Charged-particle induced background expected in X-ray detecting CCDs in highly eccentric Earth orbits

Details Charged-particle induced background expected in X-ray detecting CCDs in highly eccentric Earth orbits Charged-particle induced background expected in X-ray detecting CCDs in highly eccentric Earth orbits

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993exa.....4..105d&link_type=abstract

Experimental astronomy, vol. 4, no. 2, p. 105-116

Physics

Optics

1

Background Radiation, Charge Coupled Devices, Charged Particles, Exosat Satellite, International Sun Earth Explorer 1, Radiation Effects, Satellite-Borne Instruments, X Ray Detectors, X Ray Optics, Earth Orbits, Eccentric Orbits, Monte Carlo Method, Radiation Belts, Satellite Orbits, Secondary Emission

Scientific paper

Charged particle fluxes on satellites in highly eccentric Earth orbits are studied, using data from International Sun-Earth Explorer 1 (ISEE1) and European X-ray Observatory Satellite (EXOSAT) missions. The effects of minimum-ionizing particles, low-energy electrons and secondary radiation produced by these particles on charged coupled devices (CCDs) used as X-ray detectors are identified. A technique to discriminate events caused by minimum-ionizing particles from X-ray events is proposed. The need for a deflecting system against low-energy electrons with focusing X-ray optics is demonstrated. An expected secondary radiation spectrum behind a typical detector shielding based on Monte-Carlo-simulations is presented. For the European Photon Imaging Camera (EPIC) detectors on X-ray Multi Mirror Mission (XMM), detection rates due to this radiation environment are estimated.

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