Hey Stefan,
Thank you for your help. Adding the setting DISCARD -NEUTRIM seems to
have fixed my issue. It appears that FLUKA was discarding the primary
neutrinos before their interaction.
Cheers,
Michael
On Wed, Apr 14, 2021 at 1:49 AM Stefan E. Mueller <stefan.mueller_at_hzdr.de>
wrote:
> Dear Michael,
>
> for some entries in the DEFAULTS card, neutrinos are discarded (e.g.
> NEW-DEFA, PRECISION), I do not know if this holds also for primary
> neutrinos (the fluka-discuss-thread you mentioned indeed suggests
> that it should not). This would mean neutrinos are not transported, I am
> not fully sure if this means that they also would not interact.
>
> Anyway, one can explicitely ask FLUKA to not discard (anti)neutrinos by
> e.g. setting
>
> DISCARD -NEUTRIE -ANEUTRIE
>
> but I do not know if this will solve your problem (but it may be
> worthwhile to try).
>
> Which "default FLUKA file" are you using? I assume that your lead target
> is big enough for the neutrinos to have a non-zero interaction probability.
> And what is the energy of the neutrinos in your case?
>
> 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 Tue, 13 Apr 2021, Michael Waterbury wrote:
>
> > Dear FLUKA experts,
> >
> > It was my understanding that FLUKA forced a neutrino interaction at the
> beam
> > location when neutrinos are the primary particles (see this older
> > [fluka-discuss] thread
> > http://www.fluka.org/web_archive/earchive/new-fluka-discuss/8808.html).
> If I
> > run a default FLUKA file from FLAIR with primary neutrinos in lead, I
> find
> > zero interactions. Am I misunderstanding something about the way FLUKA
> > handles neutrino interactions? Is there an option I need to enable?
> >
> > Thank you for your help,
> >
> > Michael
> >
> >
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Received on Fri Apr 16 2021 - 11:47:17 CEST