Gabriele Cosmo
68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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GAMMA THERAPY
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I.Gudovska, V.Ivanchenko, S.Larsson
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Karolinska Institute & Hospital, Stockholm, Sweden
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CERN, Geneva, Switzerland
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Electron beam of 50 MeV converted on target. All charged particles removed
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from the beam after the target. Gamma beam irradiate a water phantom.
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In front of the phantom a thin CheckVolume is placed to score gamma
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beam properties. Inside the phantom a score volume is placed to calculate
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radial radiation dose distribution.
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GEOMETRY
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GammaTherapy application geometry consists of along z:
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1. Generator of electrons directed along z-axis
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2. Target1 (Be, W)
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3. Target2 (W, Cu)
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4. GasVolume (He) all charged particles are killed inside
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5. CheckVolume (Air) is sensitive for scoring in front of thephantom
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6. Phantom (H2O) is sensitive for radioactive dose calculation
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7. Absorber in Phantom (H2O) is sensitive for transverse dose calculation
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World volume consists of Air.
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STEERING
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Geometry and other parameters can be defined by G4 UI commands.
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Following macro files are prepared for different targets used in the real
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setup: be.in (thin Be target), be_w.in (thick BeW target), cu_w.in (thick
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Cu W target).
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Only Physics Lists from physics_list kernal library can be activated.
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Corresponding UI commands are following
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/testem/phys/addPhysics emstandard
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/testem/phys/addPhysics emstandard_opt3
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/testem/phys/addPhysics empenelope
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/testem/phys/addPhysics emlivermore
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For interactive mode G4 visualization options and variables should be
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defined, then the example should be recompiled:
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gmake visclean
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gmake
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The vis.mac file can be used an example of visualization.
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HISTOGRAMS
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Built in histograms are provided. Name of output root file can be
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defined via UI command
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/testem/histoName <myName>
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