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114 114

Status of the LUX Dark Matter Search

Sep 17, 2013 09/13

by S. Fiorucci; D. S. Akerib; S. Bedikian; A. Bernstein; A. Bolozdynya; A. Bradley; D. Carr; J. Chapman; K. Clark; T. Classen; A. Curioni; E. Dahl; S. Dazeley; L. de Viveiros; E. Druszkiewicz; R. Gaitskell; C. Hall; C. Hernandez Faham; B. Holbrook; L. Kastens; K. Kazkaz; R. Lander; K. Lesko; D. Malling; R. Mannino; D. McKinsey; D. Mei; J. Mock; J. Nikkel; P. Phelps; U. Schroeder; T. Shutt; W. Skulski; P. Sorensen; J. Spaans; T. Stiegler; R. Svoboda; M. Sweany; J. Thomson; J. Toke; M. Tripathi; N....

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The Large Underground Xenon (LUX) dark matter search experiment is currently being deployed at the Homestake Laboratory in South Dakota. We will highlight the main elements of design which make the experiment a very strong competitor in the field of direct detection, as well as an easily scalable concept. We will also present its potential reach for supersymmetric dark matter detection, within various timeframes ranging from 1 year to 5 years or more.
Source: http://arxiv.org/abs/0912.0482v1

Arxiv.org

50 50

The LUX Prototype Detector: Heat Exchanger Development

Sep 20, 2013 09/13

by D. S. Akerib; X. Bai; S. Bedikian; A. Bernstein; A. Bolozdynya; A. Bradley; S. Cahn; D. Carr; J. J. Chapman; K. Clark; T. Classen; A. Curioni; C. E. Dahl; S. Dazeley; L. deViveiros; M. Dragowsky; E. Druszkiewicz; S. Fiorucci; R. J. Gaitskell; C. Hall; C. Faham; B. Holbrook; L. Kastens; K. Kazkaz; J. Kwong; R. Lander; D. Leonard; D. Malling; R. Mannino; D. N. McKinsey; D. Mei; J. Mock; M. Morii; J. Nikkel; P. Phelps; T. Shutt; W. Skulski; P. Sorensen; J. Spaans; T. Steigler; R. Svoboda; M....

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The LUX (Large Underground Xenon) detector is a two-phase xenon Time Projection Chamber (TPC) designed to search for WIMP-nucleon dark matter interactions. As with all noble element detectors, continuous purification of the detector medium is essential to produce a large ($>$1ms) electron lifetime; this is necessary for efficient measurement of the electron signal which in turn is essential for achieving robust discrimination of signal from background events. In this paper we describe the...
Source: http://arxiv.org/abs/1207.3665v2

Arxiv.org

63 63

Data Acquisition and Readout System for the LUX Dark Matter Experiment

Sep 21, 2013 09/13

by D. S. Akerib; X. Bai; S. Bedikian; E. Bernard; A. Bernstein; A. Bradley; S. B. Cahn; M. C. Carmona-Benitez; D. Carr; J. J. Chapman; K. Clark; T. Classen; T. Coffey; A. Curioni; S. Dazeley; L. deViveiros; M. Dragowsky; E. Druszkiewicz; C. H. Faham; S. Fiorucci; R. J. Gaitskell; K. R. Gibson; C. Hall; M. Hanhardt; B. Holbrook; M. Ihm; R. G. Jacobsen; L. Kastens; K. Kazkaz; R. Lander; N. Larsen; C. Lee; D. Leonard; K. Lesko; A. Lyashenko; D. C. Malling; R. Mannino; D. N. McKinsey; D. Mei; J. Mock;...

eye 63

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LUX is a two-phase (liquid/gas) xenon time projection chamber designed to detect nuclear recoils from interactions with dark matter particles. Signals from the LUX detector are processed by custom-built analog electronics which provide properly shaped signals for the trigger and data acquisition (DAQ) systems. The DAQ is comprised of commercial digitizers with firmware customized for the LUX experiment. Data acquisition systems in rare-event searches must accommodate high rate and large dynamic...
Source: http://arxiv.org/abs/1108.1836v2

Arxiv.org

147 147

LUXSim: A Component-Centric Approach to Low-Background Simulations

Sep 23, 2013 09/13

by D. S. Akerib; X. Bai; S. Bedikian; E. Bernard; A. Bernstein; A. Bradley; S. B. Cahn; M. C. Carmona-Benitez; D. Carr; J. J. Chapman; K. Clark; T. Classen; T. Coffey; S. Dazeley; L. de Viveiros; M. Dragowsky; E. Druszkiewicz; C. H. Faham; S. Fiorucci; R. J. Gaitskell; K. R. Gibson; C. Hall; M. Hanhardt; B. Holbrook; M. Ihm; R. G. Jacobsen; L. Kastens; K. Kazkaz; R. Lander; N. Larsen; C. Lee; D. Leonard; K. Lesko; A. Lyashenko; D. C. Malling; R. Mannino; D. N. McKinsey; D. -M Mei; J. Mock; M....

eye 147

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Geant4 has been used throughout the nuclear and high-energy physics community to simulate energy depositions in various detectors and materials. These simulations have mostly been run with a source beam outside the detector. In the case of low-background physics, however, a primary concern is the effect on the detector from radioactivity inherent in the detector parts themselves. From this standpoint, there is no single source or beam, but rather a collection of sources with potentially...
Source: http://arxiv.org/abs/1111.2074v1

Arxiv.org

75 75

Radio-assay of Titanium samples for the LUX Experiment

Sep 24, 2013 09/13

by D. S. Akerib; X. Bai; S. Bedikian; E. Bernard; A. Bernstein; A. Bradley; S. B. Cahn; M. C. Carmona-Benitez; D. Carr; J. J. Chapman; Y-D. Chan; K. Clark; T. Classen; T. Coffey; S. Dazeley; L. deViveiros; M. Dragowsky; E. Druszkiewicz; C. H. Faham; S. Fiorucci; R. J. Gaitskell; K. R. Gibson; C. Hall; M. Hanhardt; B. Holbrook; M. Ihm; R. G. Jacobsen; L. Kastens; K. Kazkaz; R. Lander; N. Larsen; C. Lee; D. Leonard; K. Lesko; A. Lyashenko; D. C. Malling; R. Mannino; D. McKinsey; D. Mei; J. Mock; M....

eye 75

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We report on the screening of samples of titanium metal for their radio-purity. The screening process described in this work led to the selection of materials used in the construction of the cryostats for the Large Underground Xenon (LUX) dark matter experiment. Our measurements establish titanium as a highly desirable material for low background experiments searching for rare events. The sample with the lowest total long-lived activity was measured to contain
Source: http://arxiv.org/abs/1112.1376v3

Arxiv.org

30 30

Background Radiation Measurements at High Power Research Reactors

Jun 27, 2018 06/18

by J. Ashenfelter; B. Balantekin; C. X. Baldenegro; H. R. Band; G. Barclay; C. D. Bass; D. Berish; N. S. Bowden; C. D. Bryan; J. J. Cherwinka; R. Chu; T. Classen; D. Davee; D. Dean; G. Deichert; M. J. Dolinski; J. Dolph; D. A. Dwyer; S. Fan; J. K. Gaison; A. Galindo-Uribarri; K. Gilje; A. Glenn; M. Green; K. Han; S. Hans; K. M. Heeger; B. Heffron; D. E. Jaffe; S. Kettell; T. J. Langford; B. R. Littlejohn; D. Martinez; R. D. McKeown; S. Morrell; P. E. Mueller; H. P. Mumm; J. Napolitano; D. Norcini;...

eye 30

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Research reactors host a wide range of activities that make use of the intense neutron fluxes generated at these facilities. Recent interest in performing measurements with relatively low event rates, e.g. reactor antineutrino detection, at these facilities necessitates a detailed understanding of background radiation fields. Both reactor-correlated and naturally occurring background sources are potentially important, even at levels well below those of importance for typical activities. Here we...
Topics: Instrumentation and Detectors, Physics, Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1506.03547

Arxiv.org

16 16

Light Collection and Pulse-Shape Discrimination in Elongated Scintillator Cells for the PROSPECT Reactor Antineutrino Experiment

Jun 28, 2018 06/18

by J. Ashenfelter; B. Balantekin; H. R. Band; G. Barclay; C. D. Bass; D. Berish; N. S. Bowden; A. Bowes; J. P. Brodsky; C. D. Bryan; J. J. Cherwinka; R. Chu; T. Classen; K. Commeford; D. Davee; D. Dean; G. Deichert; M. V. Diwan; M. J. Dolinski; J. Dolph; D. A. Dwyer; J. K. Gaison; A. Galindo-Uribarri; K. Gilje; A. Glenn; B. W. Goddard; M. Green; K. Han; S. Hans; K. M. Heeger; B. Heffron; D. E. Jaffe; T. J. Langford; B. R. Littlejohn; D. A. Martinez Caicedo; R. D. McKeown; M. P. Mendenhall; P....

eye 16

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A meter-long, 23-liter EJ-309 liquid scintillator detector has been constructed to study the light collection and pulse-shape discrimination performance of elongated scintillator cells for the PROSPECT reactor antineutrino experiment. The magnitude and uniformity of light collection and neutron/gamma discrimination power in the energy range of antineutrino inverse beta decay products have been studied using gamma and spontaneous fission calibration sources deployed along the cell long axis. We...
Topics: Instrumentation and Detectors, Physics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1508.06575

Arxiv.org

9 9.0

The PROSPECT Physics Program

Jun 28, 2018 06/18

by J. Ashenfelter; B. Balantekin; H. R. Band; G. Barclay; C. D. Bass; D. Berish; N. S. Bowden; A. Bowes; C. D. Bryan; J. P. Brodsky; J. J. Cherwinka; R. Chu; T. Classen; K. Commeford; D. Davee; D. Dean; G. Deichert; M. V. Diwan; M. J. Dolinski; J. Dolph; J. K. Gaison; A. Galindo-Uribarri; K. Gilje; A. Glenn; B. W. Goddard; M. Green; K. Han; S. Hans; K. M. Heeger; B. Heffron; D. E. Jaffe; D. Jones; T. J. Langford; B. R. Littlejohn; D. A. Martinez Caicedo; R. D. McKeown; M. P. Mendenhall; P....

eye 9

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The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is designed to make a precise measurement of the antineutrino spectrum from a highly-enriched uranium reactor and probe eV-scale sterile neutrinos by searching for neutrino oscillations over meter-long distances. PROSPECT is conceived as a 2-phase experiment utilizing segmented $^6$Li-doped liquid scintillator detectors for both efficient detection of reactor antineutrinos through the inverse beta decay reaction and excellent...
Topics: High Energy Physics - Experiment, Instrumentation and Detectors, Nuclear Experiment, Physics
Source: http://arxiv.org/abs/1512.02202

Arxiv.org

65 65

After LUX: The LZ Program

Sep 23, 2013 09/13

by D. C. Malling; D. S. Akerib; H. M. Araujo; X. Bai; S. Bedikian; E. Bernard; A. Bernstein; A. Bradley; S. B. Cahn; M. C. Carmona-Benitez; D. Carr; J. J. Chapman; K. Clark; T. Classen; T. Coffey; A. Curioni; A. Currie; S. Dazeley; L. de Viveiros; M. Dragowsky; E. Druszkiewicz; C. H. Faham; S. Fiorucci; R. J. Gaitskell; K. R. Gibson; C. Hall; M. Hanhardt; B. Holbrook; M. Ihm; R. G. Jacobsen; L. Kastens; K. Kazkaz; R. Lander; N. Larsen; C. Lee; D. Leonard; K. Lesko; A. Lindote; M. I. Lopes; A....

eye 65

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The LZ program consists of two stages of direct dark matter searches using liquid Xe detectors. The first stage will be a 1.5-3 tonne detector, while the last stage will be a 20 tonne detector. Both devices will benefit tremendously from research and development performed for the LUX experiment, a 350 kg liquid Xe dark matter detector currently operating at the Sanford Underground Laboratory. In particular, the technology used for cryogenics and electrical feedthroughs, circulation and...
Source: http://arxiv.org/abs/1110.0103v2

Arxiv.org

84 84

The Large Underground Xenon (LUX) Experiment

Sep 18, 2013 09/13

by D. S. Akerib; X. Bai; S. Bedikian; E. Bernard; A. Bernstein; A. Bolozdynya; A. Bradley; D. Byram; S. B. Cahn; C. Camp; M. C. Carmona-Benitez; D. Carr; J. J. Chapman; A. Chiller; C. Chiller; K. Clark; T. Classen; T. Coffey; A. Curioni; E. Dahl; S. Dazeley; L. de Viveiros; A. Dobi; E. Dragowsky; E. Druszkiewicz; B. Edwards; C. H. Faham; S. Fiorucci; R. J. Gaitskell; K. R. Gibson; M. Gilchriese; C. Hall; M. Hanhardt; B. Holbrook; M. Ihm; R. G. Jacobsen; L. Kastens; K. Kazkaz; R. Knoche; S. Kyre;...

eye 84

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The Large Underground Xenon (LUX) collaboration has designed and constructed a dual-phase xenon detector, in order to conduct a search for Weakly Interacting Massive Particles(WIMPs), a leading dark matter candidate. The goal of the LUX detector is to clearly detect (or exclude) WIMPS with a spin independent cross section per nucleon of $2\times 10^{-46}$ cm$^{2}$, equivalent to $\sim$1 event/100 kg/month in the inner 100-kg fiducial volume (FV) of the 370-kg detector. The overall background...
Source: http://arxiv.org/abs/1211.3788v2

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

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

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

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

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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