20 September 1999Geant4 Workshop1 in Space : Examples of Past and Future Missions and Experiments P. Nieminen, ESA/ESTEC, The Netherlands

20 September 1999Geant4 Workshop2 ESA Space Environment & Effects Analysis Section in Space: Examples of Past and Future Missions and Experiments P. Nieminen, ESA/ESTEC, The Netherlands  Standard Radiation Environment Monitor (SREM)  Laser Interferometer Space Antenna (LISA)  Infrared Space Observatory (ISO)  X-ray surveys of asteroids and moons  Columbus Radiation Environment and Effects Package (CREEP)  Cellular & DNA damage: Astronaut safety

20 September 1999Geant4 Workshop3 Standard Radiation Environment Monitor (SREM) ESA Space Environment & Effects Analysis Section Optimised Al-Ta “Sandwich structure”. Aluminum Tantalum Silicon (detectors) D1 D2 Trade-off: - Performance - Cost - Mass - Volume e- (p+) e- Simulation outcome: modularity (D3) - Electrons > 0.5 MeV - Protons > 10 MeV - Heavy ions qualitatively Geant4: CAD-tool interface

20 September 1999Geant4 Workshop4 ESA Space Environment & Effects Analysis Section FIRST INTEGRAL PROBA CREEP onboard the ISS Mars Express Missions with SREM... …more to come.

20 September 1999Geant4 Workshop5 ESA Space Environment & Effects Analysis Section Laser Interferometer Space Antenna (LISA) Detection and observation of gravitational waves from massive black holes and galactic binary stars Small motions of free-floating test masses - Interferometer arm length ~5,000,000 km - Distance between two satellites at the same vertex km

20 September 1999Geant4 Workshop6 ESA Space Environment & Effects Analysis Section Laser Interferometer Space Antenna (LISA) 4 cm Gold-Platinum cubic test body : Charging by cosmic rays and solar particles and their secondaries  Analysis of charging by Geant3.21 down to 10 keV; interfacing with ITS3.0 down to 1 keV. [Y. Jafry et al., Class. Quantum Grav. 13, 1996]  Geant4: Analysis possible down to 250 eV p+,   -rays

20 September 1999Geant4 Workshop7 ESA Space Environment & Effects Analysis Section Infrared Space Observatory (ISO) ISOCAM detector images during quiet period (above) and during the solar event of (below) Courtesy M. Sauvage. ISOCAM PI is C. Cesarsky, CEA-Saclay M51

20 September 1999Geant4 Workshop8 ESA Space Environment & Effects Analysis Section Infrared Space Observatory (ISO)  Ray-tracing Monte Carlo simulations; comparison to glitch data  Part of the glitches due to ~4 MeV  - particles produced by 232 Th in the lens system Geant4: New powerful modules Sector Shielding Analysis Tool (SSAT) and Radioactive Decay Module (RDM) Glitch data Ray-tracing simulation

20 September 1999Geant4 Workshop9 ESA Space Environment & Effects Analysis Section X-Ray Surveys of Asteroids and Moons Induced X-ray line emission: indicator of target composition (~100  m surface layer) Cosmic rays, jovian electrons Geant3.21 ITS3.0, EGS4 Geant4 C, N, O line emissions included Solar X-rays, e, p Courtesy SOHO EIT

20 September 1999Geant4 Workshop10 ESA Space Environment & Effects Analysis Section Columbus Radiation Environment and Effects Package (CREEP) in TEF CREAX Dose-Depth Monitor Proton Monitor SREM

20 September 1999Geant4 Workshop11 ESA Space Environment & Effects Analysis Section Interactions of radiation with biological systems at cellular level  New Geant4-based activity in the ESA General Studies Programme  Heavy ions particularly harmful Astronaut safety, exobiology  C, Fe,...

20 September 1999Geant4 Workshop12 ESA Space Environment & Effects Analysis Section Conclusions Presentation by P.R. Truscott  is a new, powerful tool for a wide range of space radiation applications  Candidates for use: Integral, FIRST/PLANCK, STEP, XEUS, CPT, AMS,...  ESA-sponsored work on several space-specific modules completed or underway