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Forum: Fields: Magnetic and Otherwise
Re: Question Partial Charged Particles in Magnet Field? (Shanjie Xiao)
Re: Feedback Re: Partial Charged Particles in Magnet Field? (Gumplinger Peter)
Date: 18 Mar, 2013
From: Shanjie Xiao <Shanjie Xiao>

Thanks, but I did use vacuum for all the world, including the two regions with magnet field:

G4Material* Vacuum = new G4Material("Vacuum", 1.,
    1.01*g/mole, 1.e-20*g/cm3, kStateGas,
    0.1*kelvin, 1.e-10*pascal);


On Mon, 18 Mar 2013 20:34:33 GMT, Gumplinger Peter wrote:
> What is the density of the medium while your ions are in the magn.
> field? Try vacuum if it isn't. I am no expert, but for ions Geant4
> assumes a concept known as the 'effective charge' whereby ions quickly
> exchange electrons with the medium to an equilibrium so that the
> original charge state is not preserved. Please, see the E&M forum for
> some explanation and whether this is perhaps not also (wrongly) true for
> vacuum.

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