RESULTS ON HIGH-ENERGY COSMIC-RAYS BY EAS-TOP AT GRAN-SASSO

Very High-Energy cosmic rays have to be studied through the ground-bas ed detectors of the Extensive Air Showers (EAS) that they produce in t he atmosphepe. The main measurements to be performed are of: primary e nergy spectra, composition, anisotropies, <<neutral primary>> astronom y, and interaction properties. This requires complete detectors of all the EAS components, and for this purpose the EAS-TOP array has been c onstructed at Campo Imperatore (2000 m a.s.l.) on top of the Gran Sass o underground laboratories. The array has been progressively going int o operation since 1988. In this paper we present the status and perfor mances of the different detectors, and the results obtained up to now on the different items under discussion.