|Message: Large number of initial particles||Not Logged In (login)|
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Hi, I'd like to count the number of recoil protons escaping a thin slice of polyethylene irradiating with MeV neutrons. Instead of using Hit & SD classes, I wanted to try the scoring classes (G4PSFlatSurfaceCurrent) through the "G4Run* myRunAction::GenerateRun()" mecanism using a large number of initial particles through "new G4ParticleGun(1000000)". It works fine as soon as the number of neutrons is < 1e5. So I took the ExampleN01, and in exampleN01.cc: - commented the event & tracking verbose commands - changed the numberOfEvent to 1, in ExN01PrimaryGeneratorAction.cc - set n_particle to 1000000 (constructor) - commented the 'switch' statement (GeneratePrimaries) For 1e5 geantinos, everything's fine either on Windows XP or Scientific Linux 3.0.8. Depending on the OS, I get a "Segmentation Fault" above 1e6/1e7 geantinos. I'm using G4_8.2_p01 on a 3.2 GHz machine with 1GB RAM. I don't use any visulisation... http://geant4-hn.slac.stanford.edu:5090/HyperNews/public/get/runmanage/138.html As may indicate the mulassis source code http://reat.space.qinetiq.com/mulassis/ which would bring in ExN01Hit & ExN01SD, this may not be a proper way for counting purposes. If so, the interest of scoring classes would be a bit limited... Do I do anything wrong? Thanks for any help. Mathieu
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