Re: [fluka-discuss]: Energy-scoring per region and R-Phi-Z using USRBIN

From: Mikhail Polkovnikov <pmk_at_ihep.ru>
Date: Wed, 20 Jul 2016 17:49:50 +0300

On 20.07.2016 15:45, Kilian Baumann wrote:
> Dear all,
>
> scoring the energy in an air-filled cavity in a waterphantom
> irradiated by a 1.25 MeV photon beam I habe encountered an interesting
> problem: Using the USRBIN-card one can score the energy either in the
> region (called "chamber") or use the R-Phi-Z geometry that exactly
> matches my region called "chamber". So since I am scoring the energy
> in the same region (in different ways concerning my USRBIN) I should
> get the same results. However the results are different: 4.64538e-10
> GeV pm 0.0290214% for the region-scoring and 5.15530840E-10 GeV pm
> 3.25998449% for the R-Phi-Z-scoring.
> Do you have an idea why this is so? Especially concerning the
> statistics that are quite different?
> In the attachment you can find my input-file.
>
> Best regards,
> Kilian


Dear Killian,

I suppose when you request region-scoring you have to normalize to
volume of your region (0.9047786 cm^3), because ENERGY is normalized
(GeV/cm^3 per primary).

You can use the third way to check the result: in output file "Events by
Region - Energy density" column, but you should set volume of the
chamber into REGION card.

Energy scoring: 4.64538e-10 GeV per primary (in region) or
5.15530840E-10 GeV/cm^3 per primary (R-Phi-Z).


Best regards,
Mikhail


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Received on Wed Jul 20 2016 - 18:09:27 CEST

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