Dear Hamideh,
in the source, you sample the energy but you do not define the momentum
accordingly. Instead of PMOFLK (NPFLKA) = PBEAM, you should write
PMOFLK (NPFLKA) = TKEFLK (NPFLKA).
In addition your USRBDX scores a spectrum with logarithmic intervals,
while the input spectrum is linear. This will certainly spoil the comparison.
Alberto
On Mon, 23 Feb 2015, Hamideh Jalali wrote:
> Dear FLUKA Users
>
> I am trying to modify the source.f user routine to read in a file
> containing flux data (photon/s in different energy intervals). For this
> purpose I followed exactly the exercise 8 in 8th FLUKA course.
>
> <http://goog_1002269095>
> http://www.fluka.org/fluka.php?id=course&sub=program&navig=2&which=demokritos2009
>
> to check the spectrum at the target entrance, I used an USRBDX detector,
> then multiplied the results of *_tab.lis by the energy intervals and number
> of all photons which had been integrated over all energy ranges. I should
> mention the area of USRBDX detector was blank so it considered 1 cm**2 as a
> default according to fluka manual.
> Finally, I plotted the USRBDX results but it is different from my spectrum.
> I could not find where my wrong is.
> Is it logical whether I expect to get exactly the same spectrum as the main
> one by simulation?
>
> Best Regards
> Hamideh
>
> PS, the input, source.f and flux.dat are attached.
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Received on Tue Feb 24 2015 - 11:52:42 CET