1. 1 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Space Radiation Environment

2. 2 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Introduction q Introduction q The Earth's magnetic field q Charged particle motion q The radiation belts  Description  South Atlantic Anomaly  Dynamics of the radiation belts  Models q The sources of energetic particles outside the magnetosphere  Solar flares  Cosmic rays  Magnetospheric shielding q Sensitivity of orbits to the radiations

3. 3 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Introduction shock

4. 4 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The Earth's magnetic field Dipolar magnetic field lines Dipolar magnetic field tilted and off-center with respect to Earth

5. 5 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The Earth's magnetic field 70° 80° 90° 80° 76° Earth's magnetic field, external component. Tsyganenko 1982 model Magnetic coordinates

6. 6 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Charged particle motion Lorentz force α FF (q,m) B V α: pitch angle Giration motion Larmor radius: Cyclotron period: Magnetic moment:

7. 7 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Charged particle motion B eq V α eq BmBm 90° αcαc * Mirror points Loss cone Bounce motion

8. 8 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Charged particle motion q<0 q>0 Drift motion

9. 9 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Charged particle motion Electron Proton Drift shell

10. 10 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Description

11. 11 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - description Proton radiation belt Electron radiation belt

12. 12 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - description LANL 1989-046 / 315-500 keV electron Drift shells 12 LT 24 LT 06 LT 18 LT GEO Local noon

13. 13 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - The South Atlantic Anomaly 9.4 MeV proton - 710 km - SAC-C/SPICA 460. keV electron - 710 km - SAC-C/SPICA

14. 14 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Dynamics of the radiation belts Atmospheric densities Cosmic neutrons Protons Solar cycle time scale

15. 15 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Dynamics of the radiation belts Electrons Solar cycle time scale

16. 16 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Dynamics of the radiation belts Electrons - Magnetic storm time scale 100 keV 12:00 00:00 18:00 06:00

17. 17 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Dynamics of the radiation belts Electrons - Magnetic storm time scale 500 keV 12:00 00:00 18:00 06:00

18. 18 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Models Static models - NASA AP8 AE8 E > 10 MeVE > 1 MeV

19. 19 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Models Static models - NOAA PRO & POLE NOAA PRO Year relative to solar maximum (keV -1 cm -2 s -1 ) POLE

20. 20 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Models Dynamic models - CRRESPRO & CRRESELE CRRES QUIET PROTON MODELCRRES ACTIVE PROTON MODEL

21. 21 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment The radiation belts - Models Comments

22. 22 Space technology course : Space Radiation Environment and its Effects on Spacecraft Components and Systems Space radiation environment Sensitivity of orbits to the radiations