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Development and application of a 3-D geometry/mass model for LDEF satellite ionizing radiation assessmentsA computer model of the three dimensional geometry and material distributions for the LDEF spacecraft, experiment trays, and, for selected trays, the components of experiments within a tray was developed for use in ionizing radiation assessments. The model is being applied to provide 3-D shielding distributions around radiation dosimeters to aid in data interpretation, particularly in assessing the directional properties of the radiation exposure. Also, the model has been interfaced with radiation transport codes for 3-D dosimetry response predictions and for calculations related to determining the accuracy of trapped proton and cosmic ray environment models. The methodology is described used in developing the 3-D LDEF model and the level of detail incorporated. Currently, the trays modeled in detail are F2, F8, and H12 and H3. Applications of the model which are discussed include the 3-D shielding distributions around various dosimeters, the influence of shielding on dosimetry responses, and comparisons of dose predictions based on the present 3-D model vs those from 1-D geometry model approximations used in initial estimates.
Document ID
19920017993
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Colborn, B. L.
(Science Applications International Corp. Prospect, TN, United States)
Armstrong, T. W.
(Science Applications International Corp. Prospect, TN, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1992
Publication Information
Publication: NASA. Langley Research Center, Second LDEF Post-Retrieval Symposium Abstracts
Subject Category
Atomic And Molecular Physics
Accession Number
92N27236
Funding Number(s)
CONTRACT_GRANT: NAS8-38566
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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