Silicon calorimeter for cosmic antimatter search

doi:10.1016/0920-5632(93)90011-T

Nuclear Physics B - Proceedings Supplements

Volume 32, May 1993, Pages 77-82

https://doi.org/10.1016/0920-5632(93)90011-T Get rights and content

Abstract

The silicon sampling calorimeter presented is conceived as a fine grained imaging device to carry out studies of the anti-matter component in the primary cosmic radiation; it will be used in balloon payload program starting in 1993. The first sampling layer (48×48 cm²) of this silicon calorimeter has been completed and successfully tested. We report the first results form studies performed at the CERN PS t₇ beam.

The complete calorimeter contains 20 xy sampling layers (strip pitch 3.6 mm) interleaved with 19 showering material planes (tungsten 0.5 X₀). This allows to picture the transverse distributions of the shower in both coordinates at each sampling. The outstanding imaging capabilities reflects in high particle identification power. Preliminary results from beam tests performed with antiprotons at 3.5 GeV on a tower prototype of the calorimeter are reported.

References (5)

R.L. Golden
Nuovo Cimento
(1990)
G. Barbiellini, G. Basini, V. Bidoli, M. Bocciolini, M. Boezio, F. Bongiorno, F. Massimo Brancaccio, M.T. Brunetti, M....

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^∗: Also at Dipartimento di Metodi e Modelli Matematici dell'Università “La Sapienza”, Roma Italy.

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Silicon calorimeter for cosmic antimatter search

Abstract

Nuovo Cimento