Cosmic Ray Experiments in the Era of LHC

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Many uncertainties in cosmic ray experiments will be eliminated with more measurements about interaction between nucleons in the Large Hadron Collider (LHC) experiment. Cosmic ray experiments will enter an era marked by the high precision of measurements carried out by combining multipurpose instruments on very large scales. They have been putting strict constraints on models of cosmic ray acceleration at sources and propagation through the universe. Measurements of electrons, all kinds of nuclei, even gamma rays and neutrinos will enhance the opportunity of breakthrough in solving the mystery of origin of cosmic rays or even finding the source of the dark matter. A fundamental problem in cosmic ray experiments is the energy scale of ground based experiments for ultra high energy cosmic rays. A unique and straightforward approach is to match the energy spectra of nuclei measured by space or balloon borne experiments with what measured by ground based detectors at high altitudes and propagate the scale up to the cut‐off of the spectrum, so that complete, consistent, unique and reliable measurements will be performed on their energy spectrum, composition and anisotropy.