Re: source and number of primaries

From: Florian (florian.sommerer@cern.ch)
Date: Fri May 25 2007 - 17:33:18 CEST

  • Next message: Tang, Alfred: "RE: Thermal and epithermal neutrons--more questions"

    Dear Hamide Jalali,

    you have simply a typo in your source routine:
    in line 228 you wrote VXXX instead of VYYY.

    When you use VYYY later it is zero and the direction cosines are not
    normalized anymore.

    Regards,
    Florian

    hamide jalali wrote:
    > Dear FLUKA user
    >
    > I have programmed a source.f which is included SFLOOD subroutine to
    > generate an isotropic and uniform fluence (cosmic ray).I have defined a
    > spherical target as well.The radius of target is 400cm and the radios of
    > source is 401 cm (very near to target ).If I request more than 2000
    > primary histories,running will crash in second cycle and by this number
    > of primaries the result has a big error (more than 40%) even I consider
    > 200 primaries with 10 cycles (increasing the number of cycles didn't
    > change the error).I don't know my assumption about the location of
    > source is incorrect or the problem is because of FLUKA.Please guide me.
    > Any help will be appreciated.
    > PS, my input and source.f are in attachment.

    -- 
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    Florian Sommerer
    European Organization for Nuclear Research
    CERN DSU/TT
    Mailbox Z08700
    Geneve 23
    CH-1211 Switzerland
    Tel : +41 2276 75582
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  • Next message: Tang, Alfred: "RE: Thermal and epithermal neutrons--more questions"

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