The project of comprehensive cosmic ray investigations with mountain elevation experimental setups in the energy range 10(15-)10(18) eV

The project of upgrading of two currently operating experimental setups, i. e., the Pamir and the Hadron setups, located at high mountain altitudes is proposed for comprehensive investigations of the primary cosmic rays (PCR) in the energy range 1-1000 PeV. The main goals of the project are the resea rch of primary energy spectrum peculiarities, namely, the direct and feasib le reverse bends of the spectrum and the study of the PCR mass composition as well as revealing the nature of some new phenomena in cosmic rays recent ly observed at mountain elevations.