Radiation Modeling and Shielding for Human Spaceflight
Integrated simulation of active and passive radiation protection systems for long-duration human spaceflight missions.
Space radiation is a mission-limiting hazard for exploration beyond low Earth orbit. Galactic Cosmic Rays (GCR) and Solar Particle Events (SPE) expose crews to chronic and acute radiation doses that exceed current allowable limits for Mars-class missions.
Our research develops computational models to evaluate radiation protection systems by linking physical shielding mechanisms to biological dose outcomes. The objective is to enable quantitative trade studies across shielding architectures, mission profiles, and operational constraints.
We develop a coupled simulation framework that integrates active electromagnetic shielding with passive material-based protection into a single, physics-consistent pipeline.
- Active shielding: electromagnetic field generation and charged-particle trajectory simulation
- Passive shielding: deterministic radiation transport through material stack-ups
- Dose estimation: calculation of absorbed dose and biologically weighted dose equivalent
The framework couples finite-element electromagnetic modeling with deterministic particle transport, enabling end-to-end simulation from deep-space radiation environment to tissue-level dose.
Coupled simulation pipeline linking electromagnetic field generation, particle transport, and dose-equivalent estimation.
The simulation resolves the full radiation interaction chain:
- Generation of electromagnetic fields for candidate shielding architectures
- Particle propagation under Lorentz forces in complex 3D geometries
- Conversion of particle flux into boundary conditions for transport modeling
- Deterministic transport through materials to compute dose and dose equivalent
This approach addresses a key limitation in existing work, where active and passive shielding are often modeled independently rather than as a coupled system.
The framework is validated against analytical electromagnetic solutions and published radiation transport benchmarks.
Electromagnetic field solutions demonstrate agreement with analytical models to within 0.2%, while coupled active–passive simulations show consistent agreement with published shielding studies across a range of field strengths and material configurations.
Example simulation results showing dose-equivalent reduction as a function of shielding configuration and thickness.
The modeling framework is used to evaluate radiation protection architectures across key design variables:
- Shielding configuration (dipole, toroid, solenoid, electrostatic)
- Material selection and thickness
- System mass and power requirements
Multi-objective optimization is applied to identify Pareto-optimal solutions that balance dose reduction against mass and power constraints, enabling systematic comparison of candidate architectures.
Trade space illustrating the relationship between radiation dose, system mass, and power for candidate shielding architectures.
The resulting models are applied to design reference missions to evaluate radiation exposure under realistic deep-space conditions, including solar cycle variability and extreme solar particle events.
- Assessment of crew dose over Mars-class missions
- Comparison of shielding architectures under GCR and SPE conditions
- Integration of mass and power constraints into mission design
This work enables physics-based evaluation of integrated radiation protection systems, supporting the design of feasible shielding architectures for long-duration human exploration missions. The framework provides a tool for translating radiation physics into actionable engineering trade-offs for spacecraft design.