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  • Underground cosmic-ray expe...
    Kuusiniemi, P; Bezrukov, L; Enqvist, T; Fynbo, H; Inzhechik, L; Joutsenvaara, J; Kalliokoski, T; Loo, K; Lubsandorzhiev, B; Monto, T; Petkov, V; Räihä, T; Sarkamo, J; Slupecki, M; Trzaska, W H; Virkajärvi, A

    Journal of physics. Conference series, 01/2013, Letnik: 409, Številka: 1
    Journal Article

    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.