Observation of high-energy gamma-rays with the AMS-02 electromagnetic calorimeter

Morescalchi, L. (2017) Observation of high-energy gamma-rays with the AMS-02 electromagnetic calorimeter. Il nuovo cimento C, 40 (3). pp. 1-6. ISSN 1826-9885

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Abstract

The Alpha Magnetic Spectrometer (AMS-02) is a multipurpose astroparticle physics detector installed on the International Space Station (ISS). Since more than 5 years it is measuring with an unprecedented accuracy flux and composition of primary cosmic rays, searching for primordial anti-matter and probing the nature of dark matter. Despite the fact that AMS-02 has been primarily designed as a charged-particle spectrometer, it can also perform precision observations of γ-rays from a few GeV to beyond one TeV. The key sub-detector used for the photon identification is a lead-scintillating fibers sampling calorimeter (ECAL). Its high granularity allows to reconstruct the direction of the incoming photon with a resolution better than 1 degree. The 3D shower image reconstructed by the calorimeter together with the absence of hits along the reconstructed photon direction allow to reach a very good signal over background ratio. This experimental technique offers the unusual possibility to reconstruct a sky map of the very high-energy photon sources.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 17 Nov 2020 09:46
Last Modified: 17 Nov 2020 09:46
URI: http://eprints.bice.rm.cnr.it/id/eprint/19927

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