Dear Nima
In principle you can play Russian Roulette on photons entering your region
of interest with a combination of BIASING cards, e.g. see the example in
the Manual at the bottom of the card description. However, I am not sure
about whether there is an internal protection on excessive roulette as
there is on splitting going the other way.
Alternatively, you could define a very thin region(s), e.g. of air
adjacent to the vacuum, where you kill photons with EMFCUT.
Cheers
Stefan
___________________________________
Stefan Roesler
CERN, HSE-RP
CH-1211 Geneva 23
Switzerland
Phone: +41-22-7679891
Fax: +41-22-7669639
E-mail: Stefan.Roesler_at_cern.ch
On Sat, 12 Jan 2019, Nima Ghal-Eh wrote:
> Dear FLUKA experts,
>
> I would like to write a FLUKA input for my problem in which the transport
> of gamma rays in a given region must be switched off.
>
> In MCNP code, for example, this can be done by setting the so-called
> gamma-ray importance as zero. I know that using EMFCUT card, one can
> define the gamma ray transport threshold, however, it seems that this
> card cannot be used for an empty region (i.e., VACUUM). Could you please
> help me how to resolve this? Is there any simple option to set the
> particle weight (or importance) in a region with/without material?
>
> Thank you very much in advance for your considerations,
>
> Best regards,
> Nima Ghal-Eh.
>
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Received on Mon Jan 14 2019 - 14:17:48 CET