[Gate-users] Phase Space Backscatter?

[Maikol Salas Ramirez]

Thank you for your reply, David. I apologize the description was not very
complete. Yes, I was referring to secondary particles, which entered to the
volume and were produced from particles that when out of the volume.
I am going to check what you suggest.

Best,
Maikol



El dom, 17 jul 2022 a las 13:19, David Leibold (<D.Leibold at tudelft.nl>)
escribió:

> Dear Maikol,
>
> you are talking about backscatter, but then you define it as “particles
> generated in the surround, which are daughters of particles that go out of
> the volume [to which the phase space is attached]”. I would say that when
> scatter occurs, the (back)scattered particle is still the same as the
> initial particle. Secondary production, on the other hand, refers to the
> generation of a new particle.
>
> A phase space actor records every particle only once. I was told that the
> reasoning behind this is probably that a phase space actor is intended to
> be used as a source as well. If a source emitted the same particle twice,
> that would be unphysical.
>
> I do not know how the phase space behaves concerning secondaries of
> particles that entered that phase space already, others my shed more light
> on this. You can find this out by simulating a pencil beam emitted by a
> source (e.g. z=0) hitting a volume to which a phase space actor is attached
> (e.g. z=1). Then you also add a second phase space actor behind the source
> (e.g. z= –1). If there is a secondary created, then you can check whether
> both phase space actors record that secondary.
>
> Kind regards,
> David
>
>
>
> > On 17 Jul2022, at 13:01, Maikol Salas Ramirez <mmsalas at gmail.com> wrote:
> >
> > Dear Gate users,
> >
> > I am using a phase space in my simulation. In the simulation, the volume
> to which the phase space is attached is surrounded by a radioactive source.
> The phase space is recording particles entering the volume. My question is
> if the phase space also records the backscatter (particles generated in the
> surround, which are daughters of particles that go out of the volume). The
> problem is that I don't know if I have to add a backscatter medium when I
> use the phase space or if it is already considered in the phase space.
> >
> > Best regards
> > Maikol
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