Аннотация:A new method for selecting a certain part of the proton-induced events from the bulk of the primary nuclei events is presented. The method uses the shape of EAS Cherenkov light lateral distribution (CLLD) and is based on a few hundreds of artificial events by 10-30 PeV protons and helium nuclei simulated with CORSIKA/QGSJET-I/QGSJET-II code. Distribution of the proton CLLD steepness parameter has a long tail which is absent in helium distribution. The tail contains about 10% of the proton sample which could be distinguished from other nuclei events. The method was adapted to the geometry and conditions of SPHERE-2 telescope and proved to be capable of proton event selection.
