Background Light in Potential Sites for the ANTARES Undersea Neutrino Telescope

The ANTARES collaboration has performed a series of {\em in situ} measurements to study the background light for a planned undersea neutrino telescope. Such background can be caused by $^{40}$K decays or by biological activity. We report on measurements at two sites in the Mediterranean Sea at depths of 2400~m and 2700~m, respectively. Three photomultiplier tubes were used to measure single counting rates and coincidence rates for pairs of tubes at various distances. The background rate is seen to consist of three components: a constant rate due to $^{40}$K decays, a continuum rate that varies on a time scale of several hours simultaneously over distances up to at least 40~m, and random bursts a few seconds long that are only correlated in time over distances of the order of a meter. A trigger requiring coincidences between nearby photomultiplier tubes should reduce the trigger rate for a neutrino telescope to a manageable level with only a small loss in efficiency.Comment: 18 pages, 8 figures, accepted for publication in Astroparticle Physic

The ANTARES Optical Module

The ANTARES collaboration is building a deep sea neutrino telescope in the Mediterranean Sea. This detector will cover a sensitive area of typically 0.1 km-squared and will be equipped with about 1000 optical modules. Each of these optical modules consists of a large area photomultiplier and its associated electronics housed in a pressure resistant glass sphere. The design of the ANTARES optical module, which is a key element of the detector, has been finalized following extensive R & D studies and is reviewed here in detail.Comment: 26 pages, 15 figures, to be published in NI

Baillou (Jean), Pelletier (Pierre) - Les Affaires étrangères. Introduction de Jacques de Bourbon-Busset

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Technocratie et administration

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Kessler (Marie-Christine) - Les grands corps de l'Etat.

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Tiano (André) - Les Traitements des fonctionnaires et leur détermination (1930-1957)

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Baillou (Jean), Pelletier (Pierre) - Les Affaires étrangères. Introduction de Jacques de Bourbon-Busset

Gournay Bernard. Baillou (Jean), Pelletier (Pierre) - Les Affaires étrangères. Introduction de Jacques de Bourbon-Busset. In: Revue française de science politique, 14ᵉ année, n°3, 1964. pp. 577-581