Dear Viktor,
indeed data cards for optical photons allow to define the optical
properties in materials and at boundaries only for specific
frequencies, as you say, while user routines are more general and allow
to give a more complete representation of the physical problem.
For example, the refraction index can be defined with the OPT-PROP
card for the central frequency that one has defined, but for an extended
dispersion relation, one can use the routine RFRNDX implementing a
function or interpolating a data array.
The refraction index can also be varied with a region-based logic using
the function OPHBDX. The same applies also to the other optical
properties like absorption and diffusion coefficients.
For a complete example, if you have not found it already,
you can refer to this message by Giuseppe:
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/7106.html
It well complements the information from the manual.
Hope this helps.
Kind regards,
Andrea
Il 18/02/2017 16:47, Віктор Родін ha scritto:
> Dear FLUKA users and experts,
> I'm working with optical photons in FLUKA and discover new details for
> myself in the process. Now I have a question connected with physics of
> the optical boundaries. Is it enough set reflectivity, absorption,
> diffusion and refractive coefficients in the OPT-PROP card for
> receiving of the truthful results in the region borders ?For what
> goals should we use OPT-routines, for example OPHBDX? I think that
> other OPT routines we use if wavelength isn't constant. Is it
> true?Could you explain me difference?
> Best regards,
> Viktor
--
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Dr. Andrea Fontana tel: +39 0382 987991
Istituto Nazionale fax: +39 0382 423241
di Fisica Nucleare
Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it
Via Bassi 6 web : www.pv.infn.it/~fontana
27100 PAVIA, Italy
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Received on Tue Feb 21 2017 - 10:03:38 CET