Geant4 User's Guide For Application Developers Examples

9.2.1 Extended Example Summary

• testing and validation of processes and tracking,
• demonstration of Geant4 tools, and
• extending the functionality of Geant4.

• Analysis

  • A01 - hit-scoring and histogramming using the AIDA interface
  • AnaEx01 - histogram and tuple manipulations using an AIDA compliant system
  
  

• Electromagnetic

  • TestEm0 - how to print cross-sections and stopping power used in input by the standard EM package
  • TestEm1 - how to count processes, activate/inactivate them and survey the range of charged particles. How to define a maximum step size
  • TestEm2 - shower development in an homogeneous material : longitudinal and lateral profiles
  • TestEm3 - shower development in a sampling calorimeter : collect energy deposited, survey energy flow and print stopping power
  • TestEm4 - 9 MeV point like photon source: plot spectrum of energy deposited in a single media
  • TestEm5 - how to study transmission, absorption and reflection of particles through a single, thin or thick, layer.
  • TestEm6 - physics list for rare, high energy, electromagnetic processes: gamma conversion and e+ annihilation into pair of muons
  • TestEm7 - how to produce a Bragg curve in water phantom. How to compute dose in tallies
  • TestEm8 - test of photo-absorption-ionisation model in thin absorbers, and transition radiation
  • TestEm9 - shower development in a crystal calorimeter; cut-per-region
  • TestEm10 - XTR transition radiation model, investigation of ionisation in thin absorbers
  • TestEm11 - how to plot a depth dose profile in a rectangular box
  • TestEm12 - how to plot a depth dose profile in spherical geometry : point like source
  • TestEm13 - how to compute cross sections of EM processes from rate of transmission coefficient
  • TestEm14 - how to compute cross sections of EM processes from direct evaluation of the mean-free path. How to plot final state
  • TestEm15 - compute and plot final state of Multiple Scattering as an isolated process
  • TestEm16 - simulation of synchrotron radiation
  • TestEm17 - check the cross sections of high energy muon processes
  
  

  TestEm by theme

  Check basic quantities
  Total cross sections, mean free paths ...	Em0, Em13, Em14
  Stopping power, particle range ...	Em0, Em1, Em5, Em11, Em12
  Final state : energy spectra, angular distributions	Em14
  Energy loss fluctuations	Em18
  Multiple Coulomb scattering
  as an isolated mechanism	Em15
  as a result of particle transport	Em5
  More global verifications
  Single layer: transmission, absorption, reflexion	Em5
  Bragg curve, tallies	Em7
  Depth dose distribution	Em11, Em12
  Shower shapes, Moliere radius	Em2
  Sampling calorimeters, energy flow	Em3
  Crystal calorimeters	Em9
  Other specialized programs
  High energy muon physics	Em17
  Other rare, high energy processes	Em6
  Synchrotron radiation	Em16
  Transition radiation	Em8
  Photo-absorption-ionization model	Em10

• Event Biasing

• Event Generator

  • HepMCEx01 - simplified collider detector using HepMC interface and stacking
  • HepMCEx02 - connecting primary particles in Geant4 with various event generators using the HepMC interface
  • MCTruth - demonstrating a mechanism for Monte Carlo truth handling using HepMC as the event record
  • exgps - illustrating the usage of the G4GeneralParticleSource utility
  
  

• Fields

  • BlineTracer - tracing and visualizing magnetic field lines
  • field01 - tracking using magnetic field and field-dependent processes
  • field02 - tracking using electric field and field-dependent processes
  • field03 - tracking in a magnetic field where field associated with selected logical volumes varies
  
  

• Geant3 to Geant4

  - converting simple geometries in Geant3.21 to their Geant4 equivalents
  
  

• Geometry Definition Markup Language

  - illustrating import and export of a detector geometry with GDML
  
  

• Geometry

  • OLAP - debugging tool for overlapping geometries
  
  

• Hadronic

  • Hadr01 - example based on the application IION developed for simulation of proton or ion beam interaction with a water target. Different aspects of beam target interaction are included.
  
  

• Medical Applications

  • DICOM - geometry set-up using the Geant4 interface to the DICOM image format
  • GammaTherapy - gamma radiation field formation in water phantom by electron beam hitting different targets
  • fanoCavity - ionization chamber test
  
  

• Optical Photons

  • LXe - optical photons in a liquid xenon scintillator
  
  

• Parallel Computing

  • ExDiane - example of a medical application run in a distributed environment using the DIANE framework
  • ParGeant4 - set of examples derived from 'novice' using parallelism at event level with the TopC application
  
  

• Persistency

  • PersEx01 - storing calorimeter hits using reflection mechanism with Root

• Polarisation

  • Pol01 - example of QED processes including polarization
  
  

• Radioactive Decay

  • exrdm - decays of radioactive isotopes as well as induced radioactivity resulted from nuclear interactions
  
  

• Run & Event

  • RE01

    - information between primary particles and hits and usage of user-information classes

  • RE02

    - simplified fixed target application for demonstration of primitive scorers
  
  

• Visualization

  • Examples of customisation for visualization