Dear Bertrand,
There are two ways you could do it.
You could build your geometry in a way that you have some sort of
"shield" region for the irradiation process, and then replace it
with vacuum for the decay calculation.
The other way is described in this document here.
Basically it is an easy way to do the two step calculation.
https://cds.cern.ch/record/2051875
I did this as my bachelor's thesis. If you are interested I can send
you the source files.
Best regards,
Alexander Krainer
Quoting George Kharashvili <georgek_at_jlab.org>:
> Dear Bertrand,
>
> The short answer is no, or not easily. Proton transport threshold
> (set by default or by PART-THR card) applies to all regions and
> materials, while the electron, positron and photon production and
> transport thresholds (EMFCUT) are assigned by material and region
> respectively.
> FLUKA does allow replacing any region with vacuum or blackhole for
> calculating decay radiation transport, but unfortunately not the
> other way around (you can not assign a new material other than those
> two for decay radiation transport only).
>
> There must be more sophisticated ways of solving your problem, like
> scoring residual radioactivity in the target and then starting a new
> model with this activated target as the source of radiation in a
> separate model. But I don't think there is a simple solution that
> can be implemented in a one step calculation.
>
> Best regards,
> George
>
>
> ----- Original Message -----
> From: "Bertrand Dewit" <bertrand.dewit_at_student.kuleuven.be>
> To: "FLUKA Discussion List" <fluka-discuss_at_fluka.org>
> Sent: Thursday, February 23, 2017 11:44:33 AM
> Subject: [fluka-discuss]: stopping protons
>
> Dear FLUKA experts,
>
>
> I am a FLUKA beginner and I am currently trying to simulate the
> radiation caused by a proton irradiated target. The problem is that
> this irradiated target is transported afterwards transported to
> another area. It is in this area that I want to look at the
> radiation. My thought was to have the target already inside of the
> area to which it will be transported and have it irradiated there.
> But in that case I need to make sure that other parts of the room
> don't get exposed to the protons. Would it be possible to have a
> sphere around the beam and target that the protons of the beam can
> not cross, but the radiation of the activated target can?
>
>
> Thanks in advance!
>
>
> With kind regards,
>
> ?Bertrand
>
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Received on Fri Feb 24 2017 - 00:39:39 CET