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Mesures des neutrinos de réacteurs nucléaires dans l'expérience BOREXINO

Abstract : The main goal of the Borexino experiment is to measure in real time the solar neutrino flux from the beryllium line at 862 keV. Beyond this pioneer low energy neutrino detection, Borexino will be able to measure solar neutrinos above the MeV, (8B neutrinos and pep neutrinos), nuclear reactor neutrinos (with an average energy of 3 MeV) and the supernovæ neutrinos (their spectrum goes up to some ten MeV). In this work I mainly focus on the study of the nuclear reactors neutrinos. This field has recently been enriched by the results of the KamLAND experiment, which have greatly improved the determination of the neutrino oscillation parameters. In order to measure these events which are above the MeV, the Borexino collaboration entrusted the PCC group, Collège de France, with the tasks of developing a fast digitalization system running at 400MHz : the FADC cards. The PCC group designed the FADC cards and completed them at the beginning of 2002. The first cards which were introduced in the main electronic acquisition allowed us to control their functioning and that of the acquisition software. FADC cards were also installed in the Borexino prototype, CTF. The data are analysed in order to determine a limit to the expected background noise of Borexino in measuring the nuclear reactor neutrinos.
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https://tel.archives-ouvertes.fr/tel-00003455
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Submitted on : Wednesday, October 1, 2003 - 12:40:25 PM
Last modification on : Wednesday, September 23, 2020 - 4:34:17 AM
Long-term archiving on: : Friday, April 2, 2010 - 7:33:54 PM

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  • HAL Id : tel-00003455, version 1

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PCC | CNRS | IN2P3 | CDF | PSL

Citation

Olivier Dadoun. Mesures des neutrinos de réacteurs nucléaires dans l'expérience BOREXINO. Astrophysique [astro-ph]. Université Paris-Diderot - Paris VII, 2003. Français. ⟨tel-00003455⟩

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