Modeling radiation loads to detectors in a SNAP mission
In order to investigate degradation of optical detectors of the Supernova Acceleration Project (SNAP) space mission due to irradiation, a three-dimensional model of the satellite has been developed. Realistic radiation environment at the satellite orbit, including both galactic and trapped in radiation belts cosmic rays, has been taken into account. The modeling has been performed with the MARS14 Monte Carlo code. In a current design, the main contribution to dose accumulated in the photodetectors is shown to be due to trapped protons. A contribution of primary {alpha}-particles is estimated. Predicted performance degradation for the photo-detector for a 4-year space mission is 40% and can be reduced further by means of shielding optimization.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 823659
- Report Number(s):
- FERMILAB-Conf-04/055-AD; TRN: US0401795
- Resource Relation:
- Conference: 10th International Conference on Radiation Shielding (ICRS-10), Funchal, Madeira (PT), 05/09/2004--05/10/2004; Other Information: PBD: 12 May 2004
- Country of Publication:
- United States
- Language:
- English
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