PhysicsLists_folger

PhysicsLists_folger - Cours Geant4 @ Paris 2007 4 au 8 juin...

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Unformatted text preview: Cours Geant4 @ Paris 2007 4 au 8 juin 2007, Ministère de la Recherche, Paris, France Gunter Folger • Introduction • Reference Physics lists – ConFgurations – Improvements • Physics lists from examples Physics List is a set of consistent physics models for each particle in application • Users need guidance or help • Geant4 offers starting points • Responsibility of application developer – To choose and, if needed, further develop – To validate for his use case • For EM physics, default set exists for standard EM – Low energy extensions • Hadronic models only valid for speci¡c energy range and speci¡c particles – High energy: string models vs. parameterized – Medium/low energy: parameterized, cascade model, precompound model, data driven neutron transport model – Stopping particles: CHIPS, parameterized, – Elastic scattering • Hadronic cross-sections • Optical photons • Neutrino physics • … • Nature is exact and fast • Simulation is attempt to approximate nature – Geant4 offers choice in level of approximation versus CPU performance (e.g. options for multiple scattering) • Not all physics is relevant in given simulation (e.g. neutrino physics) • Geant4 provides physics lists with source code – Reference Physics lists • Previously called ‘Educated Guess Physics Lists’ – Examples • Advanced examples • Novice and extended examples • Physics lists for speciFc communities, supported by SLAC – http://www.slac.stanford.edu/comp/physics/geant4/slac_physics_lists/G4_Physics_Lists.html • Wide choice of physics lists offered – more than 20 lists • Cover wide range of use cases • All lists cover all primary and secondary particles up to high energies (>TeV) • ‘Reference Physics lists’ – created starting 2002 by HP Wellisch as ‘Educated Guess Physics Lists’ • Problem domain oriented – Covering 14 fields from HEP calorimetry to medical to low background experiments – Offering 21 physics lists – Web based guidance – Structured, re-use of common parts •...
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This note was uploaded on 01/16/2012 for the course PHYSICS 392 taught by Professor Scholberg during the Fall '11 term at Duke.

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PhysicsLists_folger - Cours Geant4 @ Paris 2007 4 au 8 juin...

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