Etude et impact du bruit de fond corrÃ©lÃ© pour la mesure de l'angle ...

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44 3. The Double Chooz experiment EDF Chooz reactors: Power: 8.5 GWth Near detector: distance: ~400 m overbound: 120 mwe target: 8.2 t signal: ~400 ν/d Far detector: distance: ~1050 m overbound: 300 mwe target: 8.2 t signal: ~50 ν/d tel-00821629, version 1 - 11 May 2013 Figure 3.2: Aerial view of the experimental site. April 2011. The near laboratory hall construction is expected to finish by the end of 2012 and the ND is expected to start data taking by the end of 2013. An aerial view of the experimental site is shown in Fig. 3.2. The DC detector has been inspired by the former experiment CHOOZ. The detector design is shown in Fig. 3.3 and consists in three optically isolated sub-detectors: the inner detector (ID), the inner-veto (IV) and the outerveto (OV). The ID consists of 3 cylindrical volumes namely, from inside to outside, target, gamma catcher and bu↵er. The IV is a cylindrical volume surrounding the ID. The OV is installed on the top of the cylindrical detectors and both for electronics and read-out point of views, is independent from the ID and the IV. The setup has been optimised towards an higher neutrino detection rate and a larger signal over background ratio. The detector components have been chosen in order to constrain the radioactivity background level below 10 Bq in the ID [37].
3.1 The Double Chooz detector 45 tel-00821629, version 1 - 11 May 2013 Figure 3.3: The DC FD design.
Page 1 and 2: UNIVERSITÉ DENANTES FACULTÉ DES S
Page 3 and 4: tel-00821629, version 1 - 11 May 20
Page 5 and 6: Abstract tel-00821629, version 1 -
Page 7 and 8: Acknowledgments Since so many peopl
Page 9 and 10: Contents 1 Introduction 13 tel-0082
Page 11 and 12: CONTENTS 11 tel-00821629, version 1
Page 13 and 14: Chapter 1 Introduction tel-00821629
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Page 17 and 18: Chapter 2 Neutrino physics tel-0082
Page 19 and 20: 2.2 Neutrino history in brief 19 ma
Page 21 and 22: 2.3 Neutrino oscillation, the theor
Page 23 and 24: 2.4 Measuring neutrino oscillation
Page 25 and 26: 3-flavour oscillations The dominant
Page 29 and 30: After the Sun, the other main natur
Page 35 and 36: 2.5 The problem with the neutrino m
Page 37 and 38: 2.6 Summary and open questions 37 s
Page 39 and 40: In the next future, reactor experim
Page 41 and 42: Chapter 3 The Double Chooz experime
Page 43: 3.1 The Double Chooz detector 43 to
Page 47 and 48: 3.1 The Double Chooz detector 47 it
Page 49 and 50: 3.1 The Double Chooz detector 49 te
Page 51 and 52: 3.2 The detector read-out 51 40 m o
Page 53 and 54: 3.3 The online system 53 IV trigger
Page 55 and 56: 3.3 The online system 55 tions as s
Page 57 and 58: 3.3 The online system 57 tel-008216
Page 59 and 60: 3.4 The calibration system 59 tel-0
Page 61 and 62: loosing their kinetic energy 3 and
Page 63 and 64: 3.5 Reactor neutrino flux simulatio
Page 69 and 70: 3.8 Data reconstruction 69 A dedica
Page 71 and 72: Regarding the pulse information, th
Page 73 and 74: 3.8 Data reconstruction 73 tel-0082
Page 75 and 76: 3.8 Data reconstruction 75 Gain (ch
Page 77 and 78: 3.9 Conclusions 77 tel-00821629, ve
Page 79 and 80: Chapter 4 Measurement of ✓ 13 wit
Page 81 and 82: 4.1 Data sample 81 create a signal
Page 83 and 84: 4.2 ¯⌫ e signal selection 83 Liv
Page 85 and 86: 4.2 ¯⌫ e signal selection 85 Pro
Page 87 and 88: 4.2 ¯⌫ e signal selection 87 Neu
Page 89 and 90: 4.3 Backgrounds 89 energy spectrum
Page 91 and 92: 4.3 Backgrounds 91 tel-00821629, ve
Page 93 and 94: 4.4 Selection e ciencies and system
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4$&14+#':"'$"$468'#21%$;' ! $"$468'
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4.4 Selection ! e ciencies and syst
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4.5 Data analysis summary 99 4.4.3
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4.6 Final fit and measurement of
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4.6 Final fit and measurement of
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4.7 Summary and Conclusions 105 tel
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Chapter 5 Correlated background tel
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5.1 Measuring correlated background
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5.2 High energy analysis 111 in a l
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5.2 High energy analysis 113 tel-00
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5.3 OV Tag analysis 115 The t cut v
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5.4 Fast Neutrons analysis 117 bigg
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5.4 Fast Neutrons analysis 119 5.4.
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5.4 Fast Neutrons analysis 121 tel-
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5.4 Fast Neutrons analysis 123 esti
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5.4 Fast Neutrons analysis 125 Corr
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5.4 Fast Neutrons analysis 129 Prom
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5.4 Fast Neutrons analysis 131 lect
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5.4 Fast Neutrons analysis 133 mari
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5.5 Stopping Muon analysis 139 5.5.
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5.5 Stopping Muon analysis 141 tel-
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5.5 Stopping Muon analysis 143 tel-
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5.5 Stopping Muon analysis 145 Sour
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5.5 Stopping Muon analysis 147 belo
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5.5 Stopping Muon analysis 149 The
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5.6 Estimation of correlated backgr
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5.7 Conclusion 157 5.7 Conclusion t
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Chapter 6 Conclusions tel-00821629,
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161 • The SM analysis could be im
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Chapter 7 Contributions to Double C
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165 from this study and from [64] f
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List of Figures tel-00821629, versi
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LIST OF FIGURES 169 tel-00821629, v
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List of Tables 3.1 Mean energy rele
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Bibliography [1] [2] tel-00821629,
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BIBLIOGRAPHY 183 [31] J.K. Ahn et a
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BIBLIOGRAPHY 185 [61] W. Hampel et
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BIBLIOGRAPHY 187 [92] A. Stueken et
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