Simbol-X background simulation activities

Details Simbol-X background simulation activities Simbol-X background simulation activities

2008-02-26

arxiv.org/abs/0802.3846v1

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures and images, to appear in proceedings of "Simbol-X: the hard X-ray Universe in focus", held in Bologna (Ital

Scientific paper

Using the Geant4 toolkit, a Monte-Carlo code to simulate the detector background of the Simbol-X focal plane instrument has been developed with the aim to optimize the design of the instrument. Structural design models of the mirror and detector satellites have been built and used as baseline for our simulations, to evaluate the different background contributions that must be taken into account to determine the sensitivity of the Simbol-X detectors. We work towards a simulation based background and mass model which can be used before and during the mission. For different material compositions, material thicknesses, locations etc. the response of the instrument to the diffuse cosmic hard X-ray background and to the cosmic proton induced background have been calculated. As a result we present estimates of the background count rate expected in the low and high energy detector, and anti-coincidence rates. The effect of induced radioactivity in the detector and shielding materials and soft proton scattering in the mirror shells are also under study.

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