Mathematics – Logic
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm41a0336m&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM41A-0336
Mathematics
Logic
7914 Engineering For Hazard Mitigation, 7934 Impacts On Technological Systems, 7959 Models, 7984 Space Radiation Environment
Scientific paper
A variety of static electron radiation belt models, space environment prediction tools, and energetic electron datasets are used by spacecraft designers and operations support personnel as internal charging code inputs. These inputs are used to evaluate electrostatic discharge risks in space systems due to exposure to relativistic electron environments. Evaluating the environments inputs is often accomplished by comparing whether the data set or forecast tool reliability predicts the measured electron flux (or fluence over a given period) for some chosen period. While this technique is useful as a model metric, it does not provide the information necessary to evaluate whether short term deviances of the predicted flux is important in the charging evaluations. In this paper, we use a 1-D internal charging model to compute electric fields generated in insulating materials as a function of time when exposed to relativistic electrons in the Earth's magnetosphere. The resulting fields are assumed to represent the 'true' electric fields and are compared with electric field values computed from relativistic electron environments derived form a variety of space environment and forecast tools. Deviances in predicted fields compared to the 'true' fields which depend on insulator charging time constants will evaluated as a potential metric for determining the importance of predicted and measured relativistic electron flux deviations over a range of time scales.
Coffey Victoria Newman
Garrett Henry Berry
Jun Insoo
Minow Joseph I.
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