Latest results from the KASCADE-Grande experiment

Abstract The KASCADE-Grande experiment operated at KIT from January 2004 to November 2012, measuring EAS generated by primary cosmic rays in the 10 16 –10 18  eV energy range. The experiment detected, for each single event, with a high resolution, the total number of charged particles ( N ch ) and of muons ( N μ ). In this contribution we present the latest results about: (i) The measurement of the all particle energy spectrum, discussing the influence of the hadronic interaction model used to derive the energy calibration of the experimental data. (ii) The energy spectra derived separating the events according to the N μ / N ch ratio. This technique allowed us to unveil a steepening of the spectrum of heavy primaries at E ~ 10 16.92 ± 0.04 eV and a hardening of the spectrum of light primaries at E ~ 10 17.08 ± 0.08 eV . (iii) The elemental spectra (for five mass groups) obtained applying a detailed unfolding analysis technique. (iv) A search for large scale anisotropies.