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Solar particle event dose distributions: parameterization of dose-time profiles
E N Zapp1, C R Ramsey, L W Townsend
1Department of Nuclear Engineering, The University of Tennessee, Knoxville 37996-2300, USA.
This study models radiation doses from solar particle events in 1989. It provides a method to predict cumulative radiation doses for astronauts based on early measurements.
Area of Science:
- Space physics
- Radiation dosimetry
Background:
- Major solar particle events (SPEs) pose significant radiation risks to astronauts.
- Accurate dose assessment is crucial for crewed space missions.
Purpose of the Study:
- To calculate total dose and dose equivalent over time for key organs during SPEs.
- To develop predictive models for astronaut radiation exposure.
Main Methods:
- Analysis of four major SPEs from August-December 1989.
- Dose calculations for skin, ocular lens, and bone marrow with spacesuit-equivalent aluminum shielding.
- Parameterization of dose-time curves using a Weibull function and least squares regression.
Main Results:
- Dose and dose equivalent as a function of time were calculated for shielded organs.
- Weibull function parameters were determined for fitting the dose-time data.
- The study provides a framework for predicting cumulative doses from early measurements.
Conclusions:
- The developed models offer a practical approach to estimate radiation exposure during SPEs.
- These findings support the development of radiation protection strategies for long-duration spaceflight.
- Predictive capabilities can aid in managing astronaut health risks from solar events.
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