Title of article
Prototype study of the Cherenkov imager of the AMS experiment
Author/Authors
Aguayo، نويسنده , , P. and Aguilar-Benitez، نويسنده , , M. and Arruda، نويسنده , , L. and Barao، نويسنده , , F. and Barreira، نويسنده , , G. and Barrau، نويسنده , , A. and Baret، نويسنده , , B. and Belmont، نويسنده , , E. and Berdugo، نويسنده , , J. and Boudoul، نويسنده , , G. and Borges، نويسنده , , J. and Buénerd، نويسنده , , M. A. Casadei، نويسنده , , D. and Casaus، نويسنده , , J. and Delgado، نويسنده , , C. and Diaz، نويسنده , , C. and Derome، نويسنده , , L. and Eraud، نويسنده , , L. and Gallin-Martel، نويسنده , , L. and Giovacchini، نويسنده , , F. and Goncalves، نويسنده , , P. and Lanciotti، نويسنده , , E. and Laurenti، نويسنده , , G. and Malinine، نويسنده , , A. and Maٌل، نويسنده , , C. and Marيn، نويسنده , , J. and Martinez، نويسنده , , G. and Menchaca-Rocha، نويسنده , , A. and Palomares، نويسنده , , C. and Pereira، نويسنده , , R. and Pimenta، نويسنده , , M. and Protasov، نويسنده , , K. and Sanchez، نويسنده , , E. and Seo، نويسنده , , E.-S. and Sevilla، نويسنده , , I. and Torrentَ، نويسنده , , A. and Vargas-Trevino، نويسنده , , M. and Véziant، نويسنده , , O.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
12
From page
291
To page
302
Abstract
The AMS experiment includes a Cherenkov imager for mass and charge identification of charged cosmic rays. A second generation prototype has been constructed and its performances evaluated both with cosmic ray particles and with beam ions. In-beam tests have been performed using secondary nuclei from the fragmentation of 20 GeV / c per nucleon Pb ions and 158 GeV / c per nucleon In from the CERN SPS in 2002 and 2003. Partial results are reported. The performances of the prototype for the velocity and the charge measurements have been studied over the range of ion charge Z ≲ 30 . A sample of candidate silica aerogel radiators for the flight model of the detector has been tested. The measured velocity resolution of the detector was found to scale with Z - 1 as expected, with a value σ ( β ) / β ≈ 0.7 – 110 - 3 for singly charged particles and an asymptotic limit in Z of 0.4– 0.6 × 10 - 4 . The measured charge resolution obtained for the n = 1.05 aerogel radiator material selected for the flight model of the detector is σ ( Z ) = 0.18 (statistical) ⊕ 0.015 (systematic), ensuring a good charge separation up to the iron element, for the prototype in the reported experimental conditions.
Keywords
Cherenkov imaging , Space instrumentation , Charge measurement , Charged particle detectors
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2006
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2200411
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