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2nd International Simbol-X Symposium, Paris : France (2008)
The Simbol-X Anticoincidence
J. Chabaud1, P. Laurent1, 2, S. Colonges1, J. Barbay1, J.-P. Baronick1, M. Benallou1, P. Ferrando1, 2, M. Gilliot1, J.-J. Jaeger1, M. Nicolas1, E. Ollivier1, J. Waisbard1, B. Yoffo1
SIMBOL-X Collaboration(s)

The Simbol-X telescope will be constitued by two satellites in formation flight. One will host the mirror module and the other the detector payload. This payload will be built with two main detectors able to measure the position, energy and arrival time of each focused photon, between 0.5 and 80 keV. The high sensitivity required by Simbol-X will necessitate low noise background detectors. To achieve this goal, those detectors will be surrounded by a passive graded shield, aimed to stop the out of field of view photons, and an active anticoïncidence system to tag the passing particles. This anticoïncidence detector, whose conception, optimisation and realization are under responsibility of the APC Laboratory, Paris, is based on plastic scintillator plates associated to multi-anodes photo-multipliers via optical fibers. In this paper, we will present the present status of the anticoïncidence system and its expected performances.
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
2 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie

Physique/Astrophysique/Phénomènes cosmiques de haute energie
X- and gamma-ray telescopes and instrumentation – Photomultipliers – phototubes and photocathodes – Neutrino – muon – pion – and other elementary particles – cosmic rays – Imaging detectors and sensors