Bonn 2010 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 3: Poster

EP 3.22: Poster

Monday, March 15, 2010, 17:45–19:00, AKM Foyer

Geant4-Simulations for EPT onboard Solar Orbiter — •Rolf Paspirgilis — Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Kiel, Leibnizstraße 11, 24118 Kiel

The ESA mission Solar Orbiter will investigate the sun’s atmosphere and heliosphere from a distance between 0.23 AU and >1 AU. Onboard, the Energetic Particle Detector (EPD) will measure the composition, time series and distribution functions of suprathermal and energetic particles. The EPD consists of five seperate sensors – one of them is the Electron Proton Telescope (EPT).

The EPT is designed to detect and measure electrons, protons and α-particles with energies in the range from 20 keV to 700 keV for electrons and from 20 keV to 9 MeV for protons and α-particles. Low energy electrons and nucleons stopping in the first detector are distinguished between each other by using a foil/magnet-combination, while at higher energies the dE/dx-E-method is utilized.

We use the CERN framework Geant4 to simulate the behaviour of the EPT-design – i.e., we vary the dimensions and the setup of the design in order to determine the consequences of these variations on the particle measurement – e.g. the energy dependent geometrical factor.