REMSIM Radiation Exposure and Mission Strategies for Interplanetary Manned Missions Susanna Guatelli, 9 th March 2004, Genova, Italy .

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