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101. Neutrons production on the IPHI accelerator for the validation of the design of the compact neutron source SONATE

Author

Menelle, Alain, Ott, Frederic, Prunes, Fabien, Homatter, Benoit, Annighöfer, Burkhard, Porcher, Florence, Alba-Simionesco, C., Chauvin, Nicolas, Schwindling, Jérôme, LETOURNEAU, Alain, Marchix, Anthony, Tran, Ngoc-Hoang, Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-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, LLB - Matière molle et biophysique (MMB), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, F. Ott, A. Menelle, C. Alba-Simionesco, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), LLB - Nouvelles frontières dans les matériaux quantiques (NFMQ), LLB - Infrastructures et développement (INFRA), Département des Accélérateurs, de Cryogénie et de Magnétisme (ex SACM) (DACM), 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, Département de Physique Nucléaire (ex SPhN) (DPHN), and HEP, INSPIRE

Subjects
Physics - Instrumentation and Detectors, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Nuclear Theory, FOS: Physical sciences, Flux, Neutron scattering, 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, [SPI]Engineering Sciences [physics], law, 0103 physical sciences, [CHIM]Chemical Sciences, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear Experiment, Physics, [PHYS]Physics [physics], Spectrometer, 010308 nuclear & particles physics, Detector, Particle accelerator, Instrumentation and Detectors (physics.ins-det), 3. Good health, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Neutron source, Physics::Accelerator Physics
Abstract

We aim at building an accelerator based compact neutron source which would provide a thermal neutron flux on the order of 4E12 n.s-1.cm-2.sr-1. Such brilliance would put compact neutron sources on par with existing medium flux neutron research reactors. We performed the first neutron production tests on the IPHI proton accelerator at Saclay. The neutron fluxes were measured using gold foil activation and 3He detectors. The measured fluxes were compared with MCNP and GEANT4 Monte Carlo simulations in which the whole experimental setup was modelled. There is a good agreement between the experimental measurements and the Monte-Carlo simulations. The available modelling tools will allow us to optimize the whole Target Moderator Reflector assembly together with the neutron scattering spectrometer geometries., 10 pages, 4 figures, 2 tables

Published
2019
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102. Lattice design for 5MeV-125mA CW RFQ operation in the LIPAc

Author

Shimosaki, Yoshito, Kasugai, Atsushi, Kondo, Keitaro, Sakamoto, Keishi, Sugimoto, Masayoshi, Cara, Philippe, Duglue, Daniel, Dzitko, Herve, Heidinger, Roland, Chauvin, Nicolas, Bellan, Luca, Comunian, Michele, Fagotti, Enrico, Pisent, Andrea, Branas, Beatriz, Oliver, Concepcion, Podadera, Ivan, and Kobayashi, Hitoshi

Abstract

The installation and commissioning of the Linear IFMIF Prototype Accelerator (LIPAc), which is under installation and commissioning under the Broader Approach agreement, are ongoing. The deuteron beam will be accelerated by the RFQ linac from 100 keV to 5 MeV during the commissioning phase-B and by the SRF linac up to 9 MeV during the phase-C. The commissioning phase-B+ will be implemented between phase-B and C to complete the engineering validation of the RFQ linac before installing the SRF linac. The lattice for the deuteron beam of 5 MeV and 125 mA at the commissioning phase-B+ was designed., 10th International Particle Accelerator Conference, IPAC2019

Published
2019

103. Beam Dynamics Errors Studies for the IFMIF-DONES SRF-LINAC

Author

Chauvin, Nicolas, Bazin, Nicolas, Chel, Stéphane, Du, Lei, Plouin, Juliette, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
solenoid, cryomodule, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Accelerator Physics, SRF, cavity, linac
Abstract

International audience; The goal of the IFMIF-DONES (International Fusion Materials Irradiation Facility-DEMO Oriented Neutron Source) project is to build an irradiation facility that will provide a sufficient neutron flux to study and characterize structure materials foreseen for future fusion power plant. In order to accelerate the required 125mA/40 MeV continuous deuteron beam from 5 MeV to 40 MeV, a superconducting radio-frequency (SRF) linac, housed in five cryomodules, is proposed. The design is based on two beta families (β=0.11 and β=0.17) of half-wave resonators (HWR) at 175MHz. The transverse focusing is achieved using one solenoid coil per focusing period. This paper presents the extensive multiparticle beam dynamics simulations that have been performed to adapt the beam along the SRF-linac in such a high space charge regime. As one of the constraints of the IFMIF linac is a low level of beam losses, specific optimizations have been done to minimize the beam occupancy in the line (halo). A Monte Carlo error analysis has also been carried out to study the effects of misalignments or field imperfections (static errors) and also vibrations or power supplies ripple (dynamic errors). The results of these errors studies are presented and discussed.

Published
2019
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105. How the country-of-origin impacts wine traders’ mental representation about wines: A study in a world wine trade fair

Author

University of St. Gallen, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Fundación Alfonso Martín Escudero, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Behrens, Jorge [0000-0002-3952-1722], Rodrigues, Heber, Rolaz, Julien, Franco-Luesma, Ernesto, Sáenz-Navajas, María-Pilar, Behrens, Jorge, Valentin, Dominique, Depetris-Chauvin, Nicolas, University of St. Gallen, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Fundación Alfonso Martín Escudero, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Behrens, Jorge [0000-0002-3952-1722], Rodrigues, Heber, Rolaz, Julien, Franco-Luesma, Ernesto, Sáenz-Navajas, María-Pilar, Behrens, Jorge, Valentin, Dominique, and Depetris-Chauvin, Nicolas

Abstract

Using data collected at a world wine trade fair, we study how the country-of-origin impacts wine traders’ mental representation about wines. In the analysis we use traditional exporters in Old (France) and New (Argentina) world wine countries in comparison to non-traditional exporters in Old (Switzerland) and New (Brazil) world wine countries. Three main findings are reported. First, the country-of-origin of wines was more important on guiding participants’ representations, than the category of countries the traders came from. Second, participants’ evocations were more precise and specific for traditional wine-exporting countries than for less traditional wine exporting countries. Finally, the lack of traders’ knowledge of wines from non-traditional wine-exporting countries produced associations and beliefs related to the image of the country itself. Our findings have important implications for the marketing and export activities of the wine industry.

Published
2020

108. Neutrons production on the IPHI accelerator for the validation of the design of the compact neutron source SONATE.

Author

Ott, F., Menelle, A., Alba-Simionesco, C., Tran, Hoang Ngoc, Ott, Frédéric, Darpentigny, Jacques, Marchix, Anthony, Letourneau, Alain, Chauvin, Nicolas, Prunes, Fabien, Homatter, Benoît, Annighöfer, Burkhard, Menelle, Alain, and Schwindling, Jérôme

Subjects
NEUTRON sources, NEUTRON flux, NEUTRON scattering, RESEARCH reactors, PROTON accelerators
Abstract

We aim at building a compact accelerator-based neutron source (CANS) which would provide a thermal neutron flux on the order of 4x1012 n.s-1.cm-2.sr-1. Such a brilliance would put compact neutron sources on par with existing medium flux neutron research reactors for neutron scattering experiments. We performed the first neutron production tests on the IPHI proton accelerator at Saclay at a proton energy of 3 MeV. The thermal neutron flux were measured using gold foil activation and 3He detectors. The measured flux were compared with GEANT4 Monte Carlo simulations (10.4) in which the whole experimental setup was modelled. There is a good agreement between the experimental measurements and the Monte-Carlo simulations. The available modelling tools will allow us to optimize the whole Target Moderator Reflector assembly together with the neutron scattering spectrometer geometries for the design of the neutron scattering facility SONATE. [ABSTRACT FROM AUTHOR]

Published
2020
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109. Hybrid core - shell nanowires grown by molecular beam epitaxy

Author

Penuelas, Jose, Dursap, Thomas, FOUQUAT, Louise, VETTORI, Marco, GUAN, Xin, Botella, Claude, Regreny, Philippe, Chauvin, Nicolas, Bachelet, Romain, Saint-Girons, Guillaume, Danescu, Alexandre, GRENET, Geneviève, Bugnet, Matthieu, Patriarche, Gilles, GENDRY, Michel, INL - Hétéroepitaxie et Nanostructures (INL - H&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), INL - Spectroscopies et Nanomatériaux (INL - S&N), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), 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)-Centre National de la Recherche Scientifique (CNRS), Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

110. Acceptance of digital payment methods in Switzerland

Author

Milla Rodriguez, Allison and Depetris Chauvin, Nicolas

Abstract

The advent of the technology brings new possibilities in term of payment solutions and as a consequence the use of cash is declining. There are even regulations that force people to pay by electronic methods depending on the amount/or the country. These regulations limit the amount of cash in a single transaction to combat illegal practices. Indeed, cashless payment methods offer transparency and traceability which allows verification in case of fraudulent transactions. However, according to some articles, Swiss are very attached to cash and are far away from a cashless society. Switzerland being part of the Financial Action Task Force (FATF) is the only nation where you can pay in cash up to 100,000 Swiss francs and it has the highest banknote denomination, 1,000 Swiss francs, compared to any other European nations. Therefore, this work addresses the adoption of digital payment methods in Switzerland. The aim of this thesis is, using an online survey, to find out what factors affect the decision of Swiss residents to use digital payment systems. For further relevance, the linear regression model helped to analyze the survey data. This method allows to determine how the use of a payment method is affected by a number of factors. It has been noticed that there are specific reasons and demographic variables that affect the use of different payment methods. Convenience and security are the main advantages, whereas costs and poor internet connection are the main drawbacks regarding cashless payment methods. Regulations and restrictions lead to the opposite of the desired effect because they are perceived as limiting freedom. As a consequence, introducing restriction to encourage people to use cashless payment systems in not the best way to go about it. Therefore, the best approach to encourage people to adopt cashless payment methods is by improving the infrastructures and lowering the costs for its use for customers as well as for small business. It might not exclude the use of cash definitely, but it can decrease it considerably. Finally, this work is meant to be useful for businesses which want to be actors in the payments industry. The diversity of digital payment methods might increase even more with the advance of the technology.

Published
2018

111. What are the factors limiting La Côte wine producers to export?

Author

Rolaz, Julien and Depetris Chauvin, Nicolas

Abstract

Today over 200 types of vine are grown within the Swiss territory. Despite a large variety of grapes, the production is limited as the vineyards are small and located in hillside, which complicates the harvest. Switzerland counts four main wine producing regions. Vaud region is the second largest, which is divided into four smaller ones. The largest of them, La Côte region is located on the western side of the Lake of Geneva, which enjoys from a micro-climate to guarantee a constant quality. In contrast to watches, cheese and chocolate, Swiss wine does not enjoy from large exports to increase its notoriety. Swiss wine exports represent around 1% of the total production volume. Local specialists argue that the restrained production volume and the high production costs have a certain effect on the exporting activities. In addition to that, Swiss wine fears a strong domestic competition as domestic consumption is largely dominated by foreign wine. Despite, being the favourite alcoholic beverage, its consumption is decreasing. The domestic competition and the decrease in consumption could incentivize La Côte wine producers to export. Unfortunately, for Swiss wine producers neighbouring markets are saturated and the demand for foreign wine is low to, almost inexistent. Consequently, Swiss winemakers need to find markets where the demand for fine wine is increasing. The sales strategies in the domestic and target foreign market are rarely similar. Consequently, the first companies to penetrate a new market, generally face important costs linked to this activity. On the other hand, they create opportunities for companies wishing to penetrate this market. Therefore, pioneer exporting activities are rarely profitable. Consequently, collective actions such as exporting consortium permit costs and risk reduction for wineries seeking to export. In this context, twenty-three wineries in La Côte were interviewed. This research paper aims at understanding the factors limiting exporting activities of La Côte wineries. To complete the study an interview with the Director of the Office des Vins Vaudois was pursued. The results revealed that exporting wineries invest more in their promotion and distribution strategies in the domestic market than non-exporting wineries. In addition to that, product and price adaptation play an important role to succeed in exporting activities. The use of comparative and linear regression analyses allowed the identification of internal wineries characteristics being determinant for exports. E.g. The winery size and the type of company have a strong linkage with export performance. On the other hand, the study has rejected the hypothesis that exporting wineries have a lower perception of exporting barriers than the non-exporting ones. The paper was completed with a section measuring the benefits generated by an export consortium. These findings lead to ask whether an export consortium for La Côte wine producers could enhance their exporting performance and for which market it should be created?

Published
2018

112. How does the knowledge of Swiss consumers on palm oil affects consumption patterns?

Author

Abbondioli, Estelle and Depetris Chauvin, Nicolas

Abstract

Palm oil is the most produced vegetable oil and accounts for 30% of the global vegetable oil production. This significant production generates negative externalities such as contributing to climate change, deforestation of the rainforests and biodiversity loss. However, this vegetable oil holds many advantages as well, such as having the highest agricultural yield, creating jobs and wealth for millions of people, and having unique exploitable characteristics. The non-governmental organizations WWF and Greenpeace support the use of certified sustainable palm oil (CSPO) to reduce the negative externalities linked to the production of palm oil to the minimum. Consumers in developed countries such as Switzerland only experience these negative externalities indirectly. Hence, it is important to know whether consumers are aware of these global issues. Their knowledge and perception on palm oil may influence their purchasing decisions. The objective of this research is to make recommendations on how to influence the knowledge on palm oil of Swiss consumers such that they make the right decision, according to the NGOs, of choosing certified sustainable palm oil. The research methods include data collection through an online survey, answers’ analysis with regressions analyses, contingency tables and comparisons between respondents with different levels of knowledge and with different demographic and perception characteristics. The results of the data analysed show that the consumers’ level of knowledge on palm oil has a low impact on consumers’ consumption patterns. Only one variable is decisive, the health benefits of palm oil. The more the consumers deem palm oil as being healthy the more they favour certified sustainable palm oil in their choices. The results also show that the more the respondents give importance to the issues related to the production of palm oil, such as climate change, deforestation, and so on, the less they favour certified sustainable palm oil in their choices. The recommendations are to first promote the health benefits of consuming palm oil in small quantity so that consumers would feel comfortable consuming it. Second, to develop and promote the existing sustainable certification schemes for the production of palm oil. The goal is to increase the trust of customers towards this option so that they would understand that it is a viable option to tackle the issues related to the production of palm oil. These two actions should help consumers to understand the benefits of certified sustainable palm oil and empower them to make better consumption decisions.

Published
2018

113. Deuteron Beam Commissioning of the Linear IFMIF Prototype Accelerator Source and LEBT

Author

Chauvin, Nicolas, Marqueta, Alvaro, Pisent, Andrea, Bolzon, Benoit, Fagotti, Enrico, Scantamburlo, Francesco, Harrault, Francis, Gérardin, Frédéric, Pruneri, Giuseppe, Dzitko, Hervé, Bellan, Luca, Comunian, Michele, Beauvais, Pierre-Yves, Gobin, Raphaël, Roland, Heidinger, Chel, Stéphane, Franck, Sénée, Alvaro Marqueta, Benoit Bolzon, Francesco Scantamburlo, and Giuseppe Pruneri

Subjects
Physics::Accelerator Physics
Abstract

The Linear IFMIF Prototype Accelerator aims to operate in Rokkasho Fusion Institute a 125 mA/cw deuteron beam at 9 MeV In order to prove the technical feasibility of the IFMIF accelerators concept. A 2.45 GHz ECR ion source developed by CEA-Saclay is designed to deliver 140 mA/100 keV CW D + beam. The low energy beam transfer line (LEBT) relies on a dual solenoid focusing system to transport and match the beam into the next accelerating section which is a Radio-Frequency Quadrupole (RFQ). At the end of the LEBT, the normalized RMS emittance has to be lower than 0.3π mm.mrad in order to reach the optimal beam transmission through the RFQ. This contribution will present the different commissioning phases of LIPAC ion source and LEBT. The experimental results that have been obtained will be reported. In particular, beam emittance measurements as a function of ion source extraction voltage gaps, total extracted current from the source and solenoid tunings will be showed. In order to model as well as possible the beam transport thought LEBT, intensive beam dynamics simulations that take into account space charge compensation have been performed using a self-consistent particle-in-cell code. Simulation results will be discussed and compared to experimental data.

Published
2018

114. Progress Report on LIPAC

Author

Akagi, Tomoya, Ebisawa, Takashi, Hirata, Yosuke, Ichimiya, Ryo, Kasugai, Atsushi, Kondo, Keitaro, Maebara, Sunao, Sakamoto, Keishi, Shinya, Takahiro, Abbon, Philippe, Bazin, Nicolas, Bolzon, Benoit, Chauvin, Nicolas, Chel, Stephane, Gobin, Raphael, Jacques Marroncle, Renard, Bertrand, Antoniazzi, Loris, Bellan, Luca, Bortolato, Damiano, Comunian, Michele, Fagotti, Enrico, Grespan, Francesco, Montis, Maulizio, Palmieri, Antonio, Pisent, Andrea, Scantamburlo, Francesco, Pierre-Yves Beauvais, Dzitko, Herve, Gex, Dominique, Heidinger, Roland, Jokinen, Antti, Moya, Ivan, Phillips, Guy, Cara, Philippe, David, Jiménez-Rey, Kirpitchev, Igor, Joaquin, Mollá, Purificacion Méndez, Podadera, Ivan, Regidor, David, Varela, Rodrigo, Weber, Moises, Knaster, Juan, Pruneri, Giuseppe, and Sugimoto, Masayoshi

Abstract

International Fusion Materials Irradiation Facility (IFMIF) is the neutron source for simulating fusion reactor environment using two 40 MeV/125 mA CW D+ beams. LIPAc facility is under construction in Rokkasho for validating 9 MeV/125 mA CW linac technology as a prototype of the IFMIF accelerator. Commissioning of 5 MeV CW RFQ is underway after the completion of installation of RFQ, MEBT, diagnostic plate. low power beam dump, RF power system and their auxiliaries. As the first step, high power RF conditioning is planned to complete in early 2018 and beam commissioning will start with stepwise approach at the same time. The status of LIPAc construction for preparing 9 MeV acceleration and results of RFQ beam commissioning are presented., 29th Linear Accelerator Conference-LINAC18

Published
2018

115. Commissioning of the Proton-Linac ECR Source for FAIR

Author

Fils, JéRôMe, Berezov, Rustam, Bolzon, Benoit, Chauvin, Nicolas, Delferrière, Olivier, Gauthier, Yannick, Hollinger, Ralph, Sauce, Yannick, Tuske, Olivier, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
solenoid, rfq, emittance, Physics::Instrumentation and Detectors, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Accelerator Physics, linac, Beam extraction and optics, Accelerator Physics, proton
Abstract

The construction of the source and Low Energy Beam Transport of the future Proton-Linac for the FAIR facility in Darmstadt, Germany (Facility for Antiproton and Ion Research) is going forward at CEA-Saclay in France. The latest results of normalized emittance and of species proportions are shown at different position, directly at the source exit, between the 2 solenoids of the LEBT, and also around the theoretical focal point at RFQ entrance position. A new software for emittance treatment allows separating the different species after emittance measurement and is used to process the data. This paper presents the status of the FAIR injector commissioning at Saclay in summer 2018., Proceedings of the 23th Int. Workshop on ECR Ion Sources, ECRIS2018, Catania, Italy

Published
2018
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116. Coupling of quantum emitters in 4H SiC nanopillars

Author

Al Atem, A, Almutairi, A, Casteletto, S, Chauvin, Nicolas, Guillot, G., Bluet, J., INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), School of Science, RMIT University, Melbourne, Australia, and GUILLOT, Gérard

Subjects
[SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics]
Abstract

International audience; Points defects in silicon carbide (SiC) arised in past few years as candidates for quantum applications [1] : solid state quantum bits (qubits) , single photon source (SPS), nanoscale magnetic or electric fields or, pressure or temperature sensors for instance. Today, SPS in SiC optically or electrically driven have been realized [2, 3 ]and coherent control of electron spin has been demonstrated [4] even at room temperature [5] using solid immersion lens for efficient signal collection. Both for Qubit or SPS application, collection efficiency of the emitted light is a crucial issue for room temperature application. Toward this end a scalable wafer photonic design is needed. Two demonstration have been published in this field : use of photonic crystal cavity in cubic SiC for enhancing the di-vacancy VSiVC emission [6], design of nanopillars in 4H SiC by reactive ion etching (RIE) for VSi emission collection efficiency improvement [7]. In this work we focus on nanopillars realization by densified plasma RIE (Inductively Coupled Plasma : ICP-RIE) on n-type 4H-SiC. Using UV laser lithography and a metallic hard mask (Ni) we have realized nanopillars arrays with height 4.3 µm, diameter 700 nm and pitch 4 µm. The samples have been irradiated at room temperature with H + at different fluences (10 16 cm-2 and 10 13 cm-2) to create point defects. Annealing at different temperature to favorite promote presence of different defects have been realized (VSi without annealing, 750°C for VSiVC, 900°C for NVSi). Low temperature (15K) macroscopic (spot diameter 250 µm) photoluminescence (671 nm excitation) shows important enhancement of the VSi and VsiVC PL lines in the region where the pillars are present. Micro PL experiments with non optimal 532 nm excitation has confirmed this results with 10 times higher signal from the pillars. Detailed PL experiments using different excitation source will be presented and analyzed using FDTD calculation of the PL propagation in the pillars to further demonstrate their efficiency for PL collection.

Published
2018

117. Commissioning Status of Linear IFMIF Prototype Accelerator (LIPAc)

Author

Kasugai, Atsushi, Abbon, Philippe, Akagi, Tomoya, Antoniazzi, Loris, Bazin, Nicolas, Beauvais, Pierre-Yves, Bellan, Luca, Bolzon, Benoit, Bortolato, Damiano, Cara, Philippe, Chauvin, Nicolas, Chel, Stéphane, Comunian, Michele, Dzitko, Hervé, Ebisawa, Takashi, Fagotti, Enrico, Gex, Dominique, Gobin, Raphael, Grespan, Francesco, Heidinger, Roland, Hirata, Yosuke, Ichimiya, Ryo, Jiménez-Rey, David, Jokinen, Antti, Kirpitchev, Igor, Knaster, Juan, Kondo, Keitaro, Maebara, Sunao, Marqueta, Alvaro, Marroncle, Jacques, Mollá, Joaquin, Montis, Maurizio, Moya, Ivan, Méndez, Purificación, Palmieri, Antonio, Phillips, Guy, Pisent, Andrea, Podadera, Ivan, Pruneri, Giuseppe, Regidor, David, Renard, Bertrand, Sakamoto, Keishi, Scantamburlo, Francesco, Shinya, Takahiro, Sugimoto, Masayoshi, Weber, Moisés, de la Morena, Cristina, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
rfq, emittance, MMI, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], cavity, acceleration
Abstract

International audience; The IFMIF project aiming at material tests for a future fusion DEMO reactor is under the EVEDA phase in the BA Agreement of fusion program between Japan and EU. As the accelerator activity, the installation and commissioning of the Linear IFMIF Prototype Accelerator (LIPAc) is at the second stage of demonstration of the feasibility of the low energy section of an IFMIF deuteron accelerator up to 9 MeV with a beam current of 125 mA, CW. The installation of injector, RFQ, MEBT, D-Plate and LPBD for LIPAc with 8 coaxial high-power transmission lines and RF power system was just done in 2017 at Rokkasho, Japan. After that, the RF conditioning of RFQ for beam commissioning is underway. The beam commissioning of RFQ with H⁺/D⁺ and the acceleration demonstration up to 5 MeV-125 mA-0.1% duty cycle with D⁺ will be done.

Published
2018
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118. ESS nBLM: Beam Loss Monitors based on Fast Neutron Detection

Author

Papaevangelou, Thomas, Alves, Helder, Aune, Stephan, Beltramelli, Joel, Bertrand, Quentin, Bey, Thomas, Bolzon, Benoit, Chauvin, Nicolas, Combet, Michel, Desforge, Daniel, Desmons, Michel, Dolenc Kittelmann, Irena, Gauthier, Yannick, Giner-Demange, Emeline, Gomes, Adelino, Gougnaud, Francoise, Gressier, Vincent, Hall-Wilton, Richard, Harrault, Francis, Höglund, Carina, Iguaz Gutierrez, Francisco Jose, Joannem, Tom, Kebbiri, Mariam, Lahonde-Hamdoun, Caroline, Le Bourlout, Pascal, Legou, Philippe, Maillard, Olivier, Marcel, Alain, Marchand, Claude, Mariette, Yannick, Marroncle, Jacques, Nadot, Victor, Nikolopoulos, Konstantinos, Oublaid, Maryam, Perreu, Gabrielle, Piquet, Olivier, Pomorski, Michal, Pottin, Bruno, Robinson, Linda, Sauce, Yannick, Schwindling, Jerome, Segui, Laura, Senée, Franck, Shea, Thomas, Svensson, Per-Olof, Touzery, Robert, Tsiledakis, Georgios, Tuske, Olivier, Uriot, Didier, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), European Spallation Source ERIC, Lund University [Lund], School of Physics and Astronomy [Birmingham], University of Birmingham [Birmingham], Laboratoire Capteurs Diamant (LCD-LIST), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Dong-O Jeon (IBS), Dong-Eon Kim (PAL), Volker RW Schaa (GSI), European Project: 676548,H2020,H2020-INFRADEV-1-2015-1,BrightnESS(2015), and European Project: 654168,H2020,H2020-INFRAIA-2014-2015,AIDA-2020(2015)

Subjects
Physics::Instrumentation and Detectors, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Micromegas detector, 7. Clean energy, 01 natural sciences, Accelerator Physics, neutron, ionization chamber, 0103 physical sciences, X-rays, photons, fast neutrons, linac, 010302 applied physics, instrumentation, Neutron-gamma discrimination, detector, 010308 nuclear & particles physics, photon, neutrons, gamma-rays, radioactivity, Beam Instruments and Interactions, European Spallation Source, Physics::Accelerator Physics, ionizing radiation, proton
Abstract

A new type of Beam Loss Monitor (BLM) system is being developed for use in the European Spallation Source (ESS) linac, primarily aiming to cover the low energy part (proton energies between 3-100 MeV). In this region of the linac, typical BLM detectors based on charged particle detection (i.e. Ionization Cham-bers) are not appropriate because the expected particle fields will be dominated by neutrons and photons. Another issue is the photon background due to the RF cavities, which is mainly due to field emission from the electrons from the cavity walls, resulting in brems-strahlung photons. The idea for the ESS neutron sensi-tive BLM system (ESS nBLM) is to use Micromegas detectors specially designed to be sensitive to fast neutrons and insensitive to low energy photons (X and gammas). In addition, the detectors must be insensitive to thermal neutrons, because those neutrons may not be directly correlated to beam losses. The appropriate configuration of the Micromegas operating conditions will allow excellent timing, intrinsic photon back-ground suppression and individual neutron counting, extending thus the dynamic range to very low particle fluxes., Proceedings of the 61\textsuperscript{st} ICFA ABDW on High-Intensity and High-Brightness Hadron Beams, HB2018, Daejeon, Korea

Published
2018
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119. Efficient single InAs/InP quantum dot-nanowire source monolithically grown on silicon

Author

Jaffal, Ali, Regreny, Philippe, Patriache, Gilles, GENDRY, Michel, Chauvin, Nicolas, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Hétéroepitaxie et Nanostructures (INL - H&N), Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

120. GaAs/AlGaAs core/shell nanowires on Si substrates for photovoltaics: toward an optimized tandem solar cell

Author

Vettori, Marco, Cattoni, Andrea, Regreny, Philippe, Penuelas, Jose, Chauvin, Nicolas, Chevallier, Céline, Scaccabarozzi, Andrea, Patriarche, Gilles, Maryasin, Vladimir, Kaminski-Cachopo, Anne, Fave, Alain, Gendry, Michel, INL - Hétéroepitaxie et Nanostructures (INL - H&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Photovoltaïque (INL - PV), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), INL - Spectroscopies et Nanomatériaux (INL - S&N), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation (IMEP-LAHC ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Gendry, Michel

Subjects
[SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, tandem solar cell, GaAs/AlGaAs NWs, patterned substrates
Abstract

International audience; Since LaPierre's first theorization of a nanowires (NWs)-based tandem solar cell (TSC) on Si substrate, 1 other theoretical studies have been carried out to investigate the high potentialities of such devices, 2 which can virtually reach an efficiency around 34 %. In spite of these very promising results, the research in this field has not yet developed that much on a practical level: to the best of our knowledge only one prototype of TSC has been realized so far by Yao et al, 3 and although not completely optimized, it reached the high conversion efficiency value of 11.4 %. Based on these considerations, we aimed to develop a fully optimized TSC capable to achieve higher efficiencies. 4 This consists in a top cell made of an ordered array of GaAs/AlGaAs core/shell NWs, with a radial p-in junction in the AlGaAs shell, directly grown on a bottom cell of Si(111), as shown in Figure 1(a). The optimization work has been carried out in different steps, i.e. theoretical simulations to identify the best set up for the array, optimization of the NW structure, composition and morphology, investigation for the most suitable passivation shell and growth on patterned substrates. The last point has notably lead to significant results, since we develop a protocol to obtain very high vertical yields (from 80 % to 90 %) of GaAs/AlGaAs core/shell NWs on large patterned areas (0.9 cm x 0.9 cm), as shown in Figure 1(b). Following these promising results, we are currently committed to using our ordered arrays of NWs for the fabrication of a TSC, now focusing our work on encapsulating and contacting the nanostructures: despite the complexity of the system, EBIC results in this respect (cf. V. Piazza's abstract) are encouraging and suggest that the realization of the TSC is at our fingertips. 5 Figure 1. (a) Scheme of the ultimate structure of the TSC. (b) Ordered array of p-GaAs core / p-in AlGaAs shell NWs on Si(111) with a high vertical yield (80-90 %); white scale bar corresponding to 2 µm.

Published
2018

121. Bright single InAs quantum dots at telecom wavelengths in conical tapered InP nanowires monolithically grown on Si

Author

Jaffal, Ali, Regreny, Philippe, Patriarche, Gilles, GENDRY, Michel, Chauvin, Nicolas, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), INL - Hétéroepitaxie et Nanostructures (INL - H&N), Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics]
Abstract

11-15 Juin 2018,; International audience

Published
2018

122. Optical and electronic properties in ferroelectric barium titanate-based compounds

Author

Infante, Ingrid C., Volkova, Halyna, Gemeiner, Pascale, Geneste, Gr��gory, Guillot, J��r��me, Frontera, Carlos, Banja, Nidal, Karolak, Fabienne, Bogicevic, Christine, Dkhil, Brahim, Chauvin, Nicolas, Lenoble, Damien, INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Laboratoire Structures, Propriétés et Modélisation des solides (SPMS), Institut de Chimie du CNRS (INC)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), 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), Luxembourg Institute of Science and Technology (LIST), Institut de Ciència de Materials de Barcelona (ICMAB), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), INL - Spectroscopies et Nanomatériaux (INL - S&N), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Centrale de Lyon (ECL), Université de Lyon, CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Condensed Matter - Materials Science, ferroics, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, multifunctional materials, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, mechanics, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

The bandgap energy values for the ferroelectric BaTiO3-based solid solutions with isovalent substitution Ba1-x SrxTiO3, BaZrxTi1-xO3 and BaSnxTi1-xO3 were determined using diffuse reflectance spectra. While the corresponding unit cell volume follows Vegard's law in accordance with the different ionic radii of the ionic substitutions, the bandgap values depict non-linear compositional dependences for all the solid solutions. The effect is considerably large for BaZrxTi1-xO3 and BaSnxTi1-xO3 solutions, depicting a bandgap linear compositional dependence up to x=0.6, for x>0.6 BaZrxTi1-xO3 compounds present much larger bandgap values than BaSnxTi1-xO3 counterparts. Electronic properties have been investigated through X-ray photoelectron spectroscopy in BaSnxTi1-xO3 compounds, indicating that the Sn 3d and Ti 2p core levels shift against the Ba 3d ones within the whole compositional range with the same energy trend as that observed for the optical bandgap. Since for Ba1-x SrxTiO3 compounds no major bandgap variation is observed, we conclude that the bandgap compositional dependences observed for BaSnxTi1-xO3 compounds and BaZrxTi1-xO3 ones are originated from the structural sensitivity of the O, Ti and Sn or Zr electronic bands involved in the bandgap transition of these compounds. With this work, we underline the reliability of the bandgap determined from diffuse reflectance spectrometry experiments, as a means to non-invasively evaluate the electronic properties of powder materials., THIRD SEMINAR ON THE MECHANICS OF MULTIFUNCTIONAL MATERIALS, Jun 2018, Bad-Honnef, Germany. 2018

Published
2018
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123. Beam Commissioning of the IFMIF EVEDA Very High Power RFQ

Author

Fagotti, Enrico, Antoniazzi, Loris, Bellan, Luca, Bortolato, Damiano, Comunian, Michele, Facco, Alberto, Giacchini, Mauro, Grespan, Francesco, Montis, Maurizio, Palmieri, Antonio, Pisent, Andrea, Scantamburlo, Francesco, Bolzon, Benoit, Chauvin, Nicolas, Gobin, Raphael, Cara, Philippe, Dzitko, Herve, Gex, Dominique, Jokinen Antti, Phillips, Guy, Ebisawa, Takashi, Kasugai, Atsushi, Kondo, Keitaro, Sakamoto, Keishi, Shinya, Takahiro, Sugimoto, Masayoshi, Heidinger, Roland, Marqueta, Alvaro, Moya martinez Ivan, Mereu, Paolo, Pruneri, Giuseppe, Weber, Moises, Francesco Scantamburlo, Benoit Bolzon, Alvaro Marqueta, and Giuseppe Pruneri

Abstract

IFMIF, the International Fusion Materials Irradiation Facility, is an accelerator-based neutron source that will use Li(d, xn) reactions to generate a flux of neutrons with a broad peak at 14 MeV equivalent to the conditions of the Deuterium-Tritium reactions in a fusion power plant. IFMIF is conceived for fusion materials testing. The IFMIF prototype linear accelerator (LIPAc) is jointly developed by Europe and Japan within the IFMIF EVEDA project: it is composed of an ion source, a LEBT, an RFQ, a MEBT and a SC linac, with a final energy of 9 MeV. The 4-vane Radio Frequency Quadrupole (RFQ), developed by INFN in Italy, will accelerate a 130 mA deuteron beam from 0.1 to 5 MeV in continuous wave, for a beam power of 650 kW. The 9.8 m long 175 MHz cavity is composed of 18 x 0.54 m long modules flanged together and aligned within 0.3 mm tolerance. The RFQ was completed, delivered and assembled at the Rokkasho site and is presently under extended RF tests. The second phase of beam commissioning (up to 2.5 MeV/u) was scheduled to start at the end of 2017. Several unexpected issues and incidents significantly delayed the original program, which is however proceeding step by step toward the full achievement of its goals., 9th International Particle Accelerator COnference - IPAC2018

Published
2018

124. Beam Dynamics Studies For the IFMIF-DONES SRF-Linac

Author

Du, Lei, Bazin, Nicolas, Chauvin, Nicolas, Chel, Stéphane, Plouin, Juliette, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
A17 High Intensity Accelerators, solenoid, cryomodule, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 0103 physical sciences, SRF, cavity, 04 Hadron Accelerators, linac, 010306 general physics, 01 natural sciences, 010305 fluids & plasmas, Accelerator Physics
Abstract

The DONES (DEMO oriented neutron source) project is aimed at constructing a DEMO of IFMIF to provide sufficient material damage [1]. In the SRF-Linac of this project, losses can cause harmful material activation and must be maintained much less than 1W/m. It's a challenge to keep losses at such a low level with high beam power and high space charge. This paper presents two designs of the DONES SRF-Linac, one with 4 cryomodules and another with 5 cryomodules. The design details to reduce the losses and the multi-particle simulation results will be shown. The errors studies for these results will also be discussed., Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada

Published
2018
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125. Beam Dynamics of the First Beams for IFMIF-EVEDA RFQ Commissioning

Author

Bellan, Luca, Akagi, Tomoya, Baltador, Carlo, Bolzon, Benoit, Chauvin, Nicolas, Comunian, Michele, Dzitko, Hervé, Fagotti, Enrico, Grespan, Francesco, Kondo, Keitaro, Pisent, Andrea, Podadera, Ivan, Scantamburlo, Francesco, Sugimoto, Masayoshi, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
D08 High Intensity in Linear Accelerators - Space Charge, Halos, solenoid, rfq, emittance, 05 Beam Dynamics and EM Fields, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], extraction, Accelerator Physics, proton
Abstract

The installation of the IFMIF-EVEDA RFQ, MEBT, LEBT, source and beam dump was completed in September 2017. The beam dynamics of the first beams for the IFMIF-EVEDA RFQ commissioning is presented. Moreover, a proposal for the CW RFQ steady state commissioning is shown, with a focus on the beam dynamics challenges of the beam transport after the RFQ., Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada

Published
2018
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126. Increase of IPHI Beam Power at CEA Saclay

Author

Senée, Franck, Ausset, Patrick, Belloni, Francesca, Ben Abdillah, Mohammed, Benedetti, Florian, Bolzon, Benoit, Chauvin, Nicolas, Desmons, Michel, Gauthier, Yannick, Giner-Demange, Emeline, Gomes, Adelino, Harrault, Francis, Joly, Christophe, Marchand, Claude, Marroncle, Jacques, Oublaid, Maryam, Papaevangelou, Thomas, Perreu, Gabrielle, Piquet, Olivier, Pottin, Bruno, Sauce, Yannick, Schwindling, Jerome, Segui, Laura, Touzery, Robert, Tuske, Olivier, Uriot, Didier, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
rfq, neutron, detector, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], T01 Proton and Ion Sources, 04 Hadron Accelerators, Accelerator Physics, target, proton
Abstract

For the first time, in April 2016, the SILHI source produced a proton beam for IPHI RFQ. Due to several technical difficulties on the RFQ water cooling skid, a short RF power pulse (100 μs at the beginning until few hundred microseconds) is injected into the RFQ accelerates the high intensity proton beam up to 3 MeV. The repetition rate is tuned between 1 and 5 Hz. Under these conditions, the beam power after the RFQ is lower than 100 W. At the end of 2017, the 352 MHz RFQ conditioning has been completed (with the same duty cycle) and the proton beam has been accelerated. The increase of the beam power is expected to continue in 2018 in order to reach several kilowatts by the end of the year. In addition, two Ionization beam Profile Monitors (IPM) developed for ESS have been tested on the deviated beam line with a very low duty cycle. The IPHI facility should demonstrate the possibility to produce neutrons with a flexible compact accelerator in the framework of the SONATE project. This paper presents the status of the IPHI project in April 2018., Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada

Published
2018
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127. Photoferroelectric solid solutions: the Ba (Sn,Ti)O3 case

Author

Volkona, H., Nukala, P., Gemeiner, P., Guillot, J., Lenoble, P., Chauvin, Nicolas, Karolak, Fabienne, Bogicevic, Christine, Dkhil, B., C.Infante, I., Laboratoire Structures, Propriétés et Modélisation des solides (SPMS), Institut de Chimie du CNRS (INC)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), INL - Dispositifs Electroniques (INL - DE), and roussel, claire

Subjects
[PHYS]Physics [physics], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat], [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract

International audience

Published
2018

128. The evolution of AMULSE (Atmospheric Measurements by Ultra-Light Spectrometer) and its interest in atmospheric applications. Results of the Atmospheric Profiles Of GreenhousE gasEs (APOGEE) weather balloon release campaign for satellite retrieval validation

Author

Joly, Lilian, primary, Coopmann, Olivier, additional, Guidard, Vincent, additional, Decarpenterie, Thomas, additional, Dumelié, Nicolas, additional, Cousin, Julien, additional, Burgalat, Jérémie, additional, Chauvin, Nicolas, additional, Albora, Grégory, additional, Maamary, Rabih, additional, Miftah El Khair, Zineb, additional, Tzanos, Diane, additional, Barrie, Joël, additional, Moulin, Eric, additional, Aressy, Patrick, additional, and Belleudy, Anne, additional

Published
2019
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129. Beam Induced Fluorescence Measurements of 100 keV Deuterons in LIPAc Accelerator

Author

Varela, Rodrigo, Akagi, Tomoya, Bolzon, Benoit, Cara, Philippe, Chauvin, Nicolas, Dzitko, Hervé, Guirao, Angel, Ichimiya, Ryo, Ikeda, Yukiharu, Knaster, Juan, Martínez, Luis, Mollá, Joaquin, Podadera, Ivan, Sugimoto, Masayoshi, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
electron, injection, emittance, detector, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], T03 Beam Diagnostics and Instrumentation, 06 Beam Instrumentation, Controls, Feedback, and Operational Aspects, 7. Clean energy, plasma, Accelerator Physics
Abstract

The LIPAc accelerator will be a linear CW deuteron accelerator capable of delivering a 9 MeV, 125 mA beam which aims to validate the technology that will be used in the future high power accelerator-driven neutron source, IFMIF. In summer 2017 a campaign of measurements was done during the injector commissioning, in which a Fluorescence Profile Monitor based on an Intensified CID camera (ICID) was used to measure the beam transverse profile at the extraction of the ion source. In this contribution we review the design of the ICID, its performance and discuss the measurements carried out. The performance of ICID monitors for its use in future accelerators will be assessed., Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada

Published
2018
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130. Optical Polarization Properties of Wurtzite InP and InAs/InP Nanowires Grown on Silicon(111)

Author

Chauvin, Nicolas, Jaffal, Ali, MAVEL, Amaury, Regreny, Philippe, Patriarche, G., GENDRY, Michel, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Hétéroepitaxie et Nanostructures (INL - H&N), Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)

Subjects
[PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

13-15 Novembre 2017,; International audience; no abstract

Published
2017

131. Optical Investigation of the Band Structure in Wurtzite InP Nanowires

Author

Chauvin, Nicolas, Mavel, Amaury, Patriarche, G., Masenelli, Bruno, Machon, D., Gendry, Michel, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), INL - Hétéroepitaxie et Nanostructures (INL - H&N), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Institut Lumière Matière [Villeurbanne] (ILM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, INL - Spectroscopies et Nanomatériaux ( INL - S&N ), Institut des Nanotechnologies de Lyon ( INL ), École Centrale de Lyon ( ECL ), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon ( CPE ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ) -École Centrale de Lyon ( ECL ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), INL - Hétéroepitaxie et Nanostructures ( INL - H&N ), Laboratoire de photonique et de nanostructures ( LPN ), Centre National de la Recherche Scientifique ( CNRS ), Institut Lumière Matière [Villeurbanne] ( ILM ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), and Inl, Laboratoire INL UMR5270

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS ] Physics [physics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [ SPI.MAT ] Engineering Sciences [physics]/Materials, [SPI.MAT] Engineering Sciences [physics]/Materials, [PHYS] Physics [physics], [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [ SPI.NANO ] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [ SPI.OPTI ] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2017

132. Nanoscale investigation of radial p-n junction in self-catalyzed GaAs nanowires grown on Si (111)

Author

PIAZZA, V., VETTORI, Marco, Ahmed, A., Chauvin, Nicolas, Regreny, Philippe, Patriarche, G., Fave, Alain, GENDRY, Michel, Tchernycheva, M., Centre de Nanosciences et de Nanotechnologies [Orsay] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, INL - Hétéroepitaxie et Nanostructures (INL - H&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Photovoltaïque (INL - PV), INL - Spectroscopies et Nanomatériaux (INL - S&N), Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)

Subjects
[PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; no abstract

Published
2017

133. Commissioning of the MYRRHA Low Energy Beam Transport Line and Space Charge Compensation Experiments

Author

Bouly, FréDéRic, Baylac, Maud, Belmans, Jorik, Bondoux, Dominique, Chauvin, Nicolas, Gérardin, FréDéRic, Vandeplassche, Dirk, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Centre d'Etude de l'Energie Nucléaire (SCK-CEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Accelerator Physics, 04 Hadron Accelerators, 7. Clean energy, Accelerator Physics
Abstract

The MYRRHA project aims at the construction of a new research reactor in Mol (Belgium) to demonstrate the nuclear waste transmutation feasibility with an Accelerator Driven System (ADS). In its subcritical configuration, the MYRRHA facility requires a proton beam with a maximum power of 2.4 MW (600 MeV - 4 mA). Such a continuous wave beam will be delivered by a superconducting linear accelerator (linac) which must fulfil very stringent reliability requirements to ensure the safe ADS operation with a high level of availability. The linac injector will be composed of: a proton source, a low energy beam transport line (LEBT), a 176 MHz RFQ and CH-DTL cavities. The LEBT prototype has been built and is presently installed and operated at LPSC Grenoble (France). An experimental program, to optimise the tuning of the line, the beam transport, and to study the space charge compensation mechanism, is in progress. We here review the main achievements of the LEBT commissioning. Experimental results will be presented and discussed, in particular the influence of the residual gas (type and pressure) on the beam dynamics., Proceedings of the 8th Int. Particle Accelerator Conf., IPAC2017, Copenhagen, Denmark

Published
2017
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134. InAs quantum dot in a needlelike tapered InP nanowire: a telecom band single photon source monolithically grown on silicon

Author

Jaffal, Ali, primary, Redjem, Walid, additional, Regreny, Philippe, additional, Nguyen, Hai Son, additional, Cueff, Sébastien, additional, Letartre, Xavier, additional, Patriarche, Gilles, additional, Rousseau, Emmanuel, additional, Cassabois, Guillaume, additional, Gendry, Michel, additional, and Chauvin, Nicolas, additional

Published
2019
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135. Nanoscale analyses of axial and radial III-V nanowires for solar cells (Conference Presentation)

Author

Piazza, Valerio, primary, Chalermchai, Himwas, additional, Saket, Omar, additional, Vettori, Marco, additional, Ali, Ahmed, additional, Julien, François H., additional, Chauvin, Nicolas, additional, Régreny, Philippe, additional, Fave, Alain, additional, Gendry, Michel, additional, Patriarche, Gilles, additional, Rale, Pierre, additional, Oehler, Fabrice, additional, Collin, Stéphane, additional, Harmand, Jean-Chirstophe, additional, and Tchernycheva, Maria, additional

Published
2018
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136. Electroluminescence of Colloidal Quantum Dots in Electrical Contact with Metallic Nanoparticles

Author

Wang, Hongyue, Le-Van, Quynh, Aassime, Abdelhanin, Le Roux, Xavier, Charra, Fabrice, Chauvin, Nicolas, Degiron, Aloyse, Aassime, X, Roux, Xavier le, Centre de Nanosciences et de Nanotechnologies [Orsay] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Laboratoire d'Electronique et nanoPhotonique Organique (LEPO), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Quenching, [PHYS]Physics [physics], Materials science, business.industry, Surface plasmon, Metamaterial, Nanoparticle, Physics::Optics, 02 engineering and technology, Electroluminescence, 021001 nanoscience & nanotechnology, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electrical contacts, Electronic, Optical and Magnetic Materials, 0103 physical sciences, Optoelectronics, Light emission, 0210 nano-technology, business, Quantum
Abstract

International audience; The electroluminescence of a carpet of colloidal quantum dots in electrical contact with a metal nanoparticle array is investigated. The properties of the structures spectacularly differ from the well-known behavior of point sources placed at nonvanishing distances from subwavelength scatterers (robustness to quenching, coupling primarily defined by the electrical contact between the two species, etc.). This regime of short-range interactions can even be enabled with nonplasmonic inclusions made of platinum, providing an extreme case of enhanced and tailored light emission by quantum emitters in a highly absorptive environment. As a corollary, surface plasmons are not a necessary or sufficient ingredient but add functionalities that nonplasmonic structures do not possess. These findings indicate that the physics of localized light emitters in highly inhomogeneous environments is far from being fully understood and have important implications for the next generation of active metamaterials and advanced optoelectronic devices.

Published
2017
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137. Source and LEBT Beam Preparation for IFMIF-EVEDA RFQ

Author

Bellan, Luca, Beauvais, Pierre-Yves, Bolzon, Benoit, Cara, Philippe, Chauvin, Nicolas, Comunian, Michele, Dzitko, Hervé, Fagotti, Enrico, Gobin, Raphael, Grespan, Francesco, Ichimiya, Ryo, Kasugai, Atsushi, Marqueta, Alvaro, Pisent, Andrea, Scantamburlo, Francesco, Senée, Franck, Sugimoto, Masayoshi, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
solenoid, 010302 applied physics, emittance, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 4 Beam Dynamics, Extreme Beams, Sources and Beam Related Technology, 02 engineering and technology, simulation, 021001 nanoscience & nanotechnology, 01 natural sciences, Accelerator Physics, rfq, injection, 0103 physical sciences, 0210 nano-technology
Abstract

The commissioning phase of the IFMIF-EVEDA RFQ requires a complete beam characterization with simula-tions and measurements of the beam input from the IFMIF-EVEDA ion source and LEBT, in order to reach the RFQ input beam parameters. In this article, the simula-tions results of the complex source-LEBT with the corre-sponding set of measurements and their impact on the commissioning plan will be reported., Proceedings of the 28th Linear Accelerator Conf., LINAC2016, East Lansing, MI, USA

Published
2017
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138. Acylation of the Type 3 Secretion System Translocon Using a Dedicated Acyl Carrier Protein

Author

Viala, Julie, Prima, Valerie, Puppo, Remy, Agrebi, Rym, Canestrari, Mickael J., Lignon, Sabrina, Chauvin, Nicolas, Meresse, Stephane, Mignot, Tam, Lebrun, Regine, Bouveret, Emmanuelle, Laboratoire d'ingénierie des systèmes macromoléculaires (LISM), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Aix Marseille Université (AMU), Plateforme Protéomique [Marseille], Institut de Microbiologie de la Méditerranée (IMM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie bactérienne (LCB), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Centre d'Immunologie de Marseille - Luminy (CIML), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), European Project: 261105,EC:FP7:ERC,ERC-2010-StG_20091118,DOME(2011), and Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Salmonella typhimurium, Bacterial Diseases, Acylation, Cell Membranes, Secretion Systems, Pathology and Laboratory Medicine, Biochemistry, Salmonella, Microbial Physiology, Type III Secretion Systems, Medicine and Health Sciences, Bacterial Physiology, Post-Translational Modification, Amino Acids, Organic Compounds, Fatty Acids, Acetylation, Lipids, Bacterial Pathogens, Chemistry, Infectious Diseases, Medical Microbiology, Physical Sciences, [SDE]Environmental Sciences, lipids (amino acids, peptides, and proteins), Pathogens, Cellular Structures and Organelles, Research Article, lcsh:QH426-470, Virulence Factors, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, Biosynthesis, Microbiology, Bacterial Proteins, Enterobacteriaceae, Acyl Carrier Protein, Sulfur Containing Amino Acids, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Cysteine, Microbial Pathogens, [SDV.GEN]Life Sciences [q-bio]/Genetics, Bacteria, Organic Chemistry, Organisms, Chemical Compounds, Membrane Proteins, Biology and Life Sciences, Proteins, Bacteriology, Cell Biology, Chaperone Proteins, lcsh:Genetics, Protein Processing, Post-Translational
Abstract

Bacterial pathogens often deliver effectors into host cells using type 3 secretion systems (T3SS), the extremity of which forms a translocon that perforates the host plasma membrane. The T3SS encoded by Salmonella pathogenicity island 1 (SPI-1) is genetically associated with an acyl carrier protein, IacP, whose role has remained enigmatic. In this study, using tandem affinity purification, we identify a direct protein-protein interaction between IacP and the translocon protein SipB. We show, by mass spectrometry and radiolabelling, that SipB is acylated, which provides evidence for a modification of the translocon that has not been described before. A unique and conserved cysteine residue of SipB is identified as crucial for this modification. Although acylation of SipB was not essential to virulence, we show that this posttranslational modification promoted SipB insertion into host-cell membranes and pore-forming activity linked to the SPI-1 T3SS. Cooccurrence of acyl carrier and translocon proteins in several γ- and β-proteobacteria suggests that acylation of the translocon is conserved in these other pathogenic bacteria. These results also indicate that acyl carrier proteins, known for their involvement in metabolic pathways, have also evolved as cofactors of new bacterial protein lipidation pathways., Author Summary Acyl carrier proteins are small ubiquitous proteins involved in the synthesis of hydrocarbon based molecules. Notably, they are essential for the synthesis of fatty acids, which are the precursors of membrane phospholipids. They can also be involved in secondary metabolism, for example for the synthesis of molecules with antibacterial properties. Although acyl carrier proteins are widespread, the specific role of each individual protein seems comparatively poorly explored. In this study, we investigate the role of an acyl carrier protein genetically associated with a type 3 secretion system (T3SS). Many Gram-negative bacterial pathogens use T3SS to deliver effectors directly into the cytoplasm of eukaryotic host cells and to subvert host cellular pathways. For this purpose, the translocon, which is the terminal part of T3SS, forms a pore inserted into the host-cell membrane. Here we show that the acyl carrier protein associated with the T3SS has specialized to allow acylation of the translocon. The novel posttranslational modification of the translocon that we describe optimizes insertion into the host-cell membrane and pore-forming activity. This mechanism is likely to be conserved in other pathogenic bacteria given the conserved genetic association between T3SS and acyl carrier protein in several bacteria.

Published
2017
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139. ThinkHazard! – Giving decision makers access to multi-hazard information for safer projects

Author

Taillefer, Nicolas, Fraser, S, Burzel, A, Chauvin, Nicolas, Hohmann, Audrey, Simpson, A, Nunez, A, Deparday, V, Morel, Olivier, Kuijper, M, Vermooten, S, Winsemius, H, Jacon, F, Giraud, P, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), GFDRR Innovation Lab, DELTARES (DELTARES), DELTARES, and Camptocamp

Subjects
screening, planning, development, [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology, risk reduction, Hazard, decisions
Abstract

International audience; Building a safer society requires accurate information about natural hazards. Many countries are affected by multiple hazards, which need to be considered carefully in development projects like infrastructure, construction, educational or agricultural programs. When defining programs or planning investments, it is of great importance to be aware of potential natural threats that could adversely affect projects during their lifetime. Considering the impact of climate change, it is also vital to anticipate future evolution of these hazards in a context of changing conditions. One of the major challenges to ensure sustainable development is to engage in disaster and climate proof approaches at early stages of the projects. A step forward this purpose is achieved when decision makers can access to easily understandable and reliable information on hazards as well as recommendations about how to translate this knowledge into appropriate actions for their project. The Global Facility for Disaster Reduction and Recovery developed a new hazard screening tool named ThinkHazard! to contribute to bridging the gap between existing scientific knowledge and decision makers " practical need. It consists in an open-source, simple and robust online tool that provides the hazard level at the user " s location for eight widely encountered hazards. The tool also releases first level information on how to cope with hazards in projects " early decisions, and guides the users to other sources of more detailed information about hazards and risk management good practices.

Published
2016

140. Phase-Space Transformation for a Uniform Target Irradiation at DONES

Author

Oliver, Concepcion, Cara, Philippe, Chauvin, Nicolas, Gallego, Ana, Ibarra, Angel, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
octupole, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 4 Beam Dynamics, Extreme Beams, Sources and Beam Related Technology, simulation, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, Accelerator Physics, target, neutron, 0103 physical sciences, Physics::Accelerator Physics, space-charge, 010306 general physics
Abstract

In the framework of the EU Roadmap, a DEMO Oriented Neutron Source (DONES) [*] has been proposed to provide a high neutron intense neutron source with a suitable neutron spectrum to understand the degradation of advanced materials under DEMO and future fusion plants irradiation conditions. DONES will be based on the International Fusion Materials Irradiation Facility IFMIF [**], being only one accelerator considered. The HEBT will be devoted to the transport, bending and shaping of the 40 MeV, 125 mA CW deuteron beam to the free surface of the rapidly flowing lithium target. To produce a forward peaked source of fusion-like neutrons, which stream through the target into the test cell, a rectangular uniform distribution across the flat top of the beam profile is required, being the footprint tailored in both the vertical and horizontal directions according to the target design. Different methods for beam uniformization in IFMIF accelerator has been proposed in the past [***]. Two main concerns in DONES will be the minimization of particle losses over the whole HEBT and the effect of the different shaping techniques on such strong space charge regime, specially on the beam halo modulation. A review of the different methods for the beam shaping of the high power, high space charge DONES HEBT beam will be depicted. A final solution will be proposed., Proceedings of the 28th Linear Accelerator Conf., LINAC2016, East Lansing, MI, USA

Published
2016
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141. Intermediate Commissioning Results of the Required 140 mA/100 keV CW D⁺ ECR Injector of LIPAc, IFMIF's Prototype

Author

Bolzon, Benoit, Beauvais, Pierre-Yves, Bellan, Luca, Cara, Philippe, Chauvin, Nicolas, Comunian, Michele, Dzitko, Hervé, Fagotti, Enrico, Gobin, Raphael, Harrault, Francis, Heidinger, Roland, Ichimiya, Ryo, Ihara, Akira, Kasugai, Atsushi, Kitano, Toshihiko, Knaster, Juan, Komata, Masao, Kondo, Keitaro, Marqueta, Alvaro, Nishiyama, Koichi, Okumura, Yoshikazu, Pisent, Andrea, Pruneri, Giuseppe, Sakamoto, Keishi, Scantamburlo, Francesco, Senée, Franck, Shinya, Takahiro, Sugimoto, Masayoshi, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
rfq, emittance, MMI, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 0103 physical sciences, ion, 010306 general physics, 01 natural sciences, Beam extraction and optics, plasma, 010305 fluids & plasmas, Accelerator Physics
Abstract

The LIPAc accelerator aims to operate in Rokkasho Fusion Institute a 125 mA/CW deuteron beam at 9 MeV to validate the concept of IFMIF's accelerators that will operate in CW 125 mA at 40 MeV. The 2.45 GHz ECR injector developed by CEA-Saclay is designed to deliver 140 mA/100 keV CW D⁺ beam with 99% D⁺ fraction ratio. Its LEBT relies on a dual solenoid focusing system to transport and match the beam into the RFQ. The normalized RMS emittance at the RFQ injection cone is required to be within 0.25π mm·mrad to allow 96% transmission through the 9.81 m long RFQ. An equal perveance H⁺ beam of half current and half energy as nominal with D⁺ is used to avoid activation during commissioning. The injector commissioning at Rokkasho is divided into three phases to characterize the emittance between the two solenoids of the LEBT (A1) and just downstream the RFQ injection cone (A2) and the extraction system of the source (A3). Phase A1 has been achieved and phase A2 continues in 2016 in order to reach the required beam parameters and to match the beam into the RFQ. This paper reports the commissioning results of phase A1 and the intermediate ones of phase A2 for H⁺ and D⁺ beams., Proceedings of the 22nd Int. Workshop on ECR Ion Sources, ECRIS2016, Busan, Korea

Published
2016
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142. Commissioning of the High Intensity Proton Injector of the Facility for Anti Proton and Ion Research at CEA-Saclay

Author

Tuske, Olivier, Ameil, Frederic, Berezov, Rustam, Chauvin, Nicolas, Delferrière, Olivier, Fils, Jérôme, Gauthier, Yannick, Girardot, Patrick, Hollinger, Ralph, Misiara, Nicolas, Sauce, Yannick, Senée, Franck, Simon, Claire, Vacher, Thierry, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
solenoid, Status reports and new development, p: linear accelerator, Physics::Instrumentation and Detectors, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], beam transport, particle source: design, 7. Clean energy, microwaves, Accelerator Physics, ion: particle source, diagnostics, Physics::Accelerator Physics, beam: injection, Darmstadt GSI FAIR, beam: pulsed, ion, performance, activity report, plasma, acceptance, proton
Abstract

The Facility for Antiproton and Ion Research (FAIR) located at GSI (Darmstadt) in Germany addresses several fields of physics research within a single installation. One of the contribution of Irfu/SACM at CEA-Saclay to the FAIR linear proton accelerator concerns the development and construction of the ion source and the low energy line. The 2.45 GHz microwave ion source will deliver a 100 mA H⁺ beam pulsed at 4 Hz with an energy of 95 keV. A low energy beam transport (LEBT) line based on a dual solenoids focusing scheme allows the injection of the proton beam into the radio frequency quadrupole (RFQ) within an acceptance of 0.3π mm.mrad (norm., rms). An electrostatic chopper system located between the second solenoid and the RFQ is used to cut the beam macro pulse from the source to inject 36 μs long beam pulses into the RFQ. This article reports the finalization of the installation of the injector with the detail of dedicated diagnostics, the first beam measurements and gives a planning of the different commissioning phases, Proceedings of the 22nd Int. Workshop on ECR Ion Sources, ECRIS2016, Busan, Korea

Published
2016
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143. The Spatial Data Infrastructure for the Geological Reference of France

Author

Urvois, Marc, Baudin, Thierry, Cagnard, Florence, Calcagno, Philippe, Chauvin, Nicolas, Clain, Ulrich, Gabillard, Santiago, Grataloup, Sandrine, Grellet, Sylvain, Issautier, Benoît, Lacquement, Frédéric, Le Bayon, Benjamin, Lyonnais, François, Marquant, Alain, Nehlig, Pierre, Rambourg, Damien, Ricordel-Prognon, Caroline, Roquencourt, Jean-Baptiste, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Agence de l'Eau Loire Bretagne, and GFI Informatique

Subjects
[SHS.INFO]Humanities and Social Sciences/Library and information sciences, [INFO.INFO-WB]Computer Science [cs]/Web, spatial data infrastructure, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, interoperability, France, Geological reference, 3D modelling
Abstract

International audience; As a continuation of the national programme of geological map of France at 1:50,000, the French Geological Survey (BRGM) engaged in the Geological Reference of France (Référentiel Géologique de la France, RGF). Over the next decades, this programme aims at developing a three dimensional knowledge of the eleven different geological regions through a continuous, homogeneous and consistent description permanently updated as well as understanding the mechanisms governing their evolution over time.All existing and newly acquired information, currently in the Pyrenees, are integrated within the RGF spatial data infrastructure (SDI). It provides the associated scientific programme with the necessary information system (data structure, computer means, applications and tools) to meet the various needs of contributors and end-users, from acquisition to dissemination of public data and knowledge. The RGF SDI must deliver the best available geological information over the territory, whatever the producer, i.e. research works, applied geology projects, both internal and external to the RGF programme. It must also abide by French and European legislation in terms of interoperability and open access to public data.The quality and reliability of the data and knowledge capitalised in the RGF SDI are primarily based on a thematic reference system including detailed lithostratigraphy, chronostratigraphy, structures and geological events. Both 2D and 3D geometries are also part of the references so that the RGF SDI can be used by other information systems e.g. hydrogeology, mineral resources and geohazards. This involves a dedicated architecture of data sets and applications as well as innovative data structures to capture the complexity of the geological objects and processes. A description-oriented method was used for building original master data sets from textual descriptions in natural language. For example, it was applied to lithology and also its transformation by diagenesis, metamorphism or supergene alteration, as many sub-processes of the event references. This essential foundation for a consistent description and interpretation in 2D-3D is associated to validation workflows involving the RGF Scientific Committee. Several data status i.e. input/proposed/ labelled/disseminated allow to manage appropriately the access and publication of the RGF data and references both within the RGF community and to the public.The multi-stakeholder dimension of RGF drives the technical implementation through a collaborative approach of the SDI platform. It complies with the European INSPIRE Directive while offering a series of web services based on GeoSciML. This enables the RGF SDI contents to be disseminated both through web-enabled geoscientific portals (rgf.brgm.fr) and data processing tools.

Published
2016

144. Growth of core (GaAs) / shell (functional oxide) nanowires

Author

Guan, Xin, Becdelievre, Jeanne, Meunier, Benjamin, Benali, Abdennacer, Saint-Girons, Guillaume, Bachelet, Romain, Regreny, Philippe, Botella, Claude, Grenet, Geneviève, Blanchard, Nicholas, Jaurand, X., Silly, M., Sirotti, F., Chauvin, Nicolas, Gendry, Michel, Penuelas, José, INL - Hétéroepitaxie et Nanostructures (INL - H&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre Technologique des Microstructures (CTµ), Université de Lyon-Université de Lyon, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), INL - Spectroscopies et Nanomatériaux (INL - S&N), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), and Inl, Laboratoire INL UMR5270

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [PHYS] Physics [physics], [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

May, 16-19, 2016; International audience; no abstract

Published
2016

145. Photocarrier Dynamics in Pure Wurtzite InP Nanowires probed by optical-pump terahertz-probe measurement

Author

Morris, D., Dion, G., Mavel, Amaury, Chauvin, Nicolas, Gendry, Michel, Université de Sherbrooke (UdeS), INL - Hétéroepitaxie et Nanostructures (INL - H&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Spectroscopies et Nanomatériaux (INL - S&N), and Inl, Laboratoire INL UMR5270

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Abstract

May 14-18, 2016; International audience; no abstract

Published
2016

146. Space Charge Compensation in Low Energy Beam Lines

Author

Gérardin, Frédéric, Baylac, Maud, Bondoux, Dominique, Bouly, Frédéric, Chancé, Antoine, Chauvin, Nicolas, Napoly, Olivier, Pichoff, Nicolas, Uriot, Didier, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)

Subjects
electron, solenoid, 05 Beam Dynamics and Electromagnetic Fields, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Accelerator Physics, space-charge, simulation, 7. Clean energy, Accelerator Physics, proton
Abstract

The dynamics of a high intensity beam with low energy is governed by its space-charge forces which may be responsible of emittance growth and halo formation due to their non-linearity. In a low energy beam transport (LEBT) line of a linear accelerator, the propagation of a charged beam with low energy causes the production of secondary particles created by the interaction between the beam and the background gas present in the accelerator tube. This phenomenon called space-charge compensation is difficult to characterize analitically. In order to obtain some quantitative to characterize the space-charge compensation (or neutralization), numerical simulations using a 3D PIC code have been implemented., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea

Published
2016
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148. Nanoscale investigation of a radial p–n junction in self-catalyzed GaAs nanowires grown on Si (111)

Author

Piazza, Valerio, primary, Vettori, Marco, additional, Ahmed, Ahmed Ali, additional, Lavenus, Pierre, additional, Bayle, Fabien, additional, Chauvin, Nicolas, additional, Julien, François H., additional, Regreny, Philippe, additional, Patriarche, Gilles, additional, Fave, Alain, additional, Gendry, Michel, additional, and Tchernycheva, Maria, additional

Published
2018
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150. Optical properties of strained wurtzite InP nanowires

Author

Chauvin, Nicolas, Mavel, Amaury, Patriarche, G., Masenelli, Bruno, Gendry, Michel, Machon, D., INL - Spectroscopies et Nanomatériaux ( INL - S&N ), Institut des Nanotechnologies de Lyon ( INL ), École Centrale de Lyon ( ECL ), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon ( CPE ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ) -École Centrale de Lyon ( ECL ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), INL - Hétéroepitaxie et Nanostructures ( INL - H&N ), Laboratoire de photonique et de nanostructures ( LPN ), Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique de la Matière Condensée et Nanostructures ( LPMCN ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Hétéroepitaxie et Nanostructures (INL - H&N), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-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)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, and Inl, Laboratoire INL UMR5270

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [ SPI ] Engineering Sciences [physics], [ SPI.NANO ] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [ SPI.OPTI ] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Abstract

June 20-22, 2016; International audience; no abstract

Published
2016

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