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@PHDTHESIS{Schoppmann:679278,
author = {Schoppmann, Stefan},
othercontributors = {Stahl, Achim and Wiebusch, Christopher},
title = {{F}irst {M}easurement of $\theta_{13}$ with the final two
detector setup of the double chooz experiment},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Aachen},
reportid = {RWTH-2016-11063},
pages = {1 Online-Ressource (xv, 141 Seite) : Illustrationen,
Diagramme},
year = {2016},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University 2017; Dissertation, RWTH Aachen University, 2016},
abstract = {The Double Chooz experiment is a reactor antineutrino
disappearance experiment located at the nuclear power plant
CHOOZ-B near the village of Chooz, France. The aim of the
experiment is a high precision measurement of the neutrino
oscillation amplitude $\sin^{2}(2\theta_{13})$. The
experiment is built of two identical liquid scintillator
detectors. They measure the neutrino oscillations on two
distinct baselines using the flux of electron-antineutrinos
originating from two nuclear reactors. After a single
detector phase starting in 2011, the second detector has
been commissioned in early 2015. In its first part, this
work describes the design, implementation and commissioning
of the data handling system responsible for the collection
and transfer of the majority of the recorded experiment
data. The system replaces the former single detector setup
and provides several new fail-safe and diagnostic features.
It is a multi-server MySQL-based setup interleaved with the
laboratory systems in Chooz on the one end and the central
computing facility of the in2p3 institute on the other end.
The system is shown to have excellent performance allowing
for both, unimpaired data acquisition in the laboratories
and data processing in the computing centre. Additionally,
the system is basis for an experiment-wide general purpose
monitoring tool. In the second part of this work, a newly
developed oscillation analysis approach for the Double Chooz
data is presented. It utilises rate and spectral shape
information. For the first time, it offers the possibility
to include a full three flavour oscillation model into the
oscillation analysis. Furthermore, a detailed treatment of
energy scale non-linearities in the oscillation analysis is
developed. Moreover, the novel adaptive modelling of
spectral shape uncertainties reveals better insights to the
treatment of the reactor flux uncertainties within the
oscillation analysis. With the new approach, the first two
detector data of the Double Chooz experiment is analysed in
addition to the formerly recorded one-detector data. Due to
the extended dataset, the Double Chooz experiment
successfully confirms the existence of reactor antineutrino
oscillations at the 6 σ confidence level. With the improved
precision, this analysis presents a value for the
oscillation amplitude of
$\sin^{2}(2\theta_{13})=0.117\pm0.019$ assuming $\Delta
m_{ee}^{2}=(2.44 \pm 0.09) \cdot 10^{-3}\text{eV}^{2}$ and
normal mass hierarchy.},
cin = {133510 / 130000},
ddc = {530},
cid = {$I:(DE-82)133510_20140620$ / $I:(DE-82)130000_20140620$},
pnm = {GRK 1675 - GRK 1675: Teilchen- und Astroteilchenphysik im
Lichte von LHC (164315326)},
pid = {G:(GEPRIS)164315326},
typ = {PUB:(DE-HGF)11},
urn = {urn:nbn:de:hbz:82-rwth-2016-110633},
doi = {10.18154/RWTH-2016-11063},
url = {https://publications.rwth-aachen.de/record/679278},
}
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