Zone d'identification
Cote
Titre
Date(s)
- 1990 (Création/Production)
Niveau de description
Étendue matérielle et support
Object
Zone du contexte
Histoire archivistique
Source immédiate d'acquisition ou de transfert
Zone du contenu et de la structure
Portée et contenu
This is a calorimeter, a detector which measures the energy of particles. When in use, it is filled with liquid krypton at -152°C. Electrons and photons passing through interact with the krypton, creating a shower of charged particles which are collected on the copper ribbons. The ribbons are aligned to an accuracy of a tenth of a millimetre. The folding at each end allows them to be kept absolutely flat. Each shower of particles also creates a signal in scintillating material embedded in the support disks. These flashes of light are transmitted to electronics by the optical fibres along the side of the detector. They give the time at which the interaction occurred. The photo shows the calorimeter at NA48, a CERN experiment which is trying to understand the lack of anti-matter in the Universe today.
Évaluation, élimination et calendrier de conservation
Accroissements
Mode de classement
Zone des conditions d'accès et d'utilisation
Conditions d'accès
Public
Conditions de reproduction
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Écriture des documents
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Caractéristiques matérielle et contraintes techniques
1,32m 1,80m 0,76m
Instruments de recherche
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Existence et lieu de conservation des originaux
Available, 282.
