1. GEANT4 Validation Model for Radiation Shielding of Advanced Data and Power Management Systems (ADPMS) Housing 4 th GEANT4 Space Users Workshop and 3 rd Spenvis Users Workshop Pasadena – CA Nov. 6 - 10, 2006 F. Garcia, K. Kurvinen, T. Brander, R. Orava, J. Heino, A. Virtanen, H. Kettunen, M. Tenhunen F. Garcia 1, K. Kurvinen 1, T. Brander 2, R. Orava 1, J. Heino 1, A. Virtanen 3, H. Kettunen 3, M. Tenhunen 4 1 Department of Physcal Sciences, Helsinki Institute of Physics and University of Helsinki, Helsinki, Finland 2 Laboratory of Lightweight Structures, Helsinki University of Technology, Helsinki, Finland 3 Department of Physics, University of Jyväskylä, Jyväskylä, Finland 4 Cancer Disease clinic, Helsinki University Central Hospital, Helsinki, Finland

2. Advance Data and Power Management Systems (ADPMS) Housing Outline INTRODUCTION INTRODUCTION HOUSING LAMINATE STRUCTURE HOUSING LAMINATE STRUCTURE IRRADIATION with PROTONS and ELECTRONS IRRADIATION with PROTONS and ELECTRONS GEANT4 VALIDATION and SIMULATIONS GEANT4 VALIDATION and SIMULATIONS CONCLUSIONS CONCLUSIONS 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 2

3. Advance Data and Power Management Systems (ADPMS) Housing 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. Advance Data and Power Management Systems (ADPMS) Housing 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. Advance Data and Power Management Systems (ADPMS) Housing Type of Laminates Laminate Type Configuration L1 CFRP (M40J/RS-3C) – 1 mm Wolfram – 50 m CFRP (M40J/RS-3C) – 1 mm L2 CFRP (ASA/3501-6) – 1 mm Wolfram – 50 m CFRP (ASA/3501-6) – 1 mm L3 CFRP (ASA/3501-6) – 1 mm Wolfram – 2 x 50 m CFRP (ASA/3501-6) – 1 mm L4 CFRP (ASA/3501-6) – 0.65 mm Wolfram – 50 m CFRP (ASA/3501-6) – 1.3 mm Structures in Study 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 5

6. Advance Data and Power Management Systems (ADPMS) Housing Irradiation with Protons and Electrons Proton irradiationElectron irradiation 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 6

7. Advance Data and Power Management Systems (ADPMS) Housing GEANT4 Validation – protons Proton beam on Aluminium laminate 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 7

8. Advance Data and Power Management Systems (ADPMS) Housing GEANT4 Validation – protons Proton beam on CFRP laminate 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 8

9. Advance Data and Power Management Systems (ADPMS) Housing GEANT4 Simulations – electrons Electron beam on water Phantom 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 9

10. Advance Data and Power Management Systems (ADPMS) Housing GEANT4 Simulations – electrons 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 10

11. Advance Data and Power Management Systems (ADPMS) Housing Comparison of the Simulations – GEANT4 05-Nov-06 GEANT4 Space and Spenvis Users Worshop 2006 – Session II F. García 11

12. Advance Data and Power Management Systems (ADPMS) Housing 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. Advance Data and Power Management Systems (ADPMS) Housing 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