Thanks, I'll try the advice
Annamaria
Il 2024-03-18 16:47 Paola Sala ha scritto:
> Dear Annamaria
> Probably I do not understand correctly your question, I'll try some
> hints:
> You do not need anything specifics for alphas, besides the low-pwxs.
> The PRECISION default already activates the transport of all ions,
> and the transport of neutrons down to thermal.
> LOW-PWXS refer to neutrons...but: If it is not there, neutron
> interactions are treated in a "multi-group" approach. This means both
> a treatment based on neutron energy intervals, and some limitation in
> the outcome of interactions,. In particular protons, alphas and other
> charged are not really generated, their energy is simply deposited on
> the point of production--> no alphas
> With low-pwxs, you get two things: continuous neutron energy, AND
> fully correlated generation of all interaction products--> yes alphas
>
> Then, I see a problem in your geometry: the second target region
> (regSiC4) does not exist: it is defined as contained in a 10 micron
> long cylinder, and downstream
> of a plane at 2.5 cm from the cylinder entrance. This is a null
> region, thus you'll get no results from your boundary crossings.
>
> In view of the short alpha range, if you want to be sure to see them
> it would be worthwhile to add a usrtrack or a userbin scoring alphas
> within the target.
>
> You can also look at the fluka output file, at the end there is a
> summary of particles produced in the run
>
> Hope this helps
> Paola
> On 3/17/24 23:16, muoio wrote:
>>
>> Thanks very much for the quick response,I looked the manual
>>
>> http://www.fluka.org/content/manuals/online/LOW-PWXS.html
>>
>> but for alpha particles do you have some example?
>> thanks a lot
>> A. Muoio
>>
>> Il 2024-03-17 19:02 Paola Sala ha scritto:
>>> Hello
>>> in order to produce and transport charged particles from low energy
>>> neutron interactions you have to activate the new point-wise
>>> treatment,
>>> by adding the LOW-PWXS card.
>>> Please have a look at its description in the manual, and ask if
>>> something is not clear
>>> Regards
>>> Paola
>>> On 3/16/24 16:08, muoio wrote:
>>>>
>>>> good morning experts, I tried to insert the analysis request for
>>>> alpha particles into my simulation, but I get a result that I don't
>>>> expect... practically zero.
>>>> The situation is
>>>>
>>>> Energy Neutron = 14.1 MeV Number of primary= 10^8 x 5 run
>>>> Fluence = 4.45 10^11 (n/cm2) Profile Beam=Flat
>>>> Surface = (5 x 5) mm
>>>> Spessore 100 um
>>>>
>>>> I expect alpha particles from secondary reactions induced by the
>>>> interaction of neutrons with SiC.
>>>> I attach the *.inp file that I tried to run
>>>>
>>>> thanks a lot
>>>> Annamaria Muoio
>>>>
>>>>
>>>>
>>
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Received on Mon Mar 18 2024 - 19:27:01 CET