Modeling radiation loads to detectors in a SNAP mission

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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 ... continued below

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169 Kilobytes pages

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al., Nikolai V. Mokhov et May 12, 2004.

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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.

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169 Kilobytes pages

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  • 10th International Conference on Radiation Shielding (ICRS-10), Funchal, Madeira (PT), 05/09/2004--05/10/2004

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  • Report No.: FERMILAB-Conf-04/055-AD
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 823659
  • Archival Resource Key: ark:/67531/metadc782903

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  • May 12, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 5, 2016, 3:32 p.m.

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al., Nikolai V. Mokhov et. Modeling radiation loads to detectors in a SNAP mission, article, May 12, 2004; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc782903/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.