remsim radiation exposure and mission strategies for interplanetary manned missions susanna...
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REMSIMRadiation Exposure and Mission Strategies for Interplanetary Manned Missions
Susanna Guatelli,9th March 2004,Genova, Italy
www.ge.infn.it/geant4/space/remsim
Context
AURORA European programme for the exploration of the Solar System
The primary objective of Aurora is to create a European long-term plan for the robotic and human exploration of
the solar system, with Mars, the Moon and the asteroids as the most likely targets
Problem
The radiation hazard to crew is critical to the feasibility of interplanetary manned missions
To protect crew:• the shielding must be designed• the environment must be anticipated and monitored• a warning system must be put in place.
Because of the strong influence on the mission design and the vehicle/habitat designs, early study must be early study must be made.made.
REMSIM Project
Development of a Geant4 simulationGeant4 simulation for a preliminary quantitative study of – existing vehicle concepts and habitat designs– radiation exposure of crews therein
Collaboration– Geant4 Group, INFN Genova: S. Guatelli, M.G. Pia
– Alenia Spazio:
– ESA
G. Brambati, V. Guarnieri, C. Lobascio, P. Parodi
REMSIM objectives
Construct a geometrical description of the vehicle, habitat and astronaut to the required detail
Evaluation of the physical effects of space radiation in the exposed human body
A critical analysis of the Geant4 tools currently available for this type of studies, highlighting necessary extensions highlighting necessary extensions and improvements to the existing toolsand improvements to the existing tools
A first quantitative analysis of proposed shielding solutions
Software Process
The application follows a rigorous software process
Iterative-incremental method
Software Process artifacts• User Requirements Document • Analysis & Design• Implementation • Test • Project Management
- Risk List - Iteration Plan
- Project Tracking Summary
Configuration & Change Management
Solar flare electrons,protons, and heavy ions
Jovianelectrons
Solar flare neutronsand -rays
SolarX-rays
Galactic and extra-galacticcosmic rays
Induced emission
(Neutrinos)
Trapped particles
Anomalouscosmic rays
Analysis of interplanetary space mission
Significant radiation-GCR: p, alpha, C, O, Fe ions-SPE (p, alpha)
Irrelevant radiation- Jovian electrons-Trapped particles
Under study-Solar X-rays-Galactic X-rays and gamma-raysSolar Event electrons
Validation
Stopping Power for p and alpha
CSDA Range for p and alpha
Comparison with protocol reference data (Report ICRU 49)
Iterations
Implementation of the concept of vehicleImplementation of the concept of vehicle
Optimisation of the application Optimisation of the application (accuracy/performance)
GCR analysisGCR analysis
Explore Geant4 hadronic models
Experimental set-up
Future
• Benchmarks about Geant4 hadronic physics models
• Analysis of Solar Particle Events
• Dosimetric analysis in vehicle concepts
• Study of shieldings
Conclusion
REMSIM is an exotic dosimetric study
REMSIM is a valid application for a critical analysis of the Geant4 tools for interplanetary space manned mission studies
REMSIM has got the same problematics of radiotherapic disciplines (i.e. hadrontherapy, dosimetry studies in general)
REMSIM brings a valid contribution to the Geant4 medical physics applications