4 th GEANT4 Space Users’ Workshop and 3 rd Spenvis Users’ Workshop Pasadena – CA

1. GEANT4 Validation Model for Radiation Shielding of Advanced Data and Power Management Systems (ADPMS) Housing F. Garcia1, K. Kurvinen1, T. Brander2, R. Orava1, J. Heino1, A. Virtanen3, H. Kettunen3, M. Tenhunen4 1Department of Physcal Sciences, Helsinki Institute of Physics and University of Helsinki, Helsinki, Finland2Laboratory of Lightweight Structures, Helsinki University of Technology, Helsinki, Finland3Department of Physics, University of Jyväskylä, Jyväskylä, Finland4Cancer Disease clinic, Helsinki University Central Hospital, Helsinki, Finland 4th GEANT4 Space Users’ Workshop and 3rd Spenvis Users’ Workshop Pasadena – CA Nov. 6 - 10, 2006

2. Outline • INTRODUCTION • HOUSING LAMINATE STRUCTURE • IRRADIATION with PROTONS and ELECTRONS • GEANT4 VALIDATION and SIMULATIONS • CONCLUSIONS 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 2

3. Introduction The Laboratory of Lightweight Structures @ HUT Thermal Analysis Mechanical Analysis 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 3

4. Housing Laminate Structure Thermal Conductivity Laminate: CFRP (K1100/RS-3C) – 1 mm Wolfram – 50 m CFRP (K1100/RS-3C)– 1 mm Structure Material Laminate: CFRP (M40J/RS-3C) – 1 mm Wolfram – 50 m CFRP (M40J/RS-3C)– 1 mm CFRP – 1 mm Wolfram – 50 m CFRP – 1 mm 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 4

5. Structures in Study Type of Laminates 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 5

6. Irradiation with Protons and Electrons Proton irradiation Electron irradiation 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 6

7. Proton beam on Aluminium laminate GEANT4 Validation – protons 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 7

8. Proton beam on CFRP laminate GEANT4 Validation – protons 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 8

9. GEANT4 Simulations – electrons Electron beam on water Phantom 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 9

10. GEANT4 Simulations – electrons 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 10

11. Comparison of the Simulations – GEANT4 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 11

12. Conclusions • The Attenuation efficiency for several laminates of CFRP with wolfram layer was measured • The validation of the Monte Carlo – GEANT4 model was successfully carried out. • The Basis for future simulations was set up in the Computer Cluster at Kumpula • The GEANT4 simulated proton transmission for the CFRP with wolfram layer and Aluminium both with the same areal mass indicates that saving mass could be achieved 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 12

13. Acknowledgement • ESA contract no. 18977/05/NL/PA • TEKES – Finnish Founding Agency for Technology and Innovation • Accelerator Laboratory of the University of Jyväskylä - RADEF facility • Helsinki University Central Hospital - Meilahti hospital, Department of Oncology 05-Nov-06 GEANT4 Space and Spenvis Users’ Worshop 2006 – Session II F. García 13