An Introduction to Geant4 - Nuclear Physics - University of Liverpool

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Extracting information from Geant • Two additional classes (minimum): – Sensitive Detector – Hit – (Event Action) is useful, but not essential • Which volumes are made sensitive is defined in the geometry class – At logical stage • Hit defines the object of an interaction – Energy deposit, Position, Interaction type, Detector segment • Hits will only be defined in sensitive detectors (not in passive volumes) • Hits are assigned their attributes (Energy, position) not in the hit class, but in the sensitive detector class Geometry Sensitive Detector Hit Output David Oxley An Introduction to Geant4
Compare C++ codes • Geometry: assigns a volume to be sensitive • Sensitive detector: – builds a Hit – assigns it to HitCollection • Hit class defines attributes of the hit • Sensitive Detector either: – outputs HitCollection – or sends HitCollection to EventAction file • EventAction: – necessary to process several HitCollections – examine several HitCollections, establish HitCollection David Oxley An Introduction to Geant4
Page 1 and 2: An Introduction to Geant4 David Oxl
Page 3 and 4: Where to go for help? Other users w
Page 5 and 6: Checking the geant4 setup • I pro
Page 7 and 8: Some Basics • Simplest Geant simu
Page 9 and 10: Defining your materials in C++ Defi
Page 11 and 12: Defining your world in C++ • Defi
Page 13 and 14: Summary: Geometry Solid Volume Shap
Page 15 and 16: Primary Generator Action • Genera
Page 17 and 18: Physics List: Cuts • Cut value de
Page 19 and 20: • Visualize Run an example
Page 21: Running a useful geant4 simulation
Page 25 and 26: Analysing the output • Build root

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