So, if I want to use the poin-wise transport I have to deactivate the
LOW-NEUT cards? I was trying to activate the LOW-PWXS only for tungste
because from what I understood from the manual for some elements, like
hydrogen , carbon, helium, etc., is always active. Also, requesting the
LOW-PWXS for whole material list could be time consuming and
unfortunately I have limited time on the server to run the simulations.
I put the LOW-MAT card for hydrogen because I want that the cross
sections for the hydrogen bound with carbon to be used. I made some test
and I notice that the results are more realistic using these cross
sections instead that the defaut ones where the hydrogen is considered
bounded with oxygen. There is a way to enlight this also in the poitwise
transport or this modification is no longer necessary?
For the geometru, usually I do not need to track anything in the around
regions. So, I do not need to improve it.
Best regards and thank you for your time, Alessandro Calamida.
Il 30/06/2024 00:15, Konstantin Batkov ha scritto:
> Hi Alessandro,
>
> The LOW-NEUT card is not needed with PRECISION defaults.
>
> With pointwise transport:
> - the LOW-MAT card is not necessary.
> - the LOW-PWXS card should be used either with individual isotopes
> (since pointwise cross-sections are per isotope) or for all materials
> with WHAT(1) = 1, as shown in the example on page 174 of the Manual.
>
> To make it work: remove LOW-NEUT and LOW-MAT, your current LOW-PWXS,
> and (unless you have a specific reason for using pointwise only for
> TUNGSTEN) add LOW-PWXS from that example:
> LOW-PWXS 1.0 HYDROGEN _at_LASTMAT
>
> If you want to use pointwise only for TUNGSTEN, redefine this material
> as a compound of its individual isotopes and add a separate LOW-PWXS
> for each isotope.
>
> Side note: to improve geometry tracking efficiency, optimize your
> regions by splitting them into simpler ones, especially the "around"
> regions.
> See slides 41-45 in this lecture:
> https://agenda.infn.it/event/20624/contributions/104766/attachments/68612/84867/AdvancedGeometry2019.pdf
>
> Best,
> Konstantin
>
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Received on Mon Jul 01 2024 - 12:34:56 CEST