Re: AUXSCORE for particle filtering

Dear Roger
by means of AUSCORE you can filter only the energy deposition
directly attributable to the particle that you select. For instance this
direct deposition, in a MC calculation, is the
deposition associated to dE/dX along the path below the energy threshold
to produce explicitly a delta ray.

Let us suppose that you are filtering for PROTONS:
whenever you produce explicitely a delta-ray, this will be an electron
and this escapes filtering. The same occurs when you produce other particles
(neutrons, pions, etc.) if the proton undergoes inelastic interactions.

In FLUKA there is the possibility to associate secondary particles to a
given parent, but this is accomplished by means of a user routine which allows to
access the particle stack. This is stuprf.f routine.
Its use is part of the advanced use of FLUKA

For initial infos on stuprf see:
https://www.fluka.org/free_download/course/portugal2010/Lectures/AdvancedUserRoutines2010.pdf
and in the archive of fluka-discussion list:
( http://www.fluka.org/web_archive/earchive/new-fluka-discuss/index.html )
look for stuprf

Best regards
      Giuseppe Battistoni

On 01/29/2011 02:58 PM, rhaelg_at_phys.ethz.ch wrote:
> Dear FLUKA experts
>
> I read all the messages in the archive about the AUXSCORE card.
> Especially the reply of Alfredo
> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/2362.html
>
> Unfortunately I still don't understand completely what happens by
> filtering the estimators for an individual particle using an AUXSCORE
> card.
>
> I understand the principle of indirectly ionizing radiation and the
> consequences for dose deposition. I am interested in what FLUKA exactly
> does when filtering for instance dose for a specific particle.
>
> Alfredo said: "In FLUKA, energy is "deposited by photons" when the
> photon energy becomes lower than the photon transport threshold". It is
> clear to me, that there is a transportation cutoff and that the energy
> is deposited on that spot. But are these the only contributions that are
> scored when filtering dose for a specific particle (in this case
> photons) with the AUXSCORE card?
>
> Or from another point of view, I want to score the dose which is induced
> by a specific type of particle in a mixed irradiation field including
> the dose deposited by secondary particles. For instance in a mixed field
> of photons and neutrons I want to score the dose which is induced by
> neutrons and all the secondary particles arising from neutron
> interactions. Is this possible and how can I achieve that?
>
> Thank you very much for your help!
>
> Regards,
>
> Roger Haeig
>
Received on Mon Jan 31 2011 - 18:07:30 CET