special beams in FLUKA

Dear all,
 
I want to perform a few simulations with special beams and I was wondering
if perhaps someone has already done this before and modified her/his
source routine in a very similar way than I would need to.
 
In one of the simulations I would like to have a beam made of
concentric rings. Each ring has a different particle density.
 
In another simulation I want to be able to have two different
beams of different particles in the same run. And I also wonder
if it is possible to have ellipsoidal rings instead of circular ones.
 
If anyone has already made source routines to achieve what I describe
above I would be really grateful if they would allow me to use them.
Otherwise I bet I will send more emails to this group asking for clues
on how to do what I intend to. I am also trying to make sense of the
'how to modify the source routine' lecture.
 
Thanks for your time,
 
  Luis
Received on Sat Nov 22 2008 - 17:31:52 CET