User Documentation and Examples (II) in GEANT p01

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1 User Documentation and Examples (II) in GEANT p01 Michael H. Kelsey SLAC National Accelerator Laboratory GEANT4 Tutorial, BUAF Puebla, Mexico 14 Jun 2010

2 Advanced User Documentation Toolkit developers manual For developers and users contributing to GEANT4 core Physics reference manual Documents models underlying particle and material interactions Extended GEANT4 Examples $G4INSTALL/examples/extended For testing and validation of GEANT4 Demonstrates tools and use of base classes Advanced GEANT4 Examples $G4INSTALL/examples/advanced Practical applications, several non-hep use cases Michael H. Kelsey GEANT4 June

3 Toolkit Developers Manual Object-oriented design and structure Class diagrams (some UML, some other) Philosophy behind design choices Guide to extending functionality Adding new solids Modifying the navigator Creating new fields or particle categories ForToolkitDeveloper/fo/BookForToolDev.pdf Michael H. Kelsey GEANT4 June

4 Physics Reference Manual A reference for users and developers Underlying physics of interactions Particle propagation, decay, collisions Material properties Theoretical formulations, models and parameterizations PhysicsReferenceManual/fo/PhysicsReferenceManual.pdf Michael H. Kelsey GEANT4 June

5 Extended Examples Testing and validation of processes and tracking Electromagnetic (TestEm0 - TestEm18) Field (field01 - field04) Geometry (olap) Demonstration of GEANT4 tools Analysis, event generators g3tog4, persistency (ROOT, GDML) Biasing (B01-B02), optical, run and event Extensions of GEANT4 Medical (DICOM files) Parallel computing (ParN02, ParN04) Michael H. Kelsey GEANT4 June

6 Optical Photons Michael H. Kelsey GEANT4 June

7 Gamma Therapy 50 MeV electrons incident on target produce gammas Charged particles removed from beam, gammas irradiate a water phantom Gamma beam properties are scored in check volume in front of phantom Scoring inside phantom to record radial radiation dose distribution Michael H. Kelsey GEANT4 June

8 Parallel Computing Introduction to parallel computing using TopC Parallelized version of novice example N02 Parallelized version of novice example N04 Parallelized version of brachytherapy advanced example Application can be run parallel or sequential Uses DIANE (DIstributed ANalysis Environment) Multithreaded examples using MPI Libraries Michael H. Kelsey GEANT4 June

9 DICOM Files GEANT4 interface reads DICOM files Information phantom geometry constructs Display with GEANT4 visualization Michael H. Kelsey GEANT4 June

10 GDML Example Sets up simple detector geometries GDML used to change geometries, detector aspects... without rebuilding application GDML schema supports Expressions, constants, units CSG + boolean solids Geometrical structure (volumes, rotations, translations) Materials Uses Xerxes-C XML parser (Linux only) Installation instructions included in example See also Geometry (III) talk, Wednesday 11:30 Michael H. Kelsey GEANT4 June

11 Advanced Examples HEP detectors CMS hadron calorimeter test beam ATLAS Forward Liquid Ar Calorimeter LHCb Rich test beam Neutron Shielding (TIARA) Medical (brachytherapy) Space applications Gamma ray telescope X-ray telescope X-ray fluorescence Underground physics (liquid Xe for dark matter) Michael H. Kelsey GEANT4 June

12 Brachytherapy Physics Low energy EM processes for e, γ Standard EM for e + Sensitive detector Soft tissue phantom Analysis Energy deposition n-tuple Primary energy spectra 1D, 2D histograms of energy deposition Michael H. Kelsey GEANT4 June

13 Gamma Ray Space Telescope Messengers to change geometry interactively Modular physics list Particle generator monochromatic or power law Tracker readout geometry Hit collections stored in ASCII file Simple digitization, read back hits collection to produce digi collections Michael H. Kelsey GEANT4 June

14 X-ray Telescope Simple model, for proton damage study Single shell nickel-gold mirror Two cones for paraboloid, two hyperboloid sections Aluminum baffle Carbon fiber tube, aluminum end caps Michael H. Kelsey GEANT4 June

15 X-ray Telescope Two main physics processes Multiple scattering of protons from mirror surfaces Electromagnetic (e +, e, γ) physics processes General particle source Many methods available to customize event generation Visualization of proton tracks AIDA interface for analysis Energy distribution histograms of protons reaching detector Michael H. Kelsey GEANT4 June

16 Underground Physics Realistic underground dark matter search Detailed geometry, including optional laboratory/cavern Physics Low energy, standard EM Optical processes Radioactive decay General particle source Macro files for various run conditions Michael H. Kelsey GEANT4 June

17 Radiation Protection Evaluate dose in interplanetary radiation environment In space vehicles In lunar surface habitats Calculate dose to water phantom due to Galactic cosmic rays Solar particle events Different shielding configurations available Inflatable sphere with water shielding Habitat buried in lunar soil Michael H. Kelsey GEANT4 June

18 Summary Toolkit Developers Guide For OO design and extension of toolkit Physics Reference Manual Reference to the underlying physics of GEANT4 Many extended examples Users Guide for Application Developers, Chapter 9.2 Code in CVS geant4/examples/extended 21 advanced examples Users Guide for Application Developers, Chapter 9.3 Code in CVS geant4/examples/advanced Michael H. Kelsey GEANT4 June

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