Background Rejection of Charged Particles in the Simbol-X Telescope: Preliminary Study of Protons Scattering

Details Background Rejection of Charged Particles in the Simbol-X Telescope: Preliminary Study of Protons Scattering Background Rejection of Charged Particles in the Simbol-X Telescope: Preliminary Study of Protons Scattering

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1126...72d&link_type=abstract

SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium. AIP Conference Proceedi

Physics

Optics

X- And Gamma-Ray Telescopes And Instrumentation, X-Ray Beams And X-Ray Optics, Lenses, Prisms And Mirrors

Scientific paper

X-ray telescopes equipped with focusing optics in high eccentric orbit, as e.g. Newton-XMM and Chandra, showed a degradation of the detector performance and an important increase of the noise due to soft protons with energy between a few tens of keV and a few MeV, that are focused on the detector through the mirror module. It should be noted that the focusing of the protons by Wolter optics was an unexpected phenomenon. In Simbol-X a magnetic diverter will be implemented to deflect protons, in order to reduce the flux of charged particles impinging upon the focal plane. Obviously the design of the diverter should take into consideration the protons distribution at the exit of the mirror module; for this reason a detailed simulation about the interaction of particles with the mirror surface is necessary. Here we will present the scattering protons models currently under consideration, suggesting a preliminary solution for the design of the magnetic diverter. We will also discuss an ad hoc experiment to study this problem.

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