Hi
fluka2011 is very old, it does not yet include the pointwise treatment
(and many other new/improved features)
Please upgrade, you will find the fluka2023 version on *www.fluka.org.*
Also, from the same website, please download the python3 version of flair
(flair-2.3-0dpy3 <
http://www.fluka.org/flair/flair-2.3-0dpy3.src.rpm>)
Regards
Paola
On 3/19/24 11:57, muoio wrote:
> dear experts, unfortunately I can't find it in my fluka and in the
> interface
> Flair graphics the LOW-PWXS card, the fluka version is version 2011.2x-6
> the flair version:2.3-0
>
> can you help me?
> Annamaria
>
>
> Il 2024-03-18 17:05 muoio ha scritto:
>> 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 Tue Mar 19 2024 - 17:05:41 CET