The GAMMA experiment is a study of: Primary cosmic ray energy spectra and elemental composition at energies 1015–1018eV Galactic diffuse gamma-ray intensity at energies 1014–1015eV Extensive Air Showers at the mountain level by the ground-based EAS array and underground muon scintillation counters Hard jets production at energies ~1016eV by the muon multi-core shower eventsThe GAMMA experiment is deployed on the South side of Mount Aragats in Armenia. Wikipedia