Dear Tamer,
Almost all FLUKA estimators (usrbin, usrbdx etc) give results
normalized per primary particle.
Thus, they do NOT depend on the number of cycles, nor on the number of
primaries in the START card.
Regards
Paola
> Dear fluka experts,
>
> In my "usual" fluka simplified model, usbrea.inp, I am scoring the
> energy in a specified region, which was hit by a proton beam. Then I am
> using usbrea code to export the integrated energy deposited in this
> region for different beam intensities.
>
> The problem: I realized that, for a fixed beam energy, increasing the
> number of runs, hence the number of primaries/beam intensity, does NOT
> change the value of the integrated energy deposited in the target volume?!
>
> Attached, you will find:
>
> - usbrea_3Runs_98.bnn file: integrated binary file using flair, for 3
> Runs (each of 1000 primaries, i.e. 3000 pot).
>
> - usbrea_10Runs_98.bnn file: integrated binary file using flair, for 10
> Runs (each of 1000 primaries, i.e. 10000 pot).
>
> - Edep_3Runs.txt file: formatted file for the integrated deposited
> energy in the specified region, generated by applying usbrea code on
> usbrea_3Runs_98.bnn.
>
> - Edep_10Runs.txt file: formatted file for the integrated deposited
> energy in the specified region, generated by applying usbrea code on
> usbrea_10Runs_98.bnn.
>
> As you can see, whether integrate over 3 runs or 10 runs, the total
> deposited energy, in the two txt file, is same in the target volume! Is
> the integrated deposited energy in a volume is independent of the
> intensity of the incident radiation? Or I misunderstand some physics?
>
> Regards,
>
> Tamer
>
> --
> Dr. Tamer Tolba
> Forschungszentrum Jülich
> Institut für Kernphysik (IKP)
> 52425 Jülich, Germany
> Tel.: +49 2461 61 6860
> Fax.: +49 2461 61 96415
>
>
>
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>
>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Sun Mar 22 2020 - 15:52:39 CET