In the end of the 1940s and the beginning of the 1950s, the main points of interest of the researchers at the Yerevan Institute of Physics were cosmic rays and the physics of elementary particles. One of the problems bothering experimental physicists working with cosmic rays at that time were measurements of very high energies of the relativistic particles in the cosmic radiation, as with the increase of energy levels of the particles the available methods of registration of their energies were becoming less and less effective.