Göttingen 2025 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 12: Sun and Heliosphere V
EP 12.6: Vortrag
Donnerstag, 3. April 2025, 17:45–18:00, ZHG101
Refining the GEANT4 model of EPHIN — •Malte Hörlöck1, Bernd Heber1, Stefan Jensen1, Patrick Kühl1, and Holger Sierks2 — 1Christian-Albrechts-Universität, Kiel — 2Max-Planck-Institut für Sonnensystemforschung, Göttingen
The Electron Proton Helium INstrument (EPHIN) aboard SOHO is designed to measure electrons, protons and Helium. It is operating since 1995. GEANT4 simulations are extensively used to produce response functions needed to obtain primary quantities (like fluxes) from the quantities that EPHIN provides. Starting from an idealized model representing the nominal design of EPHIN and using calibration measurements performed at the Hahn-Meitner-Institut in Berlin, we demonstrate the development of a refined model including deadlayers, more precise detector dimensions and a model representing the SOHO spacecraft. This work received funding from the BMWI (50OC2302,50OC2404) and the EU (101135044 - SPEARHEAD).
Keywords: Instrumentation; Cosmic Rays; Calibration