|Message: Gradient in G4QuadrupoleMagField||Not Logged In (login)|
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Hello, Im just asking because I have not found any example. The gradient in G4QuadrupoleMagField(gradient) can be given in tesla/m? G4double gradient=223*tesla/m;
PS actually is this code correct for setting up the Quadrupole mag field in only a part of geometry (logicSpace_Pipe): G4double fGradient = -223.*tesla/m; G4QuadrupoleMagField* pipeField = new G4QuadrupoleMagField(fGradient); G4Mag_UsualEqRhs* myEquation = new G4Mag_UsualEqRhs(pipeField); G4MagIntegratorStepper* myStepper = new G4ClassicalRK4(myEquation); G4ChordFinder* myChordFinder = new G4ChordFinder(pipeField,0.1*mm,myStepper);
G4FieldManager* fieldMgr = new G4FieldManager(pipeField,myChordFinder,false);
I'm asking because it gives warnings in the parts of the geometry which are quite far from Space_Pipe: WARNING - G4Navigator::ComputeStep() Track stuck, not moving for 10 steps in volume -Austenitic_Steel_Collar- at point (89.47743818,103.7805885,1461.432287) direction: (0.1819718324,-0.1776272256,0.9671270966). Potential geometry or navigation problem ! Trying pushing it of 9e-10 mm ...
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