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Title: Double Chooz

Abstract

The Double Chooz collaboration proposes to measure the value of the neutrino mixing angle {theta}13. The experiment will measure the flux of electron antineutrinos at two detectors placed {approx_equal}150 m and {approx_equal}1 km from the reactor cores at the Chooz nuclear power station. With 3 years of data and a relative detector normalization uncertainty of 0.6%, the error on the quantity sin2 2{theta}13 will be {+-}0.02; if {theta}13 is small, then an upper limit of 0.03 (90% CL) will be established on sin2 2{theta}13. This experiment, which could start as early as the spring of 2007, will rapidly and substantially improve on the current best limit established by CHOOZ, and will guide future experiments.

Authors:
 [1]
  1. Kansas State University, Manhattan, KS 66503 (United States)
Publication Date:
OSTI Identifier:
20729148
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 805; Journal Issue: 1; Conference: PASCOS 2005: 11. international symposium on particles, strings, and cosmology, Gyeongju (Korea, Republic of), 30 May - 4 Jun 2005; Other Information: DOI: 10.1063/1.2149690; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; ELECTRON ANTINEUTRINOS; NEUTRINO DETECTION; NEUTRINO REACTIONS; NUCLEAR POWER PLANTS; REACTOR CORES; WEINBERG ANGLE

Citation Formats

Horton-Smith, G. Double Chooz. United States: N. p., 2005. Web. doi:10.1063/1.2149690.
Horton-Smith, G. Double Chooz. United States. doi:10.1063/1.2149690.
Horton-Smith, G. Fri . "Double Chooz". United States. doi:10.1063/1.2149690.
@article{osti_20729148,
title = {Double Chooz},
author = {Horton-Smith, G.},
abstractNote = {The Double Chooz collaboration proposes to measure the value of the neutrino mixing angle {theta}13. The experiment will measure the flux of electron antineutrinos at two detectors placed {approx_equal}150 m and {approx_equal}1 km from the reactor cores at the Chooz nuclear power station. With 3 years of data and a relative detector normalization uncertainty of 0.6%, the error on the quantity sin2 2{theta}13 will be {+-}0.02; if {theta}13 is small, then an upper limit of 0.03 (90% CL) will be established on sin2 2{theta}13. This experiment, which could start as early as the spring of 2007, will rapidly and substantially improve on the current best limit established by CHOOZ, and will guide future experiments.},
doi = {10.1063/1.2149690},
journal = {AIP Conference Proceedings},
number = 1,
volume = 805,
place = {United States},
year = {Fri Dec 02 00:00:00 EST 2005},
month = {Fri Dec 02 00:00:00 EST 2005}
}
  • There is broad consensus in the worldwide physics community as to the need for a new reactor-neutrino experiment to measure or limit the neutrino mixing angle {theta}13. The Double Chooz Experiment, planned for operation in the years 2008-2011, will search for values of sin22{theta}13 down to {approx_equal}0.03. This will be the first new information on {theta}13 in over a decade and will cover most of the remaining parameter space. A quick and relatively inexpensive project is made possible by the existing neutrino laboratory at the Chooz site.
  • In scintillator detectors, the forward displacement of the neutron in the reaction {nu}{sub e}+p{yields}e{sup +}+n provides neutrino directional information as demonstrated by the CHOOZ reactor experiment with 2500 events. The near detector of the forthcoming Double Chooz experiment will collect 1.6x10{sup 5} events per year, enough to determine the average neutrino direction with a 1{sigma} half-cone aperture of 2.3 deg. in one year. It is more difficult to separate the two Chooz reactors that are viewed at a separation angle {phi}=30 deg. If their strengths are known and approximately equal, the azimuthal location of each reactor is obtained with {+-}6more » deg. (1{sigma}) and the probability of confusing them with a single source is less than 11%. Five-year's data reduce this 'confusion probability' to less than 0.3%, i.e., a 3{sigma} separation is possible. All of these numbers improve rapidly with increasing angular separation of the sources. For a setup with {phi}=90 deg. and one-year's data, the azimuthal 1{sigma} uncertainty for each source decreases to {+-}3.2 deg. Of course, for Double Chooz the two reactor locations are known, allowing one instead to measure their individual one-year integrated power output to {+-}11% (1{sigma}), and their five-year integrated output to {+-}4.8% (1{sigma})« less
  • The goal of the Double Chooz reactor experiment is the measurement of the {theta}{sub 13} neutrino mixing angle using two identical detectors at two different distance. The R and D is in the last stage and the detector construction is being started. The far detector is planned to start in 2009 and the near detector in 2010. After 3 years of operation, the sensitivity on sin{sup 2} 2{theta}{sub 13} will be 0.03. The paper presents the overview, the status and prospects of the experiment.
  • The goal of the Double Chooz experiment is to measure the value of sin{sup 2}(2{theta}{sub 13}), which is of great interest at the moment in neutrino physics. To overcome the existing limit coming from the CHOOZ experiment, we are going to use two identical detectors that will be placed at a distance of 150 m and 1.05 km from the reactor cores. This setup will allow us to decrease systematic error down to the level of a percent. In this paper, we discuss the details of the proposed experiment and the ways in which we plan to achieve the announcedmore » sensitivity.« less
  • The Double Chooz experiment will probe the last unmeasured neutrino mixing angle {theta}{sub 13} with an improved sensitivity compared to previous experiments. The initial phase of the experiment will use a single detector at a baseline of {approx}1 km to reach a sensitivity to sin{sup 2}(2{theta}{sub 13}) of 0.06 over 1.5 years of running. The second phase of the experiment will include a second identical detector at a baseline of {approx}400 m. Comparison of the neutrino rate and energy spectra between the two detectors will allow for an ultimate sensitivity to sin{sup 2}(2{theta}13) of 0.03 over a combined runtime ofmore » 5 years for both phases.« less