Gabriele Cosmo
93 lines
2.7 KiB
Plaintext
93 lines
2.7 KiB
Plaintext
//$Id$
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///\file "electromagnetic/TestEm8/.README"
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///\brief Example TestEm8 README page
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/*! \page ExampleTestEm8 Example TestEm8
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Example for investigation of ionisation in thin absorbers and gaseous
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detectors
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\section TestEm8_s1 GEOMETRY DEFINITION
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The target is a cilinder made of a given material placed inside
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cilindrical container, which is placed inside the world volume.
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Following parameters define the geometry:
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- the material of the target,
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- the thickness of the target,
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- the radius of the target,
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- the material of the container,
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- the thickness of the container,
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- the material of the world.
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The list of materials used in gaseous detectors are built inside
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the DetectorConstruction class, also NIST materials are availabe.
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The default geometry is provided but all parameters can be changed via
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UI commands defined in the DetectorMessenger class, for example,
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\verbatim
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/testem/setGasMat XeCH4C3H8
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/testem/setWindowMat G4_MYLAR
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/testem/setWorldMat G4_AIR
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/testem/setGasThick 10 cm
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/testem/setGasRad 20 cm
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/testem/setWindowThick 50 um
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\endverbatim
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\section TestEm8_s2 AN EVENT : THE PRIMARY GENERATOR
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The primary kinematic consists of a single particle which hits the
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absorber perpendicular to the input face. The type of the particle
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and its energy can be set via the G4 build-in commands of G4ParticleGun
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A RUN is a set of events.
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\section TestEm8_s3 DETECTOR RESPONSE
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The TargetSD class sending information about each step inside the target
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to the HistoManager class scoring of energy deposition in the detector.
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Additionally at each step of a particle inside the target the number of
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ionisation clusters is sampled using G4ElectronIonPair helper class. The
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parameter of transformation of energy into ionisation clusters can be
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set via UI command:
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\verbatim
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/testem/setPairEnergy 19 eV
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\endverbatim
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\section TestEm8_s4 PHYSICS
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The particle's type and the physic processes which will be available
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in this example are set in PhysicsList class, which uses Geant4
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EM physics constructors providing in the physics_list library.
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The PhysicsListMessenger classes introduce interactive commands. In particular,
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PAI ionisation model can be added using G4EmConfurator helper class,
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which is invokated by the UI command
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\verbatim
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/testem/phys/addPhysics pai
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\endverbatim
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\section TestEm8_s5- HOW TO START ?
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- Execute TestEm8 in 'batch' mode from macro files e.g.
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\verbatim
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% $(G4INSTALL)/bin/$(G4SYSTEM)/TestEm8 TestEm8.in
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\endverbatim
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- Execute TestEm8 in 'interactive' mode with visualization e.g.
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\verbatim
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% $(G4INSTALL)/bin/$(G4SYSTEM)/TestEm8
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....
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Idle> type your commands
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....
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\endverbatim
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*/
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