GAMMA experiment is a study of: a) Primary cosmic ray energy spectra and elemental composition (abundances of the elements) at energies 10¹⁵–10¹⁸eV (so called knee energy region) b) Galactic diffuse gamma-ray intensity at energies 10¹⁴–10¹⁵eV, c) Extensive Air Showers (EAS) at the mountain level by the ground-based EAS array and underground muon scintillation counters, d) Hard jets production at energies ~10¹⁶eV by the muon multi-core shower events.

Gamma (uppercase , lowercase ; Gámma) is the third letter of the Greek alphabet. In the system of Greek numerals it has a value of 3. It was derived from the Phoenician letter Gimel . Letters that arose from gamma include the Roman C and G and the Cyrillic letters Г and Ґ.