RE: [fluka-discuss]: RE: USRTRACK vs. USRBDX

From: Karolina Kokurewicz <karolina.kokurewicz_at_strath.ac.uk>
Date: Fri, 12 Aug 2016 13:43:19 +0000

Dear Anna, Thank you for your advice. I double checked if volume in USTRACK and area in USRBDX are right. Definitely I should give more details about my volume and I misled you saying 'cube' (the whole water tank was originally a cube). This is cuboid 10 cm long on x, 10 cm long on y and 0.01 cm long on z. Therefore for USRTRACK I used 1 cm^{3} for volume and 100 cm^{2} for area in USRDBX. The beam propagates along z axis. After the run I scored fluence that varies by more than one order of magnitude between these two graphs. I attached input file with plots of spectra. I'm using user routine source.f to create focused beam. Thank you, Karolina ________________________________________ From: Anna Ferrari [a.ferrari_at_hzdr.de] Sent: 12 August 2016 13:21 To: Karolina Kokurewicz; fluka-discuss_at_fluka.org Subject: Re: [fluka-discuss]: RE: USRTRACK vs. USRBDX ...just to be more precise with the number: I wrote that it should be what(6)=1.E-4 in USRBDX card considering as boundary one side of a cube of 0.01 cm size (since you did not send the input file - thing that is always recommended - it is not clear to me if this is exactly your geometry). If not, you have in any case to provide a detector surface in USRBDX and a detector volume in USRTRACK, as I wrote in the previous email. Note that the quantities can vary a bit accordingly with the estimator: in the USRTRACK case you obtain the track-length density distribution normalized to the detector volume (= the fluence averaged over the whole volume), while in the USRBDX case the average fluence through (a parte of) its surface. 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


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USRBDX.png
(image/png attachment: USRBDX.png)

USRTRACK.png
(image/png attachment: USRTRACK.png)

Received on Fri Aug 12 2016 - 17:18:35 CEST

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