Solar particle event dose distributions: Parameterization of dose-time profiles

Calculations of total dose and dose equivalent as a function of time since the start of the event are presented for four of the major solar particle events that occurred during the period from August to December 1989. Results are presented for exposures to the skin, ocular lens and bone marrow shiel...

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Bibliographic Details
Published in:Acta astronautica 1998-08, Vol.43 (3), p.249-259
Main Authors: Zapp, E.Neal, Ramsey, Chester R., Townsend, Lawrence W., Badhwar, Gautam D.
Format: Article
Language:English
Subjects:
Aerospace Medicine
Astronauts
Bone Marrow - radiation effects
Computer Simulation
Humans
Least-Squares Analysis
Lens, Crystalline - radiation effects
Models, Biological
Phantoms, Imaging
Protons
Radiation Dosage
Radiation Protection - statistics & numerical data
Risk Assessment
Seasons
Skin - radiation effects
Solar Activity
Space Flight
Time Factors
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Summary:Calculations of total dose and dose equivalent as a function of time since the start of the event are presented for four of the major solar particle events that occurred during the period from August to December 1989. Results are presented for exposures to the skin, ocular lens and bone marrow shielded by a nominal thickness of aluminum shielding, comparable to that provided by a spacesuit. The calculated curves of organ dose and dose equivalent versus time are parameterized using a Weibull functional form for the fitting equation. The fitting parameters are determined using least squares regression techniques. These results provide a useful starting point for the development of methods to predict the cumulative doses and times to reach various dose limits from a limited number of dose measurements early in a solar particle event.
ISSN:0094-5765
1879-2030
DOI:10.1016/S0094-5765(98)00158-1