Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 20: Cosmic Rays I

T 20.3: Talk

Monday, March 16, 2026, 16:45–17:00, KS 00.006

Cosmic-Ray energy spectrum measurements with IceTop — •Fahim Varsi for the IceCube collaboration — Karlsruhe Institute of Technology, Karlsruhe, Germany

IceTop, the surface ice-Cherenkov array of the IceCube Neutrino Observatory, detects extensive air showers generated from the interaction of the cosmic rays with the atmosphere. It measures cosmic rays in the PeV-EeV energy range, targeting the transition region between galactic and extragalactic cosmic-ray origins, including spectral features such as the knee and the second knee. A novel two-component LDF method is used for event reconstruction, providing an energy estimator along with mass-dependent parameters. An unfolding procedure is then employed to derive the all-particle energy spectrum from the energy estimator parameter. The details of the analysis will be presented in the conference.

Keywords: energy spectrum; consmic rays; Icetop; EAS reconstruction; Unfolding