The IceCube-Gen2 Surface Array

IceCube-Gen2 will extend the science reach of the current IceCube Neutrino Observatory at the South Pole in many ways. The optical array in the ice will be enlarged by an order of magnitude to increase the exposure for astrophysical TeV and PeV neutrions, and be complemented by a large radio array to search for neutrinos at even higher energies. A surface array will cover the footprint of the optical array. In addition to its function as a veto, this surface array will enable a strong cosmic-ray science case including both, the particle physics and astrophysics aspects of cosmic-ray physics. The combination of elevated scintillation and radio detectors at the surface with the in-ice optical array will make IceCube-Gen2 a unique laboratory for the particle physics in air showers, which enables new studies of the production of atmospheric leptons at TeV to PeV energies, such as prompt muons. Moreover, IceCube-Gen2 will feature a high aperture in combination with a high measurement accuracy for cosmic rays in the energy range of the assumed transition from Galactic to extragalactic sources, and may shed light on the still unkown origin of the most energetic Galactic cosmic rays.