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Qualification Tests of 474 Photomultiplier Tubes for the Inner Detector of the Double Chooz Experiment

Sep 21, 2013 09/13

by C. Bauer; E. Borger; R. Hofacker; K. Jänner; F. Kaether; C. Langbrandtner; M. Lindner; S. Lucht; M. Reissfelder; S. Schönert; A. Stüken; C. Wiebusch

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The hemispherical 10" photomultiplier tube (PMT) R7081 from Hamamatsu Photonics K.K. (HPK) is used in various experiments in particle and astroparticle physics. We describe the test and calibration of 474 PMTs for the reactor antineutrino experiment Double Chooz. The unique test setup at Max-Planck-Institut f\"ur Kernphysik Heidelberg (MPIK) allows one to calibrate 30 PMTs simultaneously and to characterize the single photo electron response, transit time spread, linear behaviour and...
Source: http://arxiv.org/abs/1104.0758v2

Arxiv.org

38 38

The Trigger and Timing System of the Double Chooz Experiment

Sep 18, 2013 09/13

by F. Beissel; A. Cabrera; A. Cucuanes; J. V. Dawson; D. Kryn; C. Kuhnt; S. Lucht; B. Reinhold; M. Rosenthal; S. Roth; A. Stahl; A. Stüken; C. Wiebusch

eye 38

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Modern precision neutrino experiments like Double Chooz require a highly efficient trigger system in order to reduce systematic uncertainties. The trigger and timing system of the Double Chooz experiment was designed according to this goal. The Double Chooz trigger system is driven by the basic idea of triggering on multiple thresholds according to the total visible energy and additionally triggering on the number of active photomultiplier tubes (PMTs) in the detector. To do so, the trigger...
Source: http://arxiv.org/abs/1209.5607v2

Arxiv.org

8 8.0

$Improved measurements of the neutrino mixing angle $\theta_{13}$ with the Double Chooz detector$

Improved measurements of the neutrino mixing angle $\theta_{13}$ with the Double Chooz detector

Jun 30, 2018 06/18

by 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; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schönert; A. Cabrera; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; E. Caden; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stüken; F....

eye 8

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The Double Chooz experiment presents improved measurements of the neutrino mixing angle $\theta_{13}$ using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect to previous publications, whereas the efficiency of the $\bar\nu_{e}$ signal has increased. The...
Topics: Instrumentation and Detectors, Physics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1406.7763

Arxiv.org

7 7.0

Ortho-positronium observation in the Double Chooz Experiment

Jun 30, 2018 06/18

by 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; J. Reichenbacher; B. Reinhold; M. Rohling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schonert; A. Cabrera; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; E. Caden; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stuken; F. Suekane;...

eye 7

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The Double Chooz experiment measures the neutrino mixing angle $\theta_{13}$ by detecting reactor $\bar{\nu}_e$ via inverse beta decay. The positron-neutron space and time coincidence allows for a sizable background rejection, nonetheless liquid scintillator detectors would profit from a positron/electron discrimination, if feasible in large detector, to suppress the remaining background. Standard particle identification, based on particle dependent time profile of photon emission in liquid...
Topics: Physics, High Energy Physics - Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1407.6913

Arxiv.org

7 7.0

Precision Muon Reconstruction in Double Chooz

Jun 30, 2018 06/18

by 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. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schönert; J. Busenitz; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; A. Stahl; A. Cabrera; I. Stancu; L. F. F. Stokes; M. Strait; A. Stüken; F....

eye 7

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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...
Topics: Physics, High Energy Physics - Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1405.6227

Arxiv.org

8 8.0

Muon capture on light isotopes in Double Chooz

Jun 28, 2018 06/18

by Double Chooz collaboration; Y. Abe; T. Abrahão; H. Almazan; C. Alt; S. Appel; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; S. Perasso; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; B. Rybolt; Y. Sakamoto; R. Santorelli; L. Bezrukov; A. C. Schilithz; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; E. Blucher; M. Soiron; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes;...

eye 8

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Using the Double Chooz detector, designed to measure the neutrino mixing angle $\theta_{13}$, the products of $\mu^-$ capture on $^{12}$C, $^{13}$C, $^{14}$N and $^{16}$O have been measured. Over a period of 489.5 days, $2.3\times10^6$ stopping cosmic $\mu^-$ have been collected, of which $1.8\times10^5$ captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the...
Topics: High Energy Physics - Experiment, Instrumentation and Detectors, Nuclear Experiment, Physics
Source: http://arxiv.org/abs/1512.07562

Arxiv.org

6 6.0

Characterization of the Spontaneous Light Emission of the PMTs used in the Double Chooz Experiment

Jun 29, 2018 06/18

by Double Chooz collaboration; Y. Abe; T. Abrahão; H. Almazan; C. Alt; S. Appel; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; L. Bezrukov; C. Palomares; I. M. Pepe; S. Perasso; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; B. Rybolt; E. Blucher; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; D. Shrestha; V. Sibille; V. Sinev; T. Brugière; M. Skorokhvatov; E. Smith; M. Soiron; J. Spitz; A. Stahl; I....

eye 6

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During the commissioning of the first of the two detectors of the Double Chooz experiment, an unexpected and dominant background caused by the emission of light inside the optical volume has been observed. A specific study of the ensemble of phenomena called "Light Noise" has been carried out in-situ, and in an external laboratory, in order to characterize the signals and to identify the possible processes underlying the effect. Some mechanisms of instrumental noise originating from...
Topics: High Energy Physics - Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1604.06895

Arxiv.org

5 5.0

$Background-independent measurement of $\theta_{13}$ in Double Chooz$

Background-independent measurement of $\theta_{13}$ in Double Chooz

Jun 30, 2018 06/18

by 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; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; F. Sato; A. Cabrera; A. C. Schilithz; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; E. Caden; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stüken;...

eye 5

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The oscillation results published by the Double Chooz collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle $\theta_{13}$ by including 7.53 days of reactor-off data. A global fit of the observed neutrino rates for different reactor power conditions is performed, yielding a measurement of both $\theta_{13}$ and the total background rate. The results on the mixing angle...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1401.5981

Arxiv.org

5 5.0

$Measurement of $\theta_{13}$ in Double Chooz using neutron captures on hydrogen with novel background rejection techniques$

Measurement of $\theta_{13}$ in Double Chooz using neutron captures on hydrogen with novel background rejection techniques

Jun 28, 2018 06/18

by Y. Abe; S. Appel; T. Abrahão; H. Almazan; C. Alt; J. C. dos Anjos; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; L. Bezrukov; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; M. Soiron; E. Blucher; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; F. Suekane;...

eye 5

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The Double Chooz collaboration presents a measurement of the neutrino mixing angle $\theta_{13}$ using reactor $\overline{\nu}_{e}$ observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050m from two reactor cores. Several novel techniques have been developed to achieve...
Topics: High Energy Physics - Experiment, Instrumentation and Detectors, Physics
Source: http://arxiv.org/abs/1510.08937

Arxiv.org

120 120

Reactor electron antineutrino disappearance in the Double Chooz experiment

Sep 20, 2013 09/13

by 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....

eye 120

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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...
Source: http://arxiv.org/abs/1207.6632v4

Arxiv.org

58 58

First Measurement of θ_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment

Sep 21, 2013 09/13

by 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;...

eye 58

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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...
Source: http://arxiv.org/abs/1301.2948v2

Arxiv.org

57 57

First Test of Lorentz Violation with a Reactor-based Antineutrino Experiment

Sep 18, 2013 09/13

by Double Chooz Collaboration; Y. Abe; C. Aberle; J. C. dos Anjos; 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. Erickson;...

eye 57

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We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring a search for a sidereal time dependence of the events, is the first test of Lorentz invariance using a reactor-based antineutrino source. No sidereal variation is present in the data and the disappearance results are consistent with sidereal time independent oscillations. Under the Standard-Model Extension (SME),...
Source: http://arxiv.org/abs/1209.5810v2

Arxiv.org

66 66

Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz

Sep 22, 2013 09/13

by 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;...

eye 66

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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...
Source: http://arxiv.org/abs/1210.3748v2

Arxiv.org

61 61

Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment

Sep 24, 2013 09/13

by 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....

eye 61

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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...
Source: http://arxiv.org/abs/1112.6353v3

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