# Re: surface source

From: Sebastien WURTH (wurth@ipno.in2p3.fr)
Date: Tue Apr 24 2007 - 15:17:50 CEST

• Next message: Valery Taranenko: "RE: what is subroutine SFLOOD?"

Hello,
They are many ways :
1) To obtain a circular surface source it is simple : you can do it
inside BEAM card without source.f by giving the proper values to WHAT(4)
and (5) with WHAT(6) < 0 (see manual).
2) For a spherical source you can use source.f by calling the RACO
subroutine see
http://www.fluka.org/frequentlyAQ/Functions,_subroutines_and_Fortran_programming.html
You got three random numbers TXX, TYY, TZZ such that TXX**2 + TYY**2 +
TZZ**2 = 1D+00
In source.f you assign XBEAM = TXX, YBEAM = TYY, ZBEAM = TZZ for
example. This gives you a spherical distribution with "radius" 1 cm (on
every projection (x,y), (x,z), (y,z)) and center 0,0,0.
You can also take a look in the user routines chapter of the fluka
manual section source to see other applications of sampling.

Hope it helps.

Regards.

Sebastien.

fanoos wrote :

> Dear FLUKA users
>
> I want to simulate a circular surface source by fluka.I know I should
> use source.f but I don't know how I can sample such a source in source.f.
> How can I simulate a volume source?
> Could you do me a favor by your help?
>
> Regards
> Fanoos
>
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• Next message: Valery Taranenko: "RE: what is subroutine SFLOOD?"

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