A spacecraft shielding model for calculating exposures to radiation

Area of Science:

• Spacecraft engineering
• Radiation physics

Background:

• Accurate calculation of radiation exposure is critical for spacecraft design and crew safety.
• Previous models often simplified the complex, inhomogeneous nature of spacecraft shielding materials.

Purpose of the Study:

• To propose a novel spacecraft shielding model.
• To account for the randomly inhomogeneous distribution of material thickness within spacecraft.

Main Methods:

• Developed a model based on the concept of random material thickness inhomogeneity.
• Derived a shielding function dependent on mean density, geometry, and shielding function dispersion-to-mean ratio.
• Validated the model using data from Soviet and U.S.A. spacecraft, including the Space Shuttle.

Main Results:

• The proposed model provides a method to calculate radiation exposure at any point within a spacecraft.
• The shielding function's mean density, geometry, and dispersion-to-mean ratio are key parameters.
• The model's effectiveness was confirmed through verification with real spacecraft data.

Conclusions:

• The randomly inhomogeneous character of shielding is a crucial factor in radiation exposure calculations.
• The developed model offers a more accurate and versatile approach to spacecraft radiation shielding analysis.
• This model can be applied to various spacecraft designs for improved radiation safety assessments.