<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Dear Gate users, <br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I have the following model : 1 cell inside of which there are 12 clusters of 8000 nanoparticles each.<br data-mce-bogus="1"></div><div>My source is composed of a gamma beam of 5 keV.<br data-mce-bogus="1"></div><div>My simulation works fine up to 10^9 photons send. But with 10^10 primaries nothing happens anymore (there is no error message).<br data-mce-bogus="1"></div><div>Does someone have an idea what the problem might be ?<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Thank you very much for your help,<br data-mce-bogus="1"></div><div>Regards,<br data-mce-bogus="1"></div><div>Sarah Blind<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>world.mac<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><blockquote><div>/gate/world/geometry/setXLength 30 um<br>/gate/world/geometry/setYLength 30 um<br>/gate/world/geometry/setZLength 30 um<br>/gate/world/setMaterial Air<br><br>/gate/world/daughters/name cell<br>/gate/world/daughters/insert sphere<br>/gate/cell/geometry/setRmin 0.0 mm<br>/gate/cell/geometry/setRmax 10 um<br>/gate/cell/placement/setTranslation 0 0 0 um<br>/gate/cell/setMaterial G4_WATER<br>/gate/cell/vis/setVisible 1<br>/gate/cell/vis/setColor blue<br>/gate/cell/vis/forceSolid false<br><br>/gate/cell/daughters/name cluster<br>/gate/cell/daughters/insert sphere<br>/gate/cluster/geometry/setRmin 0.0 mm<br>/gate/cluster/geometry/setRmax 500 nm<br>/gate/cluster/placement/setTranslation 0 0 0 um<br>/gate/cluster/setMaterial G4_WATER<br>/gate/cluster/vis/setVisible 1<br>/gate/cluster/vis/setColor yellow<br>/gate/cluster/vis/forceSolid false<br><br>/gate/cluster/daughters/name NP<br>/gate/cluster/daughters/insert sphere<br>/gate/NP/geometry/setRmin 0 mm<br>/gate/NP/geometry/setRmax 2 nm<br>/gate/NP/placement/setTranslation 0 0 0 mm<br>/gate/NP/setMaterial Bismuth<br>/gate/NP/vis/setVisible 1<br>/gate/NP/vis/setColor red<br>/gate/NP/vis/forceSolid true<br><br><br>/gate/NP/repeaters/insert cubicArray<br>/gate/NP/cubicArray/setRepeatNumberX 20<br>/gate/NP/cubicArray/setRepeatNumberY 20<br>/gate/NP/cubicArray/setRepeatNumberZ 20<br>/gate/NP/cubicArray/setRepeatVector 5 5 5 nm<br><br>/gate/cluster/repeaters/insert cubicArray<br>/gate/cluster/cubicArray/setRepeatNumberX 3<br>/gate/cluster/cubicArray/setRepeatNumberY 2<br>/gate/cluster/cubicArray/setRepeatNumberZ 2<br>/gate/cluster/cubicArray/setRepeatVector 5 5 5 um<br></div><div><br data-mce-bogus="1"></div></blockquote><div>physics.mac<br data-mce-bogus="1"></div><blockquote><div><br>/gate/physics/addPhysicsList QGSP_BERT_EMV<br><br>/gate/physics/Gamma/SetCutInRegion world 50 nm<br>/gate/physics/Electron/SetCutInRegion world 50 nm<br><br>/gate/physics/Gamma/SetCutInRegion cell 20 nm<br>/gate/physics/Electron/SetCutInRegion cell 20 nm<br><br>/gate/physics/Gamma/SetCutInRegion cluster 5 nm<br>/gate/physics/Electron/SetCutInRegion cluster 5 nm<br><br>/gate/physics/Gamma/SetCutInRegion NP 0.5 nm<br>/gate/physics/Electron/SetCutInRegion NP 0.5 nm</div><div><br>/gate/random/setEngineName MersenneTwister <br><br>/gate/physics/addAtomDeexcitation<br><br>/gate/physics/addProcess PhotoElectric gamma<br>/gate/physics/processes/PhotoElectric/setModel LivermoreModel<br>/gate/physics/processes/PhotoElectric/setAugerElectron true<br>/gate/physics/processes/PhotoElectric/setDeltaRayCut 10 eV<br>/gate/physics/processes/PhotoElectric/setXRayCut 10 eV<br>/gate/physics/processes/PhotoElectric/setStepFunction e- 0.2 0.1 nm<br><br>/gate/physics/addProcess Compton gamma<br>/gate/physics/processes/Compton/setModel LivermoreModel<br>/gate/physics/processes/Compton/setStepFunction e- 0.2 0.1 nm<br><br>/gate/physics/addProcess RayleighScattering<br>/gate/physics/processes/RayleighScattering/setModel LivermoreModel<br><br>/gate/physics/addProcess GammaConversion<br>/gate/physics/processes/GammaConversion/setModel LivermoreModel<br><br>/gate/physics/addProcess ElectronIonisation<br>/gate/physics/processes/ElectronIonisation/setModel LivermoreModel e-<br>/gate/physics/processes/ElectronIonisation/setModel PenelopeModel e+<br>/gate/physics/processes/ElectronIonisation/setStepFunction e- 0.2 0.1 nm<br><br>/gate/physics/addProcess Bremsstrahlung e-<br>/gate/physics/addProcess Bremsstrahlung e+<br>/gate/physics/processes/Bremsstrahlung/setModel LivermoreModel e-<br>/gate/physics/processes/Bremsstrahlung/setModel PenelopeModel e+<br><br>/gate/physics/addProcess eMultipleScattering e-<br>/gate/physics/addProcess eMultipleScattering e+<br>/gate/physics/processes/eMultipleScattering/setModel UrbanModel e-<br>/gate/physics/processes/eMultipleScattering/setModel UrbanModel e+<br><br>/gate/physics/SetMinKineticEnergyInRegion world 1 eV<br>/gate/physics/SetMinKineticEnergyInRegion cell 1 eV<br>/gate/physics/ActivateSpecialCuts gamma</div></blockquote><div><br data-mce-bogus="1"></div><div>source.mac</div><blockquote><div><br>/gate/source/addSource mybeam gps<br>/gate/source/mybeam/gps/particle gamma<br>/gate/source/mybeam/gps/pos/type Beam<br>/gate/source/mybeam/gps/ene/mono 5 keV<br>/gate/source/mybeam/gps/ene/type Gauss<br>/gate/source/mybeam/gps/ene/sigma 1.0 keV<br>/gate/source/mybeam/gps/direction 0 0 -1<br><br>/gate/source/mybeam/gps/position 0 0 15 um<br>/gate/source/mybeam/gps/pos/type Volume<br>/gate/source/mybeam/gps/pos/shape Cylinder<br>/gate/source/mybeam/gps/pos/inner_radius 0 mm<br>/gate/source/mybeam/gps/pos/radius 10 um<br>/gate/source/mybeam/gps/pos/halfz 0.01 um<br>/gate/source/mybeam/gps/ang/type beam2d<br> <br><br><br><br data-mce-bogus="1"></div></blockquote><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div></div></body></html>