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Background of the Project

Background of the Project. Maria Grazia Pia, INFN Genova. http://www.ge.infn.it/geant4/dna. CERN, 26 July 2004. A project born from a fertile ground…. Geant4 An object oriented Toolkit for the simulation of the passage of particles trough matter Complementary activities

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Background of the Project

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  1. Background of the Project Maria Grazia Pia, INFN Genova http://www.ge.infn.it/geant4/dna CERN, 26 July 2004

  2. A project born from a fertile ground… • Geant4 • An object orientedToolkit for the simulation of the passage of particles trough matter • Complementary activities • Developments in Geant4 • Applications of Geant4 • Experimental measurements

  3. Object Oriented • The software technology adopted makes Geant4 a system open to extension, close to modification • New extensions do not affect the existing code at all • The system can evolve to accommodate • new requirements • new domains • new models and their implementations • new kinds of applications without perturbing the existing domains, implementations, applications… • Thanks to Geant4 design, it is easy to conceive • new geometries, new materials, new “particles” (cell, DNA…) • new processes (physical, chemical, bio-chemical, biological…) • new concepts not encompassed by Geant4 subsystems yet and to design and implement them in the existing architecture (well… easy does not mean by magic!)

  4. Toolkit • A toolkit is a system consisting of weakly coupled components • The user can use what he/she needs out of the toolkit, without worrying about what he/she does not need • Adding new components is easy • Communicate with other components through a well defined interface • Extending the functionality of Geant4 to cover new domains is facilitated by the Toolkit nature of Geant4 • Add new components • Need any extension/modification within existing components? • Are the current interfaces sufficient? complete?

  5. Experience in the group • Quantitative process measurements • Extension of Geant4 LowE electromagnetic package by re-engineering the whole Penelope physics (i.e. a whole Monte Carlo code) • 1 graduate student, with no background in OOP nor C++, working ~20% of his time alone at L’Aquila • Sound package design • 6 months from joining the Collaboration to public code release • Iterative and incremental process • First cycle provided full functionality through intermediate release steps • Photon process + Bremsstrahlung + positron annihilation + ionisation • Next design iteration: mix and match process components

  6. Geant4 Physics • A rich set of processes and models to handle the interactions of particles with matter • One of the most active areas of Geant4, still under development • Low Energy electromagnetic extensions • First general purpose Monte Carlo system to go below 1 keV • Precise dosimetry, applications in space science and bio-medical physics • Extensive test and validation • see Michela’s talk • Further extensions to lower energies to be explored • not easy! • how to validate them?

  7. Complementary activities • Geant4 Low Energy Electromagnetic Physics • Geant4 Test & Analysis Project • Geant4 physics testing • Statistical Toolkit • Medical applications: radiotherapy • Space science • Experimental activity in collaborating groups • Geant4-DNA

  8. Complementary activities: LowE Physics

  9. Complementary activities: Test & Analysis Project

  10. Complementary activities: physics validation More in Michela’s talk

  11. Complementary activities: Toolkit for statistical data analysis(comparison of distributions)

  12. Complementary activities: dosimetry for radiotherapy Catana Group, INFN LNS

  13. Complementary activities: REMSIM - radioprotection of astronauts

  14. Complementary activities: space environment generator interfaced to Geant4 New project, starting Susanna’s PhD Thesis

  15. Complementary activities • Experimental activities of Geant4 user groups • See talks by Sébastien Incerti, Gérard Montarou • Cellular irradiation at INFN Legnaro

  16. Profits of complementary experience and developments in other projects • Provides requirements to other projects

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