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Forum: Event and Track Management
Re: Question Tracking Cuts (Chris Savage)
Re: None Re: Tracking Cuts (Makoto Asai)
Date: 10 Dec, 2002
From: <savage@neutrino.physics.ucsb.edu>

*** Discussion title: Event and Track Management
In-Reply-To: <"/eventtrackmanage/61/1"@geant4-hn.slac.stanford.edu>
Subject: Tracking Cuts


On Mon, 9 Dec 2002, Makoto Asai wrote:

>
> In Geant4, there is no "energy-cut" applied for a track.
> The "cut" the user defines is "production" cut-off which
> is applied for generating secondaries caused by an interaction
> of a track. This production cutt-off is utilized to avoid
> infrared divergence of some EM processes.

OK, I was a bit confused.  G4ParticleWithCuts creates a G4double vector
SetCutInMaxInteractionLength corresponding to a length cut in the various
materials.  This then appears to be converted to another G4double vector
theKineticEnergyCuts corresponding to an energy cut in the various
materials.  Both of these vectors are then only used as a reference for
processes to determine if secondaries should be created?  Does one of the
managers handle these secondary cuts or are the cuts handled internally in
each process?

Thanks for your help.


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1 None: Re: Tracking Cuts   (Makoto Asai - 10 Dec, 2002)
(_ None: Re: Tracking Cuts   (savage@neutrino.physics.ucsb.edu - 10 Dec, 2002)
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