Underground cosmic-ray experiment EMMA
Kuusiniemi, P., Bezrukov, L., Enqvist, T., Fynbo, H., Inzhechik, ., Joutsenvaara, J., . . . Virkajärvi, A. (2013). Underground cosmic-ray experiment EMMA. In 23rd European Cosmic Ray Symposium (and 32nd Russian Cosmic Ray Conference) 3–7 July 2012, Moscow, Russia. Journal of Physics: Conference Series (409). Bristol: Institute of Physics. doi:10.1088/1742-6596/409/1/012067
Published inJournal of Physics: Conference Series;409
Loo, Kai |
© Published under licence by IOP Publishing Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) licence.
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 Pyh¨asalmi 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.