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Forum: Fields: Magnetic and Otherwise
Re: None 'non-continous' electron trajectories (Dragos Constantin)
Re: None Re: 'non-continous' electron trajectories (John Apostolakis)
Re: None Re: 'non-continous' electron trajectories (Dragos Constantin)
Date: 23 Mar, 2016
From: John Apostolakis <John Apostolakis>

Dear Dragos,

In nearly all Geant4 simulations no lateral displacement is applied at a boundary.  There has recently been an experimental mode of MSc which tries to apply such a ‘correction’, but it experimental and valid only in certain types of geometries.

If you use the single-scattering mode of MSC, then these kinks should disappear.  So checking this will be a good confirmation.

By the way, it was my long-time Geant4 colleague John Allison who responded about visualisation.

John Apostolakis
===================================================
John Apostolakis,  EP Department, CERN
SFT (SoFTware for Experiments) Group
Office: Building 32/ room R-003 (ground floor),  Mail: J27210
Email:  john.apostolakis@cern.ch       Office Tel:  +41-22-767-7239
------------------------------------------------------------------------------------------

> On 21 Mar 2016, at 16:55, Dragos Constantin <dragos.constantin@gmail.com> wrote:
> 
> 
> *** Discussion title: Fields: Magnetic and Otherwise
> 
> Dear John,
> 
> What you are describing makes sense. However, I wonder what happens if
> the trajectory crosses in a volume with higher Z before the MSC event
> happens? Is the correction applied at the volume boundary? I am going to
> look at the simple scattering model to see if these artifacts are
> present for that model as well. Originally I thought it might be the
> OpenGL issue you have mentioned last week in here:
> 
> http://hypernews.slac.stanford.edu/HyperNews/geant4/get/visualization/794/1/1/1/1.html
> 
> Thanks again,
> 
> Dragos
> 
> -------------------------------------------------------------
> Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: 
> http://hypernews.slac.stanford.edu/HyperNews/geant4/get/emfields/240/1/1.html 

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