|Message: Re: Stopping all tracks at a specified plane||Not Logged In (login)|
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On Wed, 04 Jul 2012 02:02:05 GMT, Tom Roberts wrote:
> I want to force all tracks to stop at a specified plane bounded by a > circle or rectangle; my SteppingAction will then sample the track.[...]
> > I don't want to use a Tubs or Box with a thickness of a few nanometers > or microns, as that requires setting the tracking parameters so small > that efficiency is lost.
Why? Tracking _always_ terminates a step at a volume boundary, unconditionally. If you create an "infinitesimal" box, as you describe, then what will happen is that a single G4Step will traverse the volume (the PreStepPoint will be on the entry side, and the PostStepPoint on the exit side). I think that is what you want.
-- Michael Kelsey