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Proceedings Paper

Analysis of proton propagation through the eROSITA telescope
Author(s): E. Perinati; T. Mineo; M. Freyberg; S. Diebold; A. Santangelo; C. Tenzer
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Paper Abstract

The German telescope eROSITA will be the first X-ray instrument orbiting around the L-2 lagrangian point. Therefore, modelling the radiation environment in that region of space and its interaction with the instrument is particularly important, as no measured data of other X-ray detectors can be used as a reference to predict how the space conditions will impact the instrumental capabilities. The orbit around L-2 extends well beyond the Earth´s magnetosphere, where the flux of galactic cosmic particles is cut by the geomagnetic field, and fluxes of energetic particles one order of magnitude higher than in low Earth orbits are expected. Furthermore, as experienced by Chandra and XMM-Newton, softer protons may be scattered through the mirror shells and funneled to the focal plane, representing a potential additional source of background. To investigate and assess this component we are developing a ray tracing simulator for protons, that follows the track of each proton from the entrance pupil down to the focal plane. As a first step of analysis, we report here the estimate of the proton reflection efficiency for the eROSITA mirror shells obtained using a dataset of reflectivity parameters for Gold based on TRIM simulations.

Paper Details

Date Published: 24 July 2014
PDF: 6 pages
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91444V (24 July 2014); doi: 10.1117/12.2054738
Show Author Affiliations
E. Perinati, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
T. Mineo, INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (Italy)
M. Freyberg, Max-Planck-Institut für extraterrestrische Physik (Germany)
S. Diebold, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
A. Santangelo, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
C. Tenzer, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)


Published in SPIE Proceedings Vol. 9144:
Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Jan-Willem A. den Herder; Mark Bautz, Editor(s)

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