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Galactic cosmic ray transport methods and radiation quality issues.
L W Townsend1, J W Wilson, F A Cucinotta
1NASA Langley Research Center, Hampton, VA 23665-5225.
International Journal of Radiation Applications and Instrumentation. Part D, Nuclear Tracks and Radiation Measurements
|January 1, 1992
Summary
This study details galactic cosmic ray (GCR) transport and shielding using the Langley Research Center code. It quantifies GCR dose equivalents and the impact of updated quality factors on radiation exposure.
Area of Science:
- Space physics
- Radiation protection
- Astroparticle physics
Background:
- Galactic cosmic rays (GCRs) pose a significant radiation hazard in space.
- Accurate modeling of GCR interactions is crucial for astronaut safety and mission planning.
Purpose of the Study:
- To present an overview of GCR interaction and transport methods used in the Langley Research Center GCR transport code.
- To quantify GCR dose equivalents and assess the impact of proposed quality factor changes on shielding requirements.
- To estimate the relative biological effectiveness (RBE) of mixed GCR fields.
Main Methods:
- Utilized the Langley Research Center GCR transport code for simulating GCR interactions.
- Calculated GCR dose equivalents in water for various aluminum shielding thicknesses.
- Applied the cellular track model of Katz to estimate RBE.
Main Results:
- Presented representative GCR dose equivalents for solar minimum conditions.
- Quantified the impact of proposed quality factor changes on exposure estimates and shielding needs.
- Provided RBE estimates for mixed GCR radiation fields.
Conclusions:
- The study provides a comprehensive analysis of GCR transport and shielding.
- Findings are essential for optimizing radiation protection strategies in space exploration.
- The research contributes to a better understanding of GCR biological effectiveness.