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E. Daly, R. Nartallo, P. Nieminen

Recent, undergoing and planned ESA-supported activities concerning development, use and promotion of the Geant4 toolkit. E. Daly, R. Nartallo, P. Nieminen. In-house and external developments.

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E. Daly, R. Nartallo, P. Nieminen

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  1. Recent, undergoing and planned ESA-supported activities concerning development, use and promotion of the Geant4 toolkit E. Daly, R. Nartallo, P. Nieminen Geant4 Workshop, INFN Genova

  2. In-house and external developments • Continuing, detailed development of the XMM-Newton model in Geant4 and the related radiation environment analysis • Support to the secondary radiation analysis of the OMI instrument onboard the NASA Earth Observing System (EOS) Aura mission • ESA (SCI-SA) : Students at INFN Genova in the frame of the proposed MXS instrument onboard the Bepi Colombo mission to Mercury • Contact with CNES and ONERA (F) where Geant4 is actively used for microdosimetry. (Adjoint methods?) • Transfer of the INTEGRAL mass model into Geant4 by Univ. Southampton. Utilised also by NASA Goddard Space Center Geant4 Workshop, INFN Genova

  3. External ESA contracts • INFN Genova: Development, implementation and use low-energy Geant4 software modules • DERA: Maintenance of the Geant4 Space Modules • DERA, SIRA and University of Southampton: Radiation Effects and Analysis Tools (REAT). Interface to Spenvis space environment package; potentially event biasing techniques • INFN Genova: User requirements for the simulation of the radiation effects in biological systems at the cellular and DNA level • University of Bern: ESA Standard Radiation Environment Monitor (SREM) and SONTRAC neutron monitor simulations Geant4 Workshop, INFN Genova

  4. Soon coming & in preparation • Two-year (minimum) programme to simulate the radiation fluxes and doses inside the Columbus module of the International Space Station using Geant4 • An open-competition R&D item, with 400 kEURO funds for Geant4 developments, especially for space science missions • Support for the development of the internal conversion process • INTAS project, in which 11 Russian scientists will work together with experts from ESA and elsewhere on issues related to radiation environment and effects. Also includes Geant4 • University of Cologne: Development of software for simulation of Non-Ionising Energy Loss (NIEL) • SpaceGRID, WP on Geant4 MC simulations Geant4 Workshop, INFN Genova

  5. Geant4 Promotion • XMM Radiation Environment Workshop at Vilspa, Spain, November-December 2000 • ISO Calibration Workshop at Vilspa, Spain, February 2001. • Spacecraft Charging Technology Conference at ESTEC, The Netherlands, April 2001 • Round Table on the 21st Century Monte Carlo Methods for Space Applications at ESTEC, The Netherlands, June 2001 • Eurosim 2001 at TU Delft, The Netherlands, June 2001 • 2001 IEEE Nuclear and Space Radiation Effects Conference (NSREC) in Vancouver, Canada, July 2001 Geant4 Workshop, INFN Genova

  6. ESA Space Environment & Effects Analysis Section INTEGRAL Geant4 Workshop, INFN Genova

  7. OMI - A shielding problem • 5-year mission • Polar orbit • CCD detector • Radiation environment  NIEL • 40 – 70mm shield • Al, other? • SPENVIS  OK with protons • Secondary particles problem? Geant4 Workshop, INFN Genova

  8. OMI • Spherical geometry • Si disk • 50mm thick Al sphere • Proton spectrum from SPENVIS • Isotropic proton distribution using GPS Geant4 Workshop, INFN Genova

  9. XMM-Newton • Launched in December 1999, highly elliptical orbit through radiation belts • Similar design and orbit to Chandra, launched in July 1999 • Study prompted by severe degradation of Chandra’s CCDs • Cause of degradation  low-energy protons Geant4 Workshop, INFN Genova

  10. XMM-Newton - Geant4 geometry Geant4 Workshop, INFN Genova

  11. Simulation output Full trajectory of particles that reach the detector including: • Type of particle • Initial energy and position • Energy and position at all scattering points • Final energy and position Geant4 Workshop, INFN Genova

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