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Underground cosmic-ray experiment EMMA

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, , Citation P Kuusiniemi et al 2013 J. Phys.: Conf. Ser. 409 012067 DOI 10.1088/1742-6596/409/1/012067

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Author affiliations

1 Oulu Southern Institute and Department of Physics, University of Oulu, Finland

2 Institute of Nuclear Research, Russian Academy of Sciences, Moscow, Russia

3 Department of Physics and Astronomy, University of Aarhus, Denmark

4 Moscow Institute of Physics and Technology, Russia

5 Department of Physics, University of Jyväskylä, Finland

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1742-6596/409/1/012067

Abstract

EMMA (Experiment with MultiMuon Array) is a new approach to study the composition of cosmic rays at the knee region (1 – 10 PeV). The array will measure the multiplicity and lateral distribution of the high-energy muon component of an air shower and its arrival direction on an event-by-event basis. The array operates in the Pyhäsalmi Mine, Finland, at a depth of 75 metres (or 210 m.w.e) corresponding to the cut-off energy of approximately 50 GeV for vertical muons. The data recording with a partial array has started and preliminary results of the first test runs are presented.

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10.1088/1742-6596/409/1/012067