Gabriele Cosmo
95 lines
2.8 KiB
Plaintext
95 lines
2.8 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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Following Physics Lists can be activated via UI commands:
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/testem/phys/addPhysics standard
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/testem/phys/addPhysics g4v52
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/testem/phys/addPhysics penelope
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/testem/phys/addPhysics lowenergy
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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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To use histograms any of implementations of AIDA interfaces should
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be available (see http://aida.freehep.org).
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A package including AIDA and extended interfaces also using Python
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is PI, available from: http://cern.ch/pi .
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Once installed PI or PI-Lite in a specified local area $MYPI, it is
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required to add the installation path to $PATH, i.e. for example,
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for release 1.2.1 of PI:
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setenv PATH ${PATH}:$MYPI/1.2.1/app/releases/PI/PI_1_2_1/rh73_gcc32/bin
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CERN users can use the PATH to the LCG area on AFS.
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Before compilation of the example it is optimal to clean up old
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files:
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gmake histclean
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setenv G4ANALYSIS_USE 1
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gmake
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Before running the example the command should be issued:
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eval `aida-config --runtime csh`
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It is possible to choose the format of the output file with
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histograms using UI command:
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/testem/histoName type
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/testem/histoType type
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The following types are available: hbook, root, xml.
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