Stuttgart 2012 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 14: Poster Sonne und Heliosphäre

EP 14.9: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.V

A High-Energy Telescope for Solar Orbiter Mission: Initial Results of Prototype of High-Energy Telescope — •Jan Grunau, Shrinivasrao R. Kulkarni, Cesar Martin, Robert F. Wimmer-Schweingruber, Stephan Boettcher, Eckart Böhm, Lars Seimetz, Björn Schuster, Alexander Kulemzin, and Toni Krüger — IEAP, University of Kiel, Leibnizstrasse 11, Kiel, D-24118, Germany

The High-Energy Telescope (HET) on ESA's Solar Orbiter mission, will measure electrons from 300 keV up to about 30 MeV, protons from 10 to 100 MeV and heavy ions from approximately 20 to 200 MeV/nuc. Thus, HET covers the energy range which is of specific interest for studies of the space environment and will perform the measurements needed to understand the origin of high-energy events at the Sun which occasionally accelerate particles to such high energies that they can penetrate the Earth's atmosphere and be measured at ground level (ground-level events). These measurement capabilities are reached by a combination of solid-state detectors and a scintillator calorimeter which allows use of the dE/dx vs total E technique for particle identification and energy measurement. The upper limits on energy listed above refer to particles (ions) stopping in the scintillator and careful modeling of HET properties will allow discrimination of forward/backward penetrating particles in a wider energy range. Here we will present initial calibration results of the HET prototype and compare them with GEANT4 simulations.