Dear Andrea,
Oh, it's very useful. I haven't seen this before.
Cheers,
Viktor
2017-02-25 15:21 GMT+02:00 Andrea Fontana <andrea.fontana_at_pv.infn.it>:
> Hi Viktor,
> from the output file you can get this report about the optical
> photons generated in your material:
>
> Number of optical photon interactions per beam particle
> Prompt radiation Radioactive decays
> 9.9260E+03 (100.%) 0.0000E+00 (100.%)
> 8.0750E+03 (81.4%) 0.0000E+00 ( 0.0%) absorptions
> 1.8510E+03 (18.6%) 0.0000E+00 ( 0.0%) diffusions
> 0.0000E+00 ( 0.0%) 0.0000E+00 ( 0.0%) escapes
> 0.0000E+00 ( 0.0%) 0.0000E+00 ( 0.0%) time-kill
>
> Andrea
>
> Il 25/02/2017 09:33, Віктор Родін ha scritto:
>
>> Dear Andrea,
>> Thank you for your test. I will take this into account. Also I want to
>> draw your attention on such thing. Primary optical photons have energy(20
>> eV) greater than energetic boundaries of material( 1 -10 eV) for
>> propagation of optical photons and it looks like they will be absorbed in
>> the material but i'm not confident in that. What are they doing in reality?
>> Best regards,
>> Viktor
>>
>> 2017-02-24 23:48 GMT+02:00 Andrea Fontana <andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>>:
>>
>>
>> Hello Viktor,
>> I have tested your method for generating secondary optical photons
>> with an arbitrary spectrum with the WVLNSH user routine: in essence,
>> if I understand correctly, you propose to mimick a wavelength shifter
>> to generate optical photons with a given spectrum in a material.
>>
>> This might work, but I feel this is not the intended use for the
>> routine and I see at least 2 limitations that might take you
>> into trouble:
>>
>> - you are limited to a maximum of 10 secondary photons, given
>> by the sizeof the relevant arrays used internally
>> by FLUKA. So you do not gain much compared to the 3 lines
>> allowed by the standard Fluka interface;
>>
>> - you have to take care of the energy conservation by hand:
>> for example, you have to make sure that the total energy of the
>> secondaries does not exceed the energy of the primary photon.
>> If this condition occurs ( SECONDARY E > INITIAL E ), Fluka will
>> abort the run.
>>
>> Hope this helps,
>> Andrea
>>
>>
>> Il 21/02/2017 22:31, Віктор Родін ha scritto:
>>
>> Dear Andrea,
>> I found a way how to reproduce more than 3 monochromatic
>> photons. It looks strange and I'm not sure it's correct but I
>> have spectrum of more than 3 lines. I've done it with help of
>> the WVLNSH routine. Also I have strange values in USRTRACK on
>> Y axis but it's not scary. Output file gives me normal number
>> of the created photons. Could you comment this method?I've
>> attached my inp file and WVLNSH routine.
>> Best regards,
>> Viktor
>>
>> 2017-02-21 15:34 GMT+02:00 Andrea Fontana
>> <andrea.fontana_at_pv.infn.it <mailto:andrea.fontana_at_pv.infn.it>
>> <mailto:andrea.fontana_at_pv.infn.it
>>
>> <mailto:andrea.fontana_at_pv.infn.it>>>:
>>
>>
>> Hi Viktor,
>> for scintillation light in FLUKA, for the moment, only
>> monochromatic
>> photons are considered, with a maximum of 3 different lines.
>>
>> Optical photons are treated differently from the high energy
>> photons and
>> from the other particles: for example it is not possible
>> to use
>> them as
>> primary particles nor it is possible to define them in a
>> source.f
>> routine and assign their energy.
>>
>> However, you can perhaps try a non-standard source_opt.f
>> routine,
>> as suggested in this old message in the forum:
>>
>> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/
>> 3272.html
>> <http://www.fluka.org/web_archive/earchive/new-fluka-discuss
>> /3272.html>
>> <http://www.fluka.org/web_arc
>> hive/earchive/new-fluka-discuss/3272.html
>> <http://www.fluka.org/web_archive/earchive/new-fluka-discuss
>> /3272.html>>
>>
>> This might suit your needs.
>>
>> Cheers,
>> Andrea
>>
>>
>> Il 21/02/2017 13:43, Віктор Родін ha scritto:
>>
>> Dear Andrea,
>> Thank you for reply. I understand that we use OPT routines
>> when wavelenth is varied. I have another question
>> related to
>> the production of photons . Is it possible to set the
>> scintillation spectrum in FLUKA?The simplest way is
>> setting of
>> huge number of OPT-PROD cards with different % of dose for
>> each energy. Do we have another way?
>> Cheers,
>> Viktor
>>
>> 2017-02-21 8:17 GMT+02:00 Andrea Fontana
>> <andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>
>>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>>>>:
>>
>>
>> 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
>> <http://www.fluka.org/web_archive/earchive/new-fluka-discuss
>> /7106.html>
>> <http://www.fluka.org/web_arc
>> hive/earchive/new-fluka-discuss/7106.html
>> <http://www.fluka.org/web_archive/earchive/new-fluka-discuss
>> /7106.html>>
>> <http://www.fluka.org/web_arch
>> ive/earchive/new-fluka-discuss/7106.html
>> <http://www.fluka.org/web_archive/earchive/new-fluka-discuss
>> /7106.html>
>> <http://www.fluka.org/web_arc
>> hive/earchive/new-fluka-discuss/7106.html
>> <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
>>
>>
>> --
>> ============================================================
>> ============
>> Dr. Andrea Fontana tel: +39
>> 0382 987991 <tel:%2B39%200382%20987991>
>> <tel:%2B39%200382%20987991>
>> <tel:%2B39%200382%20987991>
>> Istituto Nazionale fax: +39
>> 0382 423241 <tel:%2B39%200382%20423241>
>> <tel:%2B39%200382%20423241>
>> <tel:%2B39%200382%20423241>
>> di Fisica Nucleare
>> Sezione di Pavia e-mail:
>> andrea.fontana_at_pv.infn.it <mailto:andrea.fontana_at_pv.infn.it>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>>>
>> Via Bassi 6 web :
>> www.pv.infn.it/~fontana <http://www.pv.infn.it/%7Efontana>
>> <http://www.pv.infn.it/%7Efontana
>> <http://www.pv.infn.it/%7Efontana>>
>> <http://www.pv.infn.it/%7Efontana
>> <http://www.pv.infn.it/%7Efontana>
>> <http://www.pv.infn.it/%7Efontana
>> <http://www.pv.infn.it/%7Efontana>>>
>> 27100 PAVIA, Italy
>> ==============================
>> ==========================================
>>
>>
>>
>> -- ==============================
>> ==========================================
>> Dr. Andrea Fontana tel: +39 0382 987991
>> <tel:%2B39%200382%20987991>
>> <tel:%2B39%200382%20987991>
>> Istituto Nazionale fax: +39 0382 423241
>> <tel:%2B39%200382%20423241>
>> <tel:%2B39%200382%20423241>
>> di Fisica Nucleare
>> Sezione di Pavia e-mail:
>> andrea.fontana_at_pv.infn.it <mailto:andrea.fontana_at_pv.infn.it>
>> <mailto:andrea.fontana_at_pv.infn.it
>> <mailto:andrea.fontana_at_pv.infn.it>>
>> Via Bassi 6 web :
>> www.pv.infn.it/~fontana <http://www.pv.infn.it/%7Efontana>
>> <http://www.pv.infn.it/%7Efontana
>> <http://www.pv.infn.it/%7Efontana>>
>> 27100 PAVIA, Italy
>> =============================
>> ===========================================
>>
>>
>>
>> -- ===========================================================
>> =============
>> Dr. Andrea Fontana tel: +39 0382 987991
>> <tel:%2B39%200382%20987991>
>> Istituto Nazionale fax: +39 0382 423241
>> <tel:%2B39%200382%20423241>
>> di Fisica Nucleare
>> Sezione di Pavia e-mail:
>> andrea.fontana_at_pv.infn.it <mailto:andrea.fontana_at_pv.infn.it>
>> Via Bassi 6 web :
>> www.pv.infn.it/~fontana <http://www.pv.infn.it/%7Efontana>
>> 27100 PAVIA, Italy
>> ============================================================
>> ============
>>
>>
>>
> --
> ========================================================================
> 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 Sat Feb 25 2017 - 16:42:28 CET