|Message: local quadrupole field fills all the "World space"||Not Logged In (login)|
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Hello, I'm trying to simulate an accelerator beam-line with a quadrupole. As a first step, I create two simple classes: One representing the Pipe, the other for the Quadrupole, I expected the heavy ion particles coming in the beam, should "feel" the quadrupole field just as it enters in the "Quadrupole zone" defined by G4Box, G4LogicalVolume, etc (as stated in its class) , NOT in the Pipe (Where is no field defined) ... But, as run the code, the quadrupole-field fills the *ENTIRE* World (pipe+quadrupole) space, not just the "quadrupole area" despite I've used local field: (...) solidQuad = new G4Box("Quad", 45.*cm, 45.*cm, 50.*cm); logicQuad = new G4LogicalVolume(solidQuad, Material, Material->GetName()); physiQuad = new G4PVPlacement(trip_rot, G4ThreeVector(0.,0.,-50.*cm), logicQuad, Material->GetName(), World, false, 0); //apply a quadrupole field G4FieldManager* fieldMgr = G4TransportationManager::GetTransportationManager()->GetFieldManager(); QuadmagField = new G4QuadrupoleMagField(pGradient, G4ThreeVector(0.,0.,0.), Rot); // Set field as local just for "logicQuad" logicQuad->SetFieldManager( fieldMgr, allLocal ) ; fieldMgr->SetDetectorField(QuadmagField); fieldMgr->CreateChordFinder(QuadmagField); (...) Any idea Whatś wrong? thank you in advance [ MIME part of type text/html without a name stripped ]
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