Dear User
Fluka does not have exactly the same "forced collision" feature as Phits
and/or Mcnp6, but it has a very similar option allowing to shorten at will
the interaction length for all particles, or only some, for all
generations, or only for primaries, for all materials, or only some.
This is the LAM-BIAS option, please look at the description in the manual.
Alfredo
> Dear fluka experts:
>
> do fluka have variance reduction tecnique of forced collision like in
> mcnp or phits?
>
> the tecnique like below:
>
> The forced collisions are used for improving tally statistics or thin
> target analysis by enlarging the collision
> probabilities. When specified particle comes into a region defined as the
> forced collision region, the particle is
> divided into two particles. One has a weight by (penetration probability)
> × (its weight), this particle pass through
> to the next region. The other has a weight of (1 - penetration
> probability) × (its weight), and it is forced to collide
> with a target in the region. The collision point is randomly determined
> according to cross sections. Regions and
> factors for the forced collisions can be defined in this section.
> Non-defined regions are set factor zero.
>
>
> if fluka have, how shauld i do?
>
>
>
>
> with best regards!
__________________________________________________________________________
You can manage unsubscription from this mailing list at
https://www.fluka.org/fluka.php?id=acc_info
Received on Mon Jan 25 2021 - 21:23:35 CET