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Development of Germanium Detector Simulations with the Geant 4 Toolkit

Development of Germanium Detector Simulations with the Geant 4 Toolkit. Andrew Mather arm@ns.ph.liv.ac.uk. 12th UK Postgraduate Nuclear Physics Summer School St. Andrews September 1st - 14th 2003. Presentation Overview. Geant 4 – Introduction Geant 4 – Simulation Structure

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Development of Germanium Detector Simulations with the Geant 4 Toolkit

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  1. Development of Germanium Detector Simulations with the Geant 4 Toolkit Andrew Mather arm@ns.ph.liv.ac.uk 12th UK Postgraduate Nuclear Physics Summer School St. Andrews September 1st - 14th 2003

  2. Presentation Overview • Geant 4 – Introduction • Geant 4 – Simulation Structure • Why use Simulations • HP Germanium Detectors Simulated • Results • Conclusion

  3. Geant 4 - Introduction • Developed at Cern by HEP. • Based on Object Orientated Architecture, Using C++ • Used in HEP, Nuclear, Medical and Accelerator Physics. • Fully open source, extremely flexible and extendable due to OO nature.

  4. Geant 4 – Simulation Structure

  5. Why use Simulations • Back-up (or otherwise!) experimental observations. • Ability to retrieve information not accessible from real detectors. (e.g. exact position and interaction type of gamma-ray interactions) • Can produce higher statistics for certain results. • Help decide properties that will yield best experimental results before commencing the experiment. • Cost and time saving, giving information that would not have been feasible to measure experimentally.

  6. HP Germanium Detectors Simulated Tigre GMX45PAS (All sizes in mm)

  7. Results – “GMX45PAS” * MCNP and Penelope results courtesy of Mark Ibison

  8. Results – “Tigre”

  9. Results – Multiplicity 122 Kev

  10. Results – Multiplicity 1408 Kev

  11. Results – Spectra Simulation Vs Exp

  12. Results – First Interaction

  13. Results – 511 Kev 1st 2nd 3rd interaction

  14. Results – Event ID

  15. Results – Doppler Broadening

  16. Conclusion • Simulations have produced resultsmostlyin agreement with experiment. • Produced some interesting results to be followed up experimentally in the future. (Tigre Hit-Patterns and Multiplicity data) • Greater understanding from retrieved data normally lost or hard to measure in experiments.

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