Dear Karolina,
take care about the surface/volume normalizazion: USRBDX is a boundary
crossing fluence estimator and what(6) in USRBDX indicates the area of your
detector in cm^2, while USRTRACK is a track-length fluence estimator in the
volume of your detector. You have to provide this volume, in cm^3, via
what(5) in the first line of the card.
You gave in the two cases the same number, and this is evidently wrong.
Also, why 100.? If the size of the cube is 0.01 cm as you wrote, you should
use what(6) = 1.E-4 in USRBDX card, and what(5) = 1.E-6 in USRTRACK card.
Hope it helps,
regards,
Anna
Am Fri, 12 Aug 2016 09:24:49 +0000 schrieb Karolina Kokurewicz
<karolina.kokurewicz_at_strath.ac.uk>:
> Dear FLUKA experts,
>
> I've noticed that graphs have not been attached. Please see them in the
>separated files.
>
> Thank you,
> Karolina
> ___________________________
>From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on
>behalf of Karolina Kokurewicz [karolina.kokurewicz_at_strath.ac.uk]
> Sent: 11 August 2016 19:03
> To: fluka-discuss_at_fluka.org
> Subject: [fluka-discuss]: USRTRACK vs. USRBDX
>
> Dear FLUKA experts,
>
> I'm scoring energy spectra of photons, emitted by 200 MeV electrons focused
>in water. I'm particularly interested in photons at 20 cm depth. For that I
>defined 0.01 cm thin volume within water cube by using XYP plane. To score
>energy of photons I chose tabs USRTRACK with AUXSCORE for that volume. The
>results I've got are fine however I wanted see if USRBDX will give me the
>same spectra. I specified boundaries to cover the same region as in USRTRACK
>(also I added AUXSCORE command to score exatly energy of photons). The
>results I normalized (according to manual) as follows:
>
> USRTRACK = Y(axis) * energy bin (I get rid of 'per GeV')* number of
>particles (I get rid of 'per primary'), so I get fluence in cm^{-2}
>
> USRBDX = Y(axis)* energy bin*2pi (because I requested one way scoring)
>*number of particles.
>
> The results I've got are:
>
> USRBDX 1. ENERGY -34. TARGET TARGET6
> 100.usrbdx_his
> USRBDX 0.2 0.1 200. 0.0 1. &
>
>
> [X]
>
>
> USRTRACK 1. ENERGY -30. TARGET6 100.
> 400.histogram6
> USRTRACK 0.2 0.1 &
>
>
> [X]
>
>
> I would like to ask how can I explain difference between these two spectra?
>I have noticed that whenever I change the thickness of my volume fluence
>increases in USRTRACK. So how thick should be my scoring volume to get the
>same results as for USRBDX?
>
> Thank you,
> Karolina
>
>
> __________________________________________________________________________
> You can manage unsubscription from this mailing list at
>https://www.fluka.org/fluka.php?id¬c_info
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Anna Ferrari
Institute of Radiation Physics
Helmholtz-Zentrum Dresden-Rossendorf e.V.
Tel. +49 351 260 2872
a.ferrari_at_hzdr.de
http://www.hzdr.de
Vorstand: Prof. Dr. Dr. h. c. Roland Sauerbrey, Prof. Dr. Dr. h. c. Peter
Joehnk
Vereinsregister: VR 1693 beim Amtsgericht Dresden
__________________________________________________________________________
You can manage unsubscription from this mailing list at
https://www.fluka.org/fluka.php?id=acc_info
Received on Fri Aug 12 2016 - 15:13:42 CEST