Import Geant4 11.0.0 source tree
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Gabriele Cosmo
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///\file "field/field02/.README.txt"
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///\brief Example field02 README page
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/*! \page Examplefield02 Example field02
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Test for investigation of tracking in electric field
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and field dependent electromagnetic processes.
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\section field02_s0 FIELD DEFINITION
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The field is a constant electric field.
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Technical note: in order to use any electric field, it is
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necessary to create the objects for its equation of motion,
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the stepper and driver for the integration, and the
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chord finder.
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The class that does these is F02ElectricFieldSetup. Its object
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is created in the ConstructSDandField() function in the F02DetectorConstruction
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class. The interactive commands are implemented in F02FieldMessenger.
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\section field02_s1 GEOMETRY DEFINITION
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The "Absorber" is a solid made of a given material.
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Three parameters define the absorber :
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- the material of the absorber,
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- the thickness of an absorber,
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- the transverse size of the absorber (the input face is a square).
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The volume "World" contains the "Absorber".
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In this test the parameters of the "World" can be changed , too.
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In addition a transverse uniform electric field can be applied.
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The default geometry is constructed in F02DetectorConstruction class,
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but all the parameters can be changed via
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the commands defined in the F02DetectorMessenger class.
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\section field02_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 are set in the F02PrimaryGeneratorAction class, and can
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be changed via the G4 build-in commands of G4ParticleGun class (see
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the macros provided with this example).
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It is also possible to change the position of the primary particle vertex
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or activate its randomization via the commands defined in the
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F01PrimaryGeneratorMessenger class.
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A RUN is a set of events.
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\section field02_s3 DETECTOR RESPONSE
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A HIT is a record, event per event , of all the
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informations needed to simulate and analyse the detector response.
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In this example a F02CalorHit is defined as a set of 2 informations:
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- the total energy deposit in the absorber,
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- the total tracklength of all charged particles in the absorber,
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Therefore the absorber is declared
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'sensitive detector' (SD), see F02CalorimeterSD, which means they can contribute to the hit.
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\section field02_s4 PHYSICS LIST
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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 the FTFP_BERT physics list. This physics list
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requires data files for electromagnetic and hadronic processes.
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See more on installation of the datasets in Geant4 Installation Guide,
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\section field02_s5 HOW TO START ?
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- Execute field02 in 'batch' mode from macro file e.g.
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\verbatim
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% ./field02 field02.in
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\endverbatim
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- Execute field02 in 'interactive' mode with visualization e.g.
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\verbatim
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% ./field02
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....
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Idle> /run/beamOn 1
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....
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\endverbatim
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*/
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@@ -0,0 +1,86 @@
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-------------------------------------------------------------------
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=========================================================
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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field02
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-------
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Test for investigation of tracking in electric field
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and field dependent electromagnetic processes.
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1- FIELD DEFINITION
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The field is a constant electric field.
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Technical note: in order to use any electric field, it is
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necessary to create the objects for its equation of motion,
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the stepper and driver for the integration, and the
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chord finder.
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The class that does these is F02ElectricFieldSetup. Its object
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is created in the ConstructSDandField() function in the F02DetectorConstruction
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class. The interactive commands are implemented in F02FieldMessenger.
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1- GEOMETRY DEFINITION
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The "Absorber" is a solid made of a given material.
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Three parameters define the absorber :
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- the material of the absorber,
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- the thickness of an absorber,
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- the transverse size of the absorber (the input face is a square).
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The volume "World" contains the "Absorber".
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In this test the parameters of the "World" can be changed , too.
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In addition a transverse uniform electric field can be applied.
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The default geometry is constructed in F02DetectorConstruction class,
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but all the parameters can be changed via
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the commands defined in the F02DetectorMessenger class.
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2- 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 are set in the F02PrimaryGeneratorAction class, and can
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be changed via the G4 build-in commands of G4ParticleGun class (see
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the macros provided with this example).
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It is also possible to change the position of the primary particle vertex
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or activate its randomization via the commands defined in the
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F01PrimaryGeneratorMessenger class.
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A RUN is a set of events.
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3- DETECTOR RESPONSE
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A HIT is a record, event per event , of all the
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informations needed to simulate and analyse the detector response.
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In this example a F02CalorHit is defined as a set of 2 informations:
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- the total energy deposit in the absorber,
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- the total tracklength of all charged particles in the absorber,
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Therefore the absorber is declared
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'sensitive detector' (SD), see F02CalorimeterSD, which means they can contribute to the hit.
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4- PHYSICS LIST
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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 the FTFP_BERT physics list. This physics list
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requires data files for electromagnetic and hadronic processes.
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See more on installation of the datasets in Geant4 Installation Guide,
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5- HOW TO START ?
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- Execute field02 in 'batch' mode from macro file e.g.
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% ./field02 field02.in
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- Execute field02 in 'interactive' mode with visualization e.g.
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% ./field02
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....
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Idle> /run/beamOn 1
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....
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