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Search Results: 1 - 10 of 461882 matches for " A. Onillon "
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Ethnographic practice and public aid. Methods and meanings in development cooperation, Sten Hagberg & Charlotta Widmark (éds)
Damien Onillon
Moussons : Recherche en Sciences Humaines sur l’Asie du Sud-Est , 2011,
Abstract: Cet ouvrage est composé d’une introduction et de onze chapitres qui analysent à travers divers cas d’étude les aspects pratiques, méthodologiques et théoriques du travail des anthropologues impliqués dans l’aide publique et la coopération pour le développement. édité par Sten Hagberg et Charlotta Widmark en 2009, il est issu d’une conférence intitulée Anthropology in Practice : Theory, method and ethnography in swedish development cooperation , tenue en 2006 à l’université d’Uppsala. L’idé...
Breeds of Empire. The Invention of the Horse in Southeast Asia and Southern Africa 1500-1950, Greg Bankoff & Sandra Swart (éds)
Damien Onillon
Moussons : Recherche en Sciences Humaines sur l’Asie du Sud-Est , 2010,
Abstract: Cet ouvrage collectif dirigé par Greg Bankoff et Sandra Swart regroupe neuf contributions, divisées en deux parties, d’historiens spécialisés en histoire environnementale, économique ou sociale et d’une anthropologue. Chacune de ces contributions s’intéresse à l’introduction et à l’invention de nouvelles espèces de chevaux en Asie du Sud-Est en général, et particulièrement en Tha lande, en Indonésie et aux Philippines, mais aussi en Afrique du Sud. Cette introduction s’effectue dans le co...
Reactor Simulation for Antineutrino Experiments using DRAGON and MURE
C. L. Jones,A. Bernstein,J. M. Conrad,Z. Djurcic,M. Fallot,L. Giot,G. Keefer,A. Onillon,L. Winslow
Physics , 2011, DOI: 10.1103/PhysRevD.86.012001
Abstract: Rising interest in nuclear reactors as a source of antineutrinos for experiments motivates validated, fast, and accessible simulations to predict reactor fission rates. Here we present results from the DRAGON and MURE simulation codes and compare them to other industry standards for reactor core modeling. We use published data from the Takahama-3 reactor to evaluate the quality of these simulations against the independently measured fuel isotopic composition. The propagation of the uncertainty in the reactor operating parameters to the resulting antineutrino flux predictions is also discussed.
New antineutrino energy spectra predictions from the summation of beta decay branches of the fission products
M. Fallot,S. Cormon,M. Estienne,A. Algora,V. M. Bui,A. Cucoanes,M. Elnimr,L. Giot,D. Jordan,J. Martino,A. Onillon,A. Porta,G. Pronost,A. Remoto,J. L. Taín,F. Yermia,A. -A. Zakari-Issoufou
Physics , 2012, DOI: 10.1103/PhysRevLett.109.202504
Abstract: In this paper, we study the impact of the inclusion of the recently measured beta decay properties of the $^{102;104;105;106;107}$Tc, $^{105}$Mo, and $^{101}$Nb nuclei in an updated calculation of the antineutrino energy spectra of the four fissible isotopes $^{235, 238}$U, and $^{239,241}$Pu. These actinides are the main contributors to the fission processes in Pressurized Water Reactors. The beta feeding probabilities of the above-mentioned Tc, Mo and Nb isotopes have been found to play a major role in the $\gamma$ component of the decay heat of $^{239}$Pu, solving a large part of the $\gamma$ discrepancy in the 4 to 3000\,s range. They have been measured using the Total Absorption Technique (TAS), avoiding the Pandemonium effect. The calculations are performed using the information available nowadays in the nuclear databases, summing all the contributions of the beta decay branches of the fission products. Our results provide a new prediction of the antineutrino energy spectra of $^{235}$U, $^{239,241}$Pu and in particular of $^{238}$U for which no measurement has been published yet. We conclude that new TAS measurements are mandatory to improve the reliability of the predicted spectra.
Reactor Neutrino Flux Uncertainty Suppression on Multiple Detector Experiments
Andi Cucoanes,Pau Novella,Anatael Cabrera,Muriel Fallot,Anthony Onillon,Michel Obolensky,Frederic Yermia
Physics , 2015,
Abstract: This publication provides a coherent treatment for the reactor neutrino flux uncertainties suppression, specially focussed on the latest $\theta_{13}$ measurement. The treatment starts with single detector in single reactor site, most relevant for all reactor experiments beyond $\theta_{13}$. We demonstrate there is no trivial error cancellation, thus the flux systematic error can remain dominant even after the adoption of multi-detector configurations. However, three mechanisms for flux error suppression have been identified and calculated in the context of Double Chooz, Daya Bay and RENO sites. Our analysis computes the error {\it suppression fraction} using simplified scenarios to maximise relative comparison among experiments. We have validated the only mechanism exploited so far by experiments to improve the precision of the published $\theta_{13}$. The other two newly identified mechanisms could lead to total error flux cancellation under specific conditions and are expected to have major implications on the global $\theta_{13}$ knowledge today. First, Double Chooz, in its final configuration, is the only experiment benefiting from a negligible reactor flux error due to a $\sim$90\% geometrical suppression. Second, Daya Bay and RENO could benefit from their partial geometrical cancellation, yielding a potential $\sim$50\% error suppression, thus significantly improving the global $\theta_{13}$ precision today. And third, we illustrate the rationale behind further error suppression upon the exploitation of the inter-reactor error correlations, so far neglected. So, our publication is a key step forward in the context of high precision neutrino reactor experiments providing insight on the suppression of their intrinsic flux error uncertainty, thus affecting past and current experimental results, as well as the design of future experiments.
Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz
Y. Abe,C. Aberle,J. C. dos Anjos,J. C. Barriere,M. Bergevin,A. Bernstein,T. J. C. Bezerra,L. Bezrukhov,E. Blucher,N. S. Bowden,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,P. Chimenti,T. Classen,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadon,K. Crum,A. Cucoanes,M. V. D'Agostino,E. Damon,J. V. Dawson,S. Dazeley,D. Dietrich,Z. Djurcic,M. Dracos,V. Durand,J. Ebert,Y. Efremenko,M. Elnimr,A. Erickson,A. Etenko,M. Fallot,M. Fechner,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,A. J. Franke,M. Franke,H. Furuta,R. Gama,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,J. TM. Goon,D. Greiner,N. Haag,S. Habib,C. Hagner,T. Hara,F. X. Hartmann,J. Haser,A. Hatzikoutelis,T. Hayakawa,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,C. L. Jones,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,G. Keefer,E. Kemp,H. de Kerret,Y. Kibe,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,C. Langbrandtner,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. Lopez-Castano,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,D. McKee,J. Maeda,C. N. Maesano,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,M. Meyer,T. Miletic,R. Milincic,H. Miyata,Th. A. Mueller,Y. Nagasaka,K. Nakajima,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,I. Ostrovskiy,C. Palomares,I. M. Pepe,S. Perasso,P. Perrin,P. Pfahler,A. Porta,W. Potzel
Physics , 2012, DOI: 10.1103/PhysRevD.87.011102
Abstract: Double Chooz is unique among modern reactor-based neutrino experiments studying $\bar \nu_e$ disappearance in that data can be collected with all reactors off. In this paper, we present data from 7.53 days of reactor-off running. Applying the same selection criteria as used in the Double Chooz reactor-on oscillation analysis, a measured background rate of 1.0$\pm$0.4 events/day is obtained. The background model for accidentals, cosmogenic $\beta$-$n$-emitting isotopes, fast neutrons from cosmic muons, and stopped-$\mu$ decays used in the oscillation analysis is demonstrated to be correct within the uncertainties. Kinematic distributions of the events, which are dominantly cosmic-ray-produced correlated-background events, are provided. The background rates are scaled to the shielding depths of two other reactor-based oscillation experiments, Daya Bay and RENO.
First Measurement of θ_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment
Double Chooz Collaboration,Y. Abe,C. Aberle,J. C. dos Anjos,J. C. Barriere,M. Bergevin,A. Bernstein,T. J. C. Bezerra,L. Bezrukhov,E. Blucher,N. S. Bowden,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,P. Chimenti,T. Classen,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. Cucoanes,E. Damon,J. V. Dawson,S. Dazeley,D. Dietrich,Z. Djurcic,M. Dracos,V. Durand,J. Ebert,Y. Efremenko,M. Elnimr,A. Erickson,A. Etenko,M. Fallot,M. Fechner,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,A. J. Franke,M. Franke,H. Furuta,R. Gama,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,J. TM. Goon,D. Greiner,N. Haag,S. Habib,C. Hagner,T. Hara,F. X. Hartmann,J. Haser,A. Hatzikoutelis,T. Hayakawa,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,C. L. Jones,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,G. Keefer,E. Kemp,H. de Kerret,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,C. Langbrandtner,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Casta?o,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,D. McKee,J. Maeda,C. N. Maesano,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,M. Meyer,T. Miletic,R. Milincic,H. Miyata,Th. A. Mueller,Y. Nagasaka,K. Nakajima,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,I. Ostrovskiy,C. Palomares,I. M. Pepe,S. Perasso,P. Perrin,P. Pfahler,A. Porta,W. Potzel
Statistics , 2013, DOI: 10.1016/j.physletb.2013.04.050
Abstract: The Double Chooz experiment has determined the value of the neutrino oscillation parameter $\theta_{13}$ from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sample used in this analysis is distinct from that of the Gd analysis, and the systematic uncertainties are also largely independent, with some exceptions, such as the reactor neutrino flux prediction. A combined rate- and energy-dependent fit finds $\sin^2 2\theta_{13}=0.097\pm 0.034(stat.) \pm 0.034 (syst.)$, excluding the no-oscillation hypothesis at 2.0 \sigma. This result is consistent with previous measurements of $\sin^2 2\theta_{13}$.
Reactor electron antineutrino disappearance in the Double Chooz experiment
Y. Abe,C. Aberle,J. C. dos Anjos,J. C. Barriere,M. Bergevin,A. Bernstein,T. J. C. Bezerra,L. Bezrukhov,E. Blucher,N. S. Bowden,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,P. Chimenti,T. Classen,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. Cucoanes,M. V. D'Agostino,E. Damon,J. V. Dawson,S. Dazeley,D. Dietrich,Z. Djurcic,M. Dracos,V. Durand,J. Ebert,Y. Efremenko,M. Elnimr,A. Etenko,M. Fallot,M. Fechner,F. von Feilitzsch,J. Felde,D. Franco,A. J. Franke,M. Franke,H. Furuta,R. Gama,I. Gil-Botella,L. Giot,M. Goger-Neff,L. F. G. Gonzalez,M. C. Goodman,J. TM. Goon,D. Greiner,N. Haag,C. Hagner,T. Hara,F. X. Hartmann,J. Haser,A. Hatzikoutelis,T. Hayakawa,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,C. L. Jones,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,G. Keefer,E. Kemp,H. de Kerret,Y. Kibe,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,C. Langbrandtner,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castan?,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,D. McKee,J. Maeda,C. N. Maesano,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,H. Miyata,Th. A. Mueller,Y. Nagasaka,K. Nakajima,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,I. Ostrovskiy,C. Palomares,I. M. Pepe,S. Perasso,P. Perrin,P. Pfahler,A. Porta,W. Potzel,J. Reichenbacher,B. Reinhold,A. Remoto,M. Rohling,R. Roncin,S. Roth
Statistics , 2012, DOI: 10.1103/PhysRevD.86.052008
Abstract: The Double Chooz experiment has observed 8,249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power x detector mass x livetime) exposure using a 10.3 cubic meter fiducial volume detector located at 1050 m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of theta13 = 0 is 8,937 events. The deficit is interpreted as evidence of electron antineutrino disappearance. From a rate plus spectral shape analysis we find sin^2 2{\theta}13 = 0.109 \pm 0.030(stat) \pm 0.025(syst). The data exclude the no-oscillation hypothesis at 99.8% CL (2.9{\sigma}).
Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment
Y. Abe,C. Aberle,T. Akiri,J. C. dos Anjos,F. Ardellier,A. F. Barbosa,A. Baxter,M. Bergevin,A. Bernstein,T. J. C. Bezerra,L. Bezrukhov,E. Blucher,M. Bongrand,N. S. Bowden,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,P. Chimenti,T. Classen,A. P. Collin,E. Conover,J. M. Conrad,S. Cormon,J. I. Crespo-Anadón,M. Cribier,K. Crum,A. Cucoanes,M. V. D'Agostino,E. Damon,J. V. Dawson,S. Dazeley,M. Dierckxsens,D. Dietrich,Z. Djurcic,M. Dracos,V. Durand,Y. Efremenko,M. Elnimr,Y. Endo,A. Etenko,E. Falk,M. Fallot,M. Fechner,F. von Feilitzsch,J. Felde,S. M. Fernandes,D. Franco,A. J. Franke,M. Franke,H. Furuta,R. Gama,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,M. C. Goodman,J. TM. Goon,D. Greiner,B. Guillon,N. Haag,C. Hagner,T. Hara,F. X. Hartmann,J. Hartnell,T. Haruna,J. Haser,A. Hatzikoutelis,T. Hayakawa,M. Hofmann,G. A. Horton-Smith,M. Ishitsuka,J. Jochum,C. Jollet,C. L. Jones,F. Kaether,L. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,G. Keefer,E. Kemp,H. de Kerret,Y. Kibe,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,C. Langbrandtner,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,Y. Liu,J. M. López-Castan?,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,D. McKee,J. Maeda,C. N. Maesano,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,A. Milzstajn,H. Miyata,D. Motta,Th. A. Mueller,Y. Nagasaka,K. Nakajima,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,I. Ostrovskiy
Statistics , 2011, DOI: 10.1103/PhysRevLett.108.131801
Abstract: The Double Chooz Experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. A ratio of 0.944 $\pm$ 0.016 (stat) $\pm$ 0.040 (syst) observed to predicted events was obtained in 101 days of running at the Chooz Nuclear Power Plant in France, with two 4.25 GW$_{th}$ reactors. The results were obtained from a single 10 m$^3$ fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 measurement as an anchor point. The deficit can be interpreted as an indication of a non-zero value of the still unmeasured neutrino mixing parameter \sang. Analyzing both the rate of the prompt positrons and their energy spectrum we find \sang = 0.086 $\pm$ 0.041 (stat) $\pm$ 0.030 (syst), or, at 90% CL, 0.015 $<$ \sang $\ <$ 0.16.
Precision Muon Reconstruction in Double Chooz
Double Chooz collaboration,Y. Abe,J. C. dos Anjos,J. C. Barriere,E. Baussan,I. Bekman,M. Bergevin,T. J. C. Bezerra,L. Bezrukov,E. Blucher,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,E. Chauveau,P. Chimenti,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. Cucoanes,E. Damon,J. V. Dawson,D. Dietrich,Z. Djurcic,M. Dracos,M. Elnimr,A. Etenko,M. Fallot,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,M. Franke,H. Furuta,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,C. Grant,N. Haag,T. Hara,J. Haser,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,E. Kemp,H. de Kerret,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Casta no,J. M. LoSecco,B. Lubsandorzhiev,S. Lucht,J. Maeda,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,A. Minotti,Y. Nagasaka,Y. Nikitenko,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,C. Palomares,I. M. Pepe,S. Perasso,P. Pfahler,A. Porta,G. Pronost,J. Reichenbacher,B. Reinhold,M. R?hling,R. Roncin,S. Roth,B. Rybolt,Y. Sakamoto,R. Santorelli,A. C. Schilithz,S. Sch?nert,S. Schoppmann,M. H. Shaevitz,R. Sharankova,S. Shimojima,V. Sibille,V. Sinev,M. Skorokhvatov,E. Smith,J. Spitz,A. Stahl,I. Stancu,L. F. F. Stokes,M. Strait,A. Stüken,F. Suekane
Physics , 2014, DOI: 10.1016/j.nima.2014.07.058
Abstract: We describe a muon track reconstruction algorithm for the reactor anti-neutrino experiment Double Chooz. The Double Chooz detector consists of two optically isolated volumes of liquid scintillator viewed by PMTs, and an Outer Veto above these made of crossed scintillator strips. Muons are reconstructed by their Outer Veto hit positions along with timing information from the other two detector volumes. All muons are fit under the hypothesis that they are through-going and ultrarelativistic. If the energy depositions suggest that the muon may have stopped, the reconstruction fits also for this hypothesis and chooses between the two via the relative goodness-of-fit. In the ideal case of a through-going muon intersecting the center of the detector, the resolution is ~40 mm in each transverse dimension. High quality muon reconstruction is an important tool for reducing the impact of the cosmogenic isotope background in Double Chooz.
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