Re: [fluka-discuss]: Running older versions of Fluka

From: Stefan E. Mueller <stefan.mueller_at_hzdr.de>
Date: Thu, 11 Apr 2024 11:43:07 +0200 (CEST)

Dear Carl,

older versions of FLUKA "expire" and will not run anymore, with a notice
to please upgrade to a newer version.

Support is given only for the latest version, which is supposed to
supersede and improve the previous versions of FLUKA.

It is quite likely that models have changed between the versions, you can
always check the RELEASE-NOTEs to see what changed. In particular, for
2023.3, $FLUPRO/RELEASE-NOTES.fluka2023.3 states:

   - Photonuclear interactions: both cross sections and models are
     completely new above ~100 MeV: this is a major improvement which gets
     rid of many limitations and inaccuracies of the the previous
     implementation;

So maybe this could explain the differences you see?

Cheers,

         Stefan

--
Stefan E. Mueller
Department of Information Services and Computing - Computational Science
and Institute of Radiation Physics
Helmholtz-Zentrum Dresden-Rossendorf
Tel: +49 (0351) 260 3847
Stefan.Mueller_at_hzdr.de
http://www.hzdr.de
Vorstand: Prof. Dr. Sebastian M. Schmidt, Dr. Diana Stiller
Vereinsregister: VR 1693 beim Amtsgericht Dresden
On Mon, 8 Apr 2024, Carl Ross wrote:
> 
> I obtained a series of results using Fluka 2020.0 a few years ago.
> 
> I am now running Fluka 2023.3.3.
> 
> For the same (??) input file I am now getting somewhat different results.
> 
> Unfortunately, when I try to run my old code I get a message saying the
> version of Fluka is obsolete (or I'm not allowed to use Fluka).
> 
> Is it not possible to run older versions of Fluka?
> 
> Have there been any significant changes to the photonuclear model between
> these two releases?
> 
> Thanks,
> 
> Carl Ross
> 
>

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Received on Thu Apr 11 2024 - 13:52:42 CEST