Dear Luca
In the input you sent, the production of optical photons is activated
onluy in material number 3 (what(4) of the OPT-PROD card). Material number
3 in the internal fluka numbering is Hydrogen. You should activate
scintillation in your material YAG: what(4)=YAG. The same for the OPT-PROP
cards
Then: you issue an OPT-PROP card with the first three whats=-100. This
means that you have modified three user routines defining refraction
index, absorption coefficient and diffusion coefficient: is this that you
want? If not, you should input actual numbers for the three quantities.
Fluka dos not have a database of optical properties, they must be input by
the user either as fixed numbers or through user routines (templates
exist).
The same for the OPT-PROP card with SDUM=SENSITIV. This card is useful
only to reduce CPU time, you can skip it.
Then: you define the material YAG, but it is not assigned to any region.
The regions you have are made of concrete, blackhole and vacuum.
Hope this helps
Paola
> Dear FLUKA experts,<signatureafterquotedtext></signatureafterquotedtext>
> I'm a master student in Milan and I'm new to FLUKA.
> After reading the documentation and the manual, I tried to write a code to
> simulate the conversion of soft x-rays (PHOTON with kinetic energy approx.
> 10 keV) into optical photons due to the incidence on a YAG:Ce layer.
> My first aim would be to study the point spread function of this system.
> Although I found it a bit difficult since optical properties of the
> materials and both light generation and propagation are switched off by
> default, I was confident it was ok.
>
> However, when I run my code, the output of the USRBDX card for example
> shows 0.000E+00 for all of the energy and angular intervals, and I can't
> figure out if the problem is the way I wrote the code or it is due to a
> wrong definition of the properties of this problem.
> I attach to this email my input file (example.inp) and an example of the
> output I get from the USRBDX card.
>
> Thank you all in advance for any help or suggestion.
> Kind regards,
>
> Luca Teruzzi
>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Fri Jul 31 2020 - 17:37:30 CEST