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Re: None How to obtain the geometrical step length and true step length (Fada Guan)
Date: 14 Jan, 2014
From: Gumplinger Peter <Gumplinger Peter>

Again, this question is better posted in the EM Forum.

When you access GetStepLength from a user-hook (like SteppingAction), the return value is the true simulated step length; not the geometrical step length. For advanced users who might implement their own processes and need to know the destinction between AlongStep and PostStep loops, this comment in the code:

http://www-geant4.kek.jp/lxr/source/track/include/G4Step.hh#L109

should be noted.

Multiple scattering in G4 not only determines the final direction of a track after the step, but also the track's final position (lateral displacement) to account for the accummulated result of 'multiple scatterings' over the step. The scattering process also corrects for the step length increase due to scattering: geometric linear step length -> true step length due to the wiggles.

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1 None: Re: How to obtain the geometrical step length and true step length   (Fada Guan - 14 Jan, 2014)
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