|Message: Re: the proper time goes back||Not Logged In (login)|
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> I have followed the recommendation gave by
> Peter Gumplinger http://tinyurl.com/nfpk7t
Thanks for bringing this to my/users' attention. The code in the above forum link is still not entierly correct; it would be for a localized pure magnetic field but for EM-fields we need:
G4int nvar = 8; // To integrate time & energy // in addition to position, momentum
and the correct code for EM-fields should read:
G4int nvar = 8; fStepper = new G4ClassicalRK4( fEquation, nvar );
for the default in the G4ClassicalRK4 constructor is nvar=6 and hence tailored to pure mag. fields.
you can then subsequently use:
fIntgrDriver = new G4MagInt_Driver(fMinStep, fStepper, fStepper->GetNumberOfVariables() );
This should be the right approach rather than just:
fIntgrDriver = new G4MagInt_Driver(fMinStep, fStepper, 8);
Please, also see the code fragment (Example 4.12) in the Application Developers Guide:
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