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Search Results: 1 - 10 of 50519 matches for " Y. Declais "
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Neutrino-induced deuteron disintegration experiment
S. P. Riley,Z. D. Greenwood,W. R. Kropp,L. R. Price,F. Reines,H. W. Sobel,Y. Declais,A. Etinko,M. Skorokhvatov
Physics , 1999, DOI: 10.1103/PhysRevC.59.1780
Abstract: Cross sections for the disintegration of the deuteron via neutral-current (NCD) and charged-current (CCD) interactions with reactor antineutrinos are measured to be 6.08 +/- 0.77 x 10^(-45) cm-sq and 9.83 +/- 2.04 x 10^(-45) cm-sq per neutrino, respectively, in excellent agreement with current calculations. Since the experimental NCD value depends upon the CCD value, if we use the theoretical value for the CCD reaction, we obtain the improved value of 5.98 +/- 0.54 x 10^(-45) for the NCD cross section. The neutral-current reaction allows a unique measurement of the isovector-axial vector coupling constant in the hadronic weak interaction (beta). In the standard model, this constant is predicted to be exactly 1, independent of the Weinberg angle. We measure a value of beta^2 = 1.01 +/- 0.16. Using the above improved value for the NCD cross section, beta^2 becomes 0.99 +/- 0.10.
Search for neutrino oscillations on a long base-line at the CHOOZ nuclear power station
M. Apollonio,A. Baldini,C. Bemporad,E. Caffau,F. Cei,Y. Declais,H. de Kerret,B. Dieterle,A. Etenko,L. Foresti,J. George,G. Giannini,M. Grassi,Y. Kozlov,W. Kropp,D. Kryn,M. Laiman,C. E. Lane,B. Lefievre,I. Machulin,A. Martemyanov,V. Martemyanov,L. Mikaelyan,D. Nicolo,M. Obolensky,R. Pazzi,G. Pieri,L. Price,S. Riley,R. Reeder,A. Sabelnikov,G. Santin,M. Skorokhvatov,H. Sobel,J. Steele,R. Steinberg,S. Sukhotin,S. Tomshaw,D. Veron,V. Vyrodov
Physics , 2003, DOI: 10.1140/epjc/s2002-01127-9
Abstract: This final article about the CHOOZ experiment presents a complete description of the electron antineutrino source and detector, the calibration methods and stability checks, the event reconstruction procedures and the Monte Carlo simulation. The data analysis, systematic effects and the methods used to reach our conclusions are fully discussed. Some new remarks are presented on the deduction of the confidence limits and on the correct treatment of systematic errors.
Limits on Neutrino Oscillations from the CHOOZ Experiment
M. Apollonio,A. Baldini,C. Bemporad,E. Caffau,F. Cei,Y. Declais,H. de Kerret,B. Dieterle,A. Etenko,L. Foresti,J. George,G. Giannini,M. Grassi,Y. Kozlov,W. Kropp,D. Kryn,M. Laiman,C. E. Lane,B. Lefievre,I. Machulin,A. Martemyanov,V. Martemyanov,L. Mikaelyan,D. Nicolo,M. Obolensky,R. Pazzi,G. Pieri,L. Price,S. Riley,R. Reeder,A. Sabelnikov,G. Santin,M. Skorokhvatov,H. Sobel,J. Steele,R. Steinberg,S. Sukhotin,S. Tomshaw,D. Veron,V. Vyrodov
Physics , 1999, DOI: 10.1016/S0370-2693(99)01072-2
Abstract: We present new results based on the entire CHOOZ data sample. We find (at 90% confidence level) no evidence for neutrino oscillations in the anti_nue disappearance mode, for the parameter region given by approximately Delta m**2 > 7 x 10**-4 eV^2 for maximum mixing, and sin**2(2 theta) = 0.10 for large Delta m**2. Lower sensitivity results, based only on the comparison of the positron spectra from the two different-distance nuclear reactors, are also presented; these are independent of the absolute normalization of the anti_nue flux, the cross section, the number of target protons and the detector efficiencies.
Determination of neutrino incoming direction in the CHOOZ experiment and Supernova explosion location by scintillator detectors
M. Apollonio,A. Baldini,C. Bemporad,E. Caffau,F. Cei,Y. Declais,H. de Kerret,B. Dieterle,A. Etenko,L. Foresti,J. George,G. Giannini,M. Grassi,Y. Kozlov,W. Kropp,D. Kryn,M. Laiman,C. E. Lane,B. Lefievre,I. Machulin,A. Martemyanov,V. Martemyanov,L. Mikaelyan,D. Nicolo,M. Obolensky,R. Pazzi,G. Pieri,L. Price,S. Riley,R. Reeder,A. Sabelnikov,G. Santin,M. Skorokhvatov,H. Sobel,J. Steele,R. Steinberg,S. Sukhotin,S. Tomshaw,D. Veron,V. Vyrodov
Physics , 1999, DOI: 10.1103/PhysRevD.61.012001
Abstract: The CHOOZ experiment measured the antineutrino flux at a distance of about 1 Km from two nuclear reactors in order to detect possible neutrino oscillations with squared mass differences as low as 10**-3 eV**2 for full mixing. We show that the data analysis of the electron antineutrino events, collected by our liquid scintillation detector, locates the antineutrino source within a cone of half-aperture of about 18 degrees at the 68% C.L.. We discuss the implications of this experimental result for tracking down a supernova explosion.
Search for spontaneous muon emission from lead nuclei
L. Arrabito,D. Autiero,E. Barbuto,C. Bozza,S. Cecchini,L. Consiglio,M. Cozzi,N. D'Ambrosio,Y. Declais,G. De Lellis,G. De Rosa,M. De Serio,D. Di Ferdinando,A. Di Giovanni,N. Di Marco,L. S. Esposito,G. Giacomelli,M. Giorgini,G. Grella,M. Hauger,M. Ieva,D. B. Ion,I. Janicsko,F. Juget,I. Laktineh,G. Mandrioli,S. Manzoor,A. Margiotta,P. Migliozzi,P. Monacelli,M. T. Muciaccia,L. Patrizii,C. Pistillo,V. Popa,G. Romano,G. Rosa,P. Royole-Degieux,S. Simone,M. Sioli,C. Sirignano,G. Sirri,G. Sorrentino,M. Spurio,V. Tioukov
Physics , 2005,
Abstract: We describe a possible search for muonic radioactivity from lead nuclei using the base elements ("bricks" composed by lead and nuclear emulsion sheets) of the long-baseline OPERA neutrino experiment. We present the results of a Monte Carlo simulation concerning the expected event topologies and estimates of the background events. Using few bricks, we could reach a good sensitivity level.
Large underground, liquid based detectors for astro-particle physics in Europe: scientific case and prospects
Autiero, D.;Aysto, J.;Badertscher, A.;Bezrukov, L.;Bouchez, J.;Bueno, A.;Busto, J.;Campagne, J. -E.;Cavata, Ch.;Chaussard, L.;de Bellefon, A.;Declais, Y.;Dumarchez, J.;Ebert, J.;Enqvist, T.;Ereditato, A.;von Feilitzsch, F.;Perez, P. Fileviez;Goger-Neff, M.;Gninenko, S.;Gruber, W.;Hagner, C.;Hess, M.;Hochmuth, K. A.;Kisiel, J.;Knecht, L.;Kreslo, I.;Kudryavtsev, V. A.;Kuusiniemi, P.;Lachenmaier, T.;Laffranchi, M.;Lefievre, B.;Lightfoot, P. K.;Lindner, M.;Maalampi, J.;Maltoni, M.;Marchionni, A.;Undagoitia, T. Marrodan;Marteau, J.;Meregaglia, A.;Messina, M.;Mezzetto, M.;Mirizzi, A.;Mosca, L.;Moser, U.;Muller, A.;Natterer, G.;Oberauer, L.;Otiougova, P.;Patzak, T.;Peltoniemi, J.;Potzel, W.;Pistillo, C .;Raffelt, G. G.;Rondio, E.;Roos, M.;Rossi, B.;Rubbia, A.;Savvinov, N.;Schwetz, T.;Sobczyk, J.;Spooner, N. J. C.;Stefan, D.;Tonazzo, A.;Trzaska, W.;Ulbricht, J.;Volpe, C.;Winter, J.;Wurm, M.;Zalewska, A.;Zimmermann, R.
High Energy Physics - Phenomenology , 2007, DOI: 10.1088/1475-7516/2007/11/011
Abstract: This document reports on a series of experimental and theoretical studies conducted to assess the astro-particle physics potential of three future large-scale particle detectors proposed in Europe as next generation underground observatories. The proposed apparatus employ three different and, to some extent, complementary detection techniques: GLACIER (liquid Argon TPC), LENA (liquid scintillator) and MEMPHYS (\WC), based on the use of large mass of liquids as active detection media. The results of these studies are presented along with a critical discussion of the performance attainable by the three proposed approaches coupled to existing or planned underground laboratories, in relation to open and outstanding physics issues such as the search for matter instability, the detection of astrophysical- and geo-neutrinos and to the possible use of these detectors in future high-intensity neutrino beams.
A New Paradigm for Metallic Alloys in Materials Science  [PDF]
Y. Ustinovshikov
Advances in Materials Physics and Chemistry (AMPC) , 2015, DOI: 10.4236/ampc.2015.57025
Abstract: In the article, taking into account the phase transition “ordering-phase separation” discovered in alloys, new concepts about the diffusion phase transformations in alloys are formulated: chemical interaction between dissimilar atoms exists always in all alloys and at any temperature of heating; alloys offer a surprising and not previously known property of changing the sign of the chemical interaction between dissimilar atoms at a change of the temperature or composition of alloys; diffusion processes occurring in alloys at different temperatures depend on the sign and the absolute magnitude of the energy of the chemical interaction between dissimilar atoms. All these three concepts are analyzed in detail, by the example of Ni-based and Co-based binary alloys using experimental results obtained by transmission electron microscopy. It is shown, on these ideas, how to carry out heat treatment of alloys more rationally, what principles should underpinned in the base of the construction of phase diagrams, how the microstructures of ordering and phase separation affect some properties of alloys.
Measurement of the neutrino velocity with the OPERA detector in the CNGS beam
The OPERA Collaboration,T. Adam,N. Agafonova,A. Aleksandrov,O. Altinok,P. Alvarez Sanchez,A. Anokhina,S. Aoki,A. Ariga,T. Ariga,D. Autiero,A. Badertscher,A. Ben Dhahbi,A. Bertolin,C. Bozza,T. Brugiere,R. Brugnera,F. Brunet,G. Brunetti,S. Buontempo,B. Carlus,F. Cavanna,A. Cazes,L. Chaussard,M. Chernyavsky,V. Chiarella,A. Chukanov,G. Colosimo,M. Crespi,N. D'Ambrosio,G. De Lellis,M. De Serio,Y. Declais,P. del Amo Sanchez,F. Di Capua,A. Di Crescenzo,D. Di Ferdinando,N. Di Marco,S. Dmitrievsky,M. Dracos,D. Duchesneau,S. Dusini,T. Dzhatdoev,J. Ebert,I. Efthymiopoulos,O. Egorov,A. Ereditato,L. S. Esposito,J. Favier,T. Ferber,R. A. Fini,T. Fukuda,A. Garfagnini,G. Giacomelli,M. Giorgini,M. Giovannozzi,C. Girerd,J. Goldberg,C. Gollnitz,D. Golubkov,L. Goncharova,Y. Gornushkin,G. Grella,F. Grianti,E. Gschwendtner,C. Guerin,A. M. Guler,C. Gustavino,C. Hagner,K. Hamada,T. Hara,R. Enikeev,M. Hierholzer,A. Hollnagel,M. Ieva,H. Ishida,K. Ishiguro,K. Jakovcic,C. Jollet,M. Jones,F. Juget,M. Kamiscioglu,J. Kawada,S. H. Kim,M. Kimura,E. Kiritsis,N. Kitagawa,B. Klicek,J. Knuesel,K. Kodama,M. Komatsu,U. Kose,I. Kreslo,C. Lazzaro,J. Lenkeit,A. Ljubicic,A. Longhin,A. Malgin,G. Mandrioli,J. Marteau,T. Matsuo,V. Matveev,N. Mauri,A. Mazzoni,E. Medinaceli,F. Meisel,A. Meregaglia,P. Migliozzi,S. Mikado,D. Missiaen,P. Monacelli,K. Morishima,U. Moser,M. T. Muciaccia,N. Naganawa,T. Naka,M. Nakamura,T. Nakano,Y. Nakatsuka,D. Naumov,V. Nikitina,F. Nitti,S. Ogawa,N. Okateva,A. Olchevsky,O. Palamara,A. Paoloni
Statistics , 2011, DOI: 10.1007/JHEP10(2012)093
Abstract: The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 km. The measurement is based on data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the CNGS timing system and of the OPERA detector, as well as a high precision geodesy campaign for the measurement of the neutrino baseline, allowed reaching comparable systematic and statistical accuracies. An arrival time of CNGS muon neutrinos with respect to the one computed assuming the speed of light in vacuum of (6.5 +/- 7.4(stat.)((+8.3)(-8.0)sys.))ns was measured corresponding to a relative difference of the muon neutrino velocity with respect to the speed of light (v-c)/c =(2.7 +/-3.1(stat.)((+3.4)(-3.3)(sys.))x10^(-6). The above result, obtained by comparing the time distributions of neutrino interactions and of protons hitting the CNGS target in 10.5 microseconds long extractions, was confirmed by a test performed at the end of 2011 using a short bunch beam allowing to measure the neutrino time of flight at the single interaction level.
The LAGUNA design study- towards giant liquid based underground detectors for neutrino physics and astrophysics and proton decay searches
LAGUNA Collaboration,D. Angus,A. Ariga,D. Autiero,A. Apostu,A. Badertscher,T. Bennet,G. Bertola,P. F. Bertola,O. Besida,A. Bettini,C. Booth,J. L. Borne,I. Brancus,W. Bujakowsky,J. E. Campagne,G. Cata Danil,F. Chipesiu,M. Chorowski,J. Cripps,A. Curioni,S. Davidson,Y. Declais,U. Drost,O. Duliu,J. Dumarchez,T. Enqvist,A. Ereditato,F. von Feilitzsch,H. Fynbo,T. Gamble,G. Galvanin,A. Gendotti,W. Gizicki,M. Goger-Neff,U. Grasslin,D. Gurney,M. Hakala,S. Hannestad,M. Haworth,S. Horikawa,A. Jipa,F. Juget,T. Kalliokoski,S. Katsanevas,M. Keen,J. Kisiel,I. Kreslo,V. Kudryastev,P. Kuusiniemi,L. Labarga,T. Lachenmaier,J. C. Lanfranchi,I. Lazanu,T. Lewke,K. Loo,P. Lightfoot,M. Lindner,A. Longhin,J. Maalampi,M. Marafini,A. Marchionni,R. M. Margineanu,A. Markiewicz,T. Marrodan-Undagoita,J. E. Marteau,R. Matikainen,Q. Meindl,M. Messina,J. W. Mietelski,B. Mitrica,A. Mordasini,L. Mosca,U. Moser,G. Nuijten,L. Oberauer,A. Oprina,S. Paling,S. Pascoli,T. Patzak,M. Pectu,Z. Pilecki,F. Piquemal,W. Potzel,W. Pytel,M. Raczynski,G. Rafflet,G. Ristaino,M. Robinson,R. Rogers,J. Roinisto,M. Romana,E. Rondio,B. Rossi,A. Rubbia,Z. Sadecki,C. Saenz,A. Saftoiu,J. Salmelainen,O. Sima,J. Slizowski,K. Slizowski,J. Sobczyk,N. Spooner,S. Stoica,J. Suhonen,R. Sulej,M. Szarska,T. Szeglowski,M. Temussi,J. Thompson,L. Thompson,W. H. Trzaska,M. Tippmann,A. Tonazzo,K. Urbanczyk,G. Vasseur,A. Williams,J. Winter,K. Wojutszewska,M. Wurm,A. Zalewska,M. Zampaolo,M. Zito
Physics , 2009,
Abstract: The feasibility of a next generation neutrino observatory in Europe is being considered within the LAGUNA design study. To accommodate giant neutrino detectors and shield them from cosmic rays, a new very large underground infrastructure is required. Seven potential candidate sites in different parts of Europe and at several distances from CERN are being studied: Boulby (UK), Canfranc (Spain), Fr\'ejus (France/Italy), Pyh\"asalmi (Finland), Polkowice-Sieroszowice (Poland), Slanic (Romania) and Umbria (Italy). The design study aims at the comprehensive and coordinated technical assessment of each site, at a coherent cost estimation, and at a prioritization of the sites within the summer 2010.
Quasi-Square Wave Mode Phase-Shifted PWM LCC Resonant Converter for Regulated Power Supply  [PDF]
Engineering (ENG) , 2009, DOI: 10.4236/eng.2009.13024
Abstract: This paper presents an improved self sustained oscillating controller circuit using LCC components for improving the overall efficiency of the system. It has a micro controller based active controller, which controls the performance from no-load up to full-load. The steady state characteristics are developed and a design example is given in detail. The proposed controller allows zero current switching at any loading condition which results in a reasonable reduction of power loss during switching with a promising efficiency. Analytical and experimental results verify the achievement the design specifications.
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