying wang (Institut de Physique Nucléaire Orsay)11/05/2016 11:00Exclusive binary annihilation reactions induced by antiprotons of momentum from 1.5 to 15 GeV/c can be extensively investigated at FAIR/PANDA [1]. We are especially interested in the channel of charged pion pairs. Whereas this very probable channel constitutes the major background for other processes of interest in the PANDA experiment, it carries unique physical information on the quark...Aller à la page de la contribution
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Mlle Ani Simonyan (IPNO)11/05/2016 11:15The Heavy Photon Search (HPS) is an experiment held in Jefferson Laboratory to search for new heavy vector boson(s) (A') in the mass range of 20 MeV/c2 to 1000 MeV/c2. Such heavy photons could couple to electrons and be radiated in electron scattering before decaying into narrow e+ e- resonances which can be observed above the QED background. The experimental setup is using a new compact,...Aller à la page de la contribution
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M. Mohamad Tarhini (IPN Orsay)11/05/2016 11:30In ultra-relativistic heavy-ion collisions, the formation of a hot and dense strongly-interacting medium, a Quark-Gluon Plasma (QGP), is expected. To characterize the QGP, one must disentangle genuine QGP effects from the ones due to the nuclear medium presence known as Cold Nuclear Matter (CNM) effects. One of the important CNM effects is the modification of the parton distribution function...Aller à la page de la contribution
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M. Félix Hautot (CSNSM (CNRS))11/05/2016 14:30New developments in the field of robotics and computer vision enables to merge sensors to allow fast real-time localization of radiological measurements in the space/volume with near-real time radioactive sources identification and characterization, especially when premises statements are unknown. These capabilities lead nuclear investigations to a more efficient way for operators’ dosimetry...Aller à la page de la contribution
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95. 3D printing of anthropomorphic phantoms and validation of their usefulness in internal dosimetryMlle Tiffany BEAUMONT (IRSN)11/05/2016 14:30*In vivo* counting is a monitoring method used to estimate the incorporation of radionuclides from spectrometric measurements. In practice, the calibration is performed using physical phantoms which are currently limited as compared with the human anatomy. Many researches are focused on the development of realistic calibrations using numerical phantoms and Monte Carlo simulations. Nowadays,...Aller à la page de la contribution
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M. Bertrand Michaut (CEA)11/05/2016 14:30The French nuclear industry is looking into the extension of the operation time of pressurized water reactors (PWR) up to 60 years. The nuclear reaction occurs in a vessel which contains the core internals supporting the fuel assemblies. The lower parts of the internals are composed of Solution Annealed 304 austenitic stainless steel plates and Cold Worked 316 stainless steel bolts. Due to...Aller à la page de la contribution
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M. Andre Govinda Stahl (LLR)11/05/2016 14:30The measurement of Psi(2S) meson yield in PbPb collisions compared to the J/psi meson is used to study the modifications of the charmonium production in PbPb due to effects like melting in the quark gluon plasma and statistical recombination. Previous results reported by the CMS Collaboration using pp and PbPb data at sqrt(s_NN) = 2.76 TeV, have shown that the Psi(2S) meson is more suppressed...Aller à la page de la contribution
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Mlle Valentina NOVATI (CNRS-CSNSM)11/05/2016 14:30My thesis subject deals with neutrino physic. In particular it is connected to the CUORE experiment, whose purpose is to search for the neutrinoless double beta decay of 130Te, through the use of bolometers based on TeO2. My thesis deals with the data analysis of the current experiment, but also with the design and the test of an innovative type of bolometer that will enhance the sensitivity...Aller à la page de la contribution
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M. Frederic Georges (IPN)11/05/2016 14:30The internal structure of the nucleon - that is, what ordinary matter is made of and what the laws describing it are at their most fundamental level - is still not fully understood by modern nuclear physics. Form factors provide insight about parton positions while parton distribution functions give information about their momentum distribution inside the nucleon, but no correlations can be...Aller à la page de la contribution
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Giulia Negro (CEA-Saclay Irfu/SPP)11/05/2016 14:30Detailed studies on data at 0T in order to understand the CMS Electromagnetic Calorimenter performances during data taking at 0T of the Run2 of LHC will be presented, together with their comparison with data at 3.8T of Run2. Also data-MC comparisons in order to understand the remaining data-MC discrepancies at 3.8T will be shown.Aller à la page de la contribution
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Nancy HUPIN (CEA Saclay)11/05/2016 14:30The structural evolution on the far neutron-rich side of stability is critical for defining the features of the elemental abundance distribution created during the rapid-neutron capture process (r-process). A potentially large shell-gap was historically predicted at N=70 in $^{110}$Zr, which could significantly modify the r-process abundances before the A=130 peak. Recent lifetime measurements...Aller à la page de la contribution
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M. Mehdi DRISSI (CEA/SPhN)11/05/2016 14:30Even though the physics of atomic nuclei is a low-energy realization of QCD, a direct link between the two is concealed by the strongly coupling nature of QCD at low energies. Nevertheless, exploiting the separation of relevant low- and high-energy scales, chiral EFT, built only on nucleons and pions degrees of freedom, generates an implicit connection, providing a systematic framework that...Aller à la page de la contribution
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Mme Marie-Coralie Delattre (IPNO)11/05/2016 14:30The objective of my thesis is to study the one particle orbitals when getting closer to the 78Ni. Are the N=50 and Z=28 gaps stay big enough to ensure the magicity of 78Ni? Concretely, it’s about studying nuclei in the isotonic chains N=49 and N=51, 79,81Zn fed by beta and beta-n decay of 79,81Cu and 80Cu. The low energy states in daughter nuclei will help to reconstruct the 1 particle / 1...Aller à la page de la contribution
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M. Luis Ammour (Université Paris-Sud - IMNC)11/05/2016 14:30The purpose of MAPSSIC project is to provide an innovative tool for imaging beta+ radiopharmaceuticals in rodents brain, in order to assess brain functional processes. Complementary to others imaging modalities (such as Positron Emission Tomography), MAPSSIC distinguishes itself by performing real time images on awake and fully freely-moving animals, a requirement for concomitant behavioral...Aller à la page de la contribution
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M. Petar Marevic (CEA, IPN)11/05/2016 14:30The relativistic mean-field models, based on the energy density functionals theory and extended to include pairing correlations, provide a very good microscopic description of ground-state properties of atomic nuclei. However, in order to calculate excitation spectra and electromagnetic transition rates, it is necessary to take into account collective correlations that arise from symmetry...Aller à la page de la contribution
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M. Pierre Arthuis (CEA/DRF/IRFU/SPhN)11/05/2016 14:30The recent development of nuclear many-body ab initio methods has extended their application range to middle-mass doubly-closed shell nuclei and light doubly-open shell ones in the past few years, but heavy nuclei are at the moment out of reach. On the contrary, energy density functionals (EDF) have been around for decades, covering the whole nuclear chart. However, being based on...Aller à la page de la contribution
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M. Laurent Graziano (CEA)11/05/2016 14:30In the recent years a solver based on the Method of Characteristics (MOC) allowing the treatment of $3$D extruded geometries has been developed inside the TDT module of APOLLO$3$. The standard Step Constant (SC) approximation is used and results show an excellent agreement with Monte-Carlo simulations. However a fine mesh refinement is needed to converge, due to strong flux gradients. An...Aller à la page de la contribution
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M. Florian Haurais (EDF RetD)11/05/2016 14:30This poster presents the main results of a study conducted to quantify the degradation state of Zr-based fuel claddings submitted to severe accident conditions in a nuclear reactor core: high temperatures and pure steam or air-steam mix. Due to the progressive thickening of a dense and protective ZrO2 layer, the oxidation kinetics of Zr-based claddings in steam, at high temperatures typical of...Aller à la page de la contribution
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Mlle Lisa Belkacemi (CEA Saclay)11/05/2016 14:30Reactor pressure vessel (RPV) steels embrittlement under neutron irradiation is the main lifetime limiting factor of nuclear reactors. The RPV embrittlement is primary due to the impeding of dislocation glide caused by their interaction with nanometric clusters composed of point defects and/or solute atoms which form under irradiation. Point defect clustering can lead to the formation of...Aller à la page de la contribution
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M. Charles Delporte (LAL)11/05/2016 14:30In July 2012, the ATLAS and CMS experiments at the LHC reported the observation of a new particle with a mass about 125 GeV and properties consistent with that expected for the Higgs boson in the Standard Model. Especially, the SM Higgs boson decay channel H->bb is predicted to have a branching ratio about 57% for mH = 125 GeV. Hence, its observation is crucial in order to access to the Higgs...Aller à la page de la contribution
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Mlle Anastasiia Zolotarova (CEA/IRFU/SPP)11/05/2016 14:30Neutrinoless double beta decay is a very rare nuclear process whose observation would provide essential information on neutrino properties. My PhD thesis subject focuses on the search for this phenomenon in the isotope 100Mo. The thesis activity aims at preparing and performing an underground demonstrator experiment named LUCINEU.
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M. Amar Boukhari (CNRS)11/05/2016 14:30PHENIICS School Research thematic: nuclear physics. Laboratory: Centre de Sciences Nucléaire et de Sciences de la Matière (CSNSM) Thesis director: Georgi Georgiev Amar Boukhari 1st year of PhD amar.boukhari@csnsm.in2p3.fr Title: Structure of exotic nuclei. Spin-oriented radioactive...Aller à la page de la contribution
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Quentin Luce (Institut de Physique Nucléaire d'Orsay)11/05/2016 14:30The Pierre Auger Observatory is today the largest observatory built, with a ground surface of 3000 km², dedicated to the observation of ultra-high energy cosmic rays (>10^18 eV). At these energies we found two structures in the energy spectrum of the cosmic rays (CRs): the ankle (~ 4.10^18 eV) and the GZK cut-off (~5.10^19 eV) which are really interesting to understand the origin of the CRs...Aller à la page de la contribution
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Mlle Shifali SINGH (CEA, Cadarache)11/05/2016 14:30In case of a severe accident scenario in sodium-cooled fast reactors, due to transient over power accident (TOPA) or unprotected loss of flow accident (ULOFA) the fuel might melt generating a hot mixture named corium. When the hot molten fuel (≈ 3000 K) issuing from the degraded core comes in contact with sodium, molten fuel-coolant interaction (FCI) will occur, which can be explosive. The...Aller à la page de la contribution
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Mlle najah mejai (CSNSM)11/05/2016 14:30Mon travail de thèse concerne l’étude de l’évolution structurale sous faisceaux d’ions d’oxydes de terres rares binaires de structure cubique. L’objectif est double. Premièrement, mettre en évidence les changements structuraux intervenant dans ces conditions hors équilibre et en comprendre l’origine, en vue de l’utilisation de ces matériaux dans le domaine de l’énergie nucléaire. Deuxièmement,...Aller à la page de la contribution
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Mme Elodie Verzeroli (Doctorant)11/05/2016 16:00The increasing global demand for energy and the consideration of environmental constraints have rekindled the interest for various forms of renewable energy production modes, including wind energy. In addition to the traditional wind turbines, the new idea is to convert wind energy directly into electrical energy without any moving parts. The principle of direct conversion is actually quite...Aller à la page de la contribution
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M. Henri Louvin (CEA)11/05/2016 16:15In the Monte Carlo simulation of for particle transport, and especially for shielding applications, variance reduction techniques are widely used to help simulate realisations of rare events, and reduce the relative errors on the estimated scores for a given computation time. Adaptive Multilevel Splitting (or AMS) is one of these variance reduction techniques that has recently appeared in the...Aller à la page de la contribution
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M. Sviatoslav Bilokin (Laboratoire de l'Accélérateur Linéaire)11/05/2016 16:30Particle PhysicsA simple track-finding algorithm was developed to study tracks left by secondary particles, emerging from hadronic interactions in a highly granular electromagnetic calorimeter prototype. The predictions of two Monte Carlo Geant4 models are compared with experimental data, taken at FNAL in 2008, using a novel track-finding algorithm. Present Monte Carlo simulations provide a good`enter code...Aller à la page de la contribution
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M. Francesco Gizzarelli (CEA Saclay)11/05/2016 16:45Particle PhysicsT2K experiment is a long-baseline neutrino oscillation experiment in Japan, muon (anti-)neutrino beam is produced at J-PARC in Tokai and detected then 295 km away at the Super-Kamiokande (SK), a water cherenkov far detector in Kamioka. T2K main puropose is to observe electronic (anti-)neutrino appareance and muonic (anti-)neutrino disappereace, oscillation parameters are determined then by...Aller à la page de la contribution
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Mlle Inna Kucher (CEA Saclay)11/05/2016 17:00Particle PhysicsA search for the Higgs boson produced in association with a pair of top quarks and its decay to two photons has been performed by the CMS Collaboration at the LHC experiment using pp collisions at a center-of-mass energy of 13TeV with an integrated luminosity of 2.6/fb. This associated production is the only direct access to the top quark Yukawa coupling and decay to two photons has very clean...Aller à la page de la contribution
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