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Forum: Electromagnetic Processes
Re: Question Low energy muons - how to limit their step length (Kamil Sedlak)
Date: Oct 11, 15:20
From: michel maire <michel maire>

On Wed, 07 Oct 2009 08:47:32 GMT, Kamil Sedlak wrote:

> MY QUESTIONS:
> 1) What would be the ideal way/method to limit the step length of muons without affecting
>    the step length of other particles?
> 2) How do I find the proper step length cut for the muons in different materials?

 If you wish, step size can be limited via G4StepLimiter. It can be set by logical volume and by particle type.
 An illustration is in examples/novice/N02 :
 - in detectorConstruction, a stepLimit value in affected to logicalTracker
 - in PhysicsList::AddStepMax(), the G4StepLimiter process is attached to all charged particles. If you replace the statement :

 if (particle->GetPDGCharge() != 0.0) by if (particle == G4MuonPlus::MuonPlus()),

 G4StepLimiter will be applied to mu+ only.

                Michel

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