Gabriele Cosmo
104 lines
4.0 KiB
Plaintext
104 lines
4.0 KiB
Plaintext
-------------------------------------------------------------------
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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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TestEm10
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--------
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Test for investigation of transition radiation.
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Default setup for "TestEm10.in" and "TestEm10.large_N.in" is the simplified
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setup for ALICE XTR test beam (~2004), defined in DetectorSimpleALICE class.
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1- GEOMETRY DEFINITION
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The geometry setup includes "radiator" and "absorber" volumes
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of a box shape.
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The "radiator" material is defined as a mixture of a gas and foil material
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and the "absorber" contains a gas material.
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Several geometry setups are defined in the classes
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DetectorSetupX,
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where SetupX = ALICE06, Bari05, Barr90, Construction, Harris73, Messenger, SimpleALICE, Watase86
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The default setup, SimpleALICE, can be changed via UI command:
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/XTRdetector/setup setup
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where setup = simpleALICE, alice06, bari05, harris73, watase86, barr90
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2- 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 PrimaryGeneratorAction 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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3- DETECTOR RESPONSE
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In this example the total energy deposited in the "absorber" volume
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is accounted in SensitevDetector class, and a spectrum of XTR gamma
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particles, all secondary gamma particles and all secondary e-
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particleas is accounted in StackingAction class.
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4- 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.
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The trasition radiation process is defined in the
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TransitionRadiationPhysics builder.
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The transition radiator models can be changed simply with:
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Idle> /emphyslist/setXTRModel modelName
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See macro files "*.mac" for different setups providede with the example.
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5 - HISTOGRAMS
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Testem10 produces several histo which are saved as testem10.root by default.
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Content of these histo:
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1: Energy deposit in absorber
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2: XTR Gamma spectrum
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3: Secondary Gamma spectrum
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4: Secondary e- spectrum
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5: Energy deposit in absorber with the same histogram parameters
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as in the previous version of this example (Geant4 version <=10.2)
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The histograms are managed by G4AnalysisManager class and its Messenger.
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The histos can be individually activated with the command :
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/analysis/h1/set id nbBins valMin valMax unit
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where unit is the desired unit for the histo (MeV or keV, deg or mrad, etc..)
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One can control the name of the histograms file with the command:
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/analysis/setFileName name (default testem1)
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It is possible to choose the format of the histogram file : root (default),
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hdf5, xml, csv, by changing the default file type in HistoManager.cc
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It is also possible to print selected histograms on an ascii file:
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/analysis/h1/setAscii id
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All selected histos will be written on a file name.ascii (default testem1)
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6- HOW TO START ?
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- execute TestEm10 in 'batch' mode from macro files e.g.
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% TestEm10 TestEm10.in [TestEm10.large_N.in]
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- execute TestEm10 in 'interactive' mode with visualization e.g.
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% TestEm10
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....
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Idle> type your commands
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....
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7- MACROS
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alice06.mac: ALICE simplified 2006 test beam setup
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bari05.mac: setup of Bari INFN group (M. Bridgida et al, NIM A550 (2005) 157-168 (fig. 8))
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barr90.mac: NIM A294 (1990) 465-472 (fig. 11) setup
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harris73.mac: NIM 107 (1973) 413-422 (fig. 3b) setup
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salice.mac: ALICE simplified 2006 test beam setup with disabled
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ionisation and multiple scattering
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watase86.mac: NIM A248 (1986) 379-388 (fig. 7) setup
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