From: Sebastien WURTH (
Date: Fri Oct 12 2007 - 16:38:07 CEST

  • Next message: Alberto Fasso': "Re: USRBIN & USRTRACK"

    Hello Sujoy,

    First thing, a minor question : do you really want to apply your EMFCUT
    specifications only to materials 2.0 to 7.0 ?
    EMFCUT assignment is not done by regions, but by materials.

    I ran FLUKA with your input.

    Result for usrtrack with ustsuw treatment and multiplied by the energy
    bin : 1,41*10e-4 photons/cm²/incident photon
    Result for usrbin with usbsuw and pawlevbin treatment : ~10e-3
    photons/cm²/incident photon

    The two methods give tracklengh fluence (cm/cm3/primary), but not the
    same results, it is true.

    It depends on what you wanna calculate : the total fluence (or the
    fluence versus energy bins in case of several energy bins)
    in a given region (usrtrack) or the "spatial" (easily plotted with the
    associated tools) fluence in a binning of your choice (usrbin).

    Here, since you want to score what happens in your detector (this is
    what I assumed), aka a defined region, I would rather use USRTRACK.

    Hope it helps.

    Sebastien. wrote :

    >Dear Fluka experts,
    >I am asking a silly question, but may be because of my understanding. If I want to score Photon fluence, which card I should use - USRBIN or USRTRACK ? If I understand well, both these cards should give same result, USRBIN and (USRTRACK * Energybin). But in my simulation, these are not the same. I am sending the input file for reference.
    >With Regards,
    >S. Chatterjee
    >Scientific Officer,
    >TLD Unit, BARC
    >Variable Energy Cyclotron Centre,
    >1/AF, Bidhannagar,Kolkata-64

  • Next message: Alberto Fasso': "Re: USRBIN & USRTRACK"

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