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Practice GEANT4 - ML2. Dr. C. Andenna DIPIA – ISPESL e Gruppo Collegato Sanità INFN (Roma) [email protected] [email protected]. Geant4 School, 12-14 October 2009, Catania Italy. Some aspects of the program. / primaryParticleData / idParticleSource 1 - PowerPoint PPT Presentation
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Practice GEANT4 - ML2
Geant4 School, 12-14 October 2009, Catania Italy
Dr. C. Andenna
DIPIA – ISPESL e Gruppo Collegato Sanità INFN (Roma)
[email protected]@iss.infn.it
Geant4 Low Energy Electromagnetic Physics Working Group
Some aspects of the program
/primaryParticleData/idParticleSource 1
switch (this->idCurrentParticleSource){case idParticleSource_Random:
this->GenerateFromRandom();break;
case idParticleSource_CalculatedPhaseSpace:this->GenerateFromCalculatedPhaseSpace();break;
}
2Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Some aspects of the program
/primaryParticleData/idParticleSource 2switch (this->idCurrentParticleSource)
{case idParticleSource_Random:this->GenerateFromRandom();break;case idParticleSource_CalculatedPhaseSpace:this->GenerateFromCalculatedPhaseSpace();break;
}
3Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Some aspects of the program Dose calculation and its standard deviationIn each voxel:
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111
2
2222
2
NNN
d
d
NN
dNd
NN
dd
N
dd
N
iiN
ii
N
iiN
i
id
N
ii
11
22
2
2
22
N
DND
N
ddN
N
dDdD
N
ii
N
ii
dD
N
ii
N
ii
Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Some aspects of the program
Dose calculation:
G4double depEnergy= aStep->GetTotalEnergyDeposit(); voxelMass=density*voxels.halfSize.X*voxels.halfSize.Y*voxels.h
alfSize.Z; dose=depEnergy/voxelMass; Voxels.nEvents++; voxels.depEnergy+=dose; voxels.depEnergy2+=dose*dose;
5Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Content
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An overview of the results
Phase space data Phantom voxelization Comparison between experimental and calculated
doses Graphical view
Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Phase space data
Type of data saved
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n X[mm]
Y[mm]
Z[mm]
dx dy dz kinEnergy
[MeV]
Part Type
Prim part type
Prim part
0 18.57 45.06 -831 0.03934 0.095413 0.99455 1.41684 22 11 33
1 57.61 27.74 -831 0.12265 0.058820 0.99004 1.35906 22 11 71
Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Phantom voxelization
Type of data saved
8
Phys Volume X[mm]
Y[mm]
Z[mm]
ix iy iz Dose[Gy]
Dose^2[Gy^2]
nEvents
fullWaterPhantomPV
-297 -297 -177 0 0 27 1.78e-09 1.36e-18 9
.... .. .. ...
Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Experimental vs Calculated data
Type of data saved
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% 6 MeV Tutte le misure gaf 10 luglio 2009 campo 3x3n208=2;fh208=[0 10 3.10291e+0710 758 2.73489e+07];% x [mm], y [mm], z [mm], expDose [Gy], Calculated dose [Gy], Calculated dose2 [Gy^2], nEvents, normDose [Gy], normDoseError [Gy]d208=[0 0 -300 0.6644 5.93877e-09 1.01606e-18 490.184275 0.01706470 0 -290 4.3128 1.44254e-07 1.05554e-15 2744.47607 0.9729410 0 -258 2.7057 7.59039e-08 2.80751e-16 652.35523 0.433426….];
Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Graphical view
Dedicated programs have to be used to generate the wanted graphs
We use matlab programs
10Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Graphical view: examples
Comparison between calculated and measured data
11Geant4 School, 12-14 October 2009, Catania Italy
Geant4 Low Energy Electromagnetic Physics Working Group
Graphical view: 3D
Two examples of a section of the ROG
12Geant4 School, 12-14 October 2009, Catania Italy
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