Re: USRBIN and geometry

From: Alberto Fasso' <fasso_at_mail.cern.ch>
Date: Thu, 14 Oct 2010 00:33:53 +0200

Dear Leena,

particle tracks are cut at boundaries, and your two inputs had a different
number of boundaries. For particles with energy larger than the cutoff,
the result should be the same: but a check that the energy is below the
cutoff is done at boundaries, and when you have less regions the checks
are less frequent. So, a small difference could arise due to particles
below threshold.
A similar, although not identical, effect was explained by Paola Sala
a few days ago (Oct. 7). See:
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/3231.html

Alberto

On Wed, 13 Oct 2010, L.Al-Sulaiti_at_surrey.ac.uk wrote:

> Dear FLUKA experts,
>
> As I knowm, USRBIN is geometry independent. However, when I changed the
> target geometry and sliced it by XYP palts I have found some differences in
> all USRBINs ( for dose, protons fluence, primary proton fluence and all
> particles). I have attached two files 1- with one body ''water traget''
> 2- the target was divided into many subregion. The question is why USRBIN
> results are not the same in both files. Do I have any error in the geomety
> that caused this difference? Would you please help me find it.
>
> Best regards
> Leena
Received on Thu Oct 14 2010 - 10:13:45 CEST

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