The meaning of fluence is not proprietary to Fluka, but it is explained in
detail in several threads of the fluka discuss list, a good example being:
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/0543.html
And yes, if you score the density of track lengths over a volume you
obtain fluence in that volume. To do that you would have to count the
lengths of trajectories of particles within a given energy that cross that
space and divide by the corresponding volume. Thus you would get cm/cm^3 =
cm^-2
On 6/7/16, 11:09 AM, "owner-fluka-discuss_at_mi.infn.it on behalf of
mjm_at_jlab.org" <owner-fluka-discuss_at_mi.infn.it on behalf of mjm_at_jlab.org>
wrote:
>I'm a graduate student working with Fluka for the first time, and I'm
>having some difficulty understanding the units for fluence used in
>scoring, specifically for the USRYIELD card. I've found that this is in
>units of cm^-2 GeV^-1 srad^-1 per primary particle; I understand the srad
>part, since we're scoring across an angular distribution, and I understand
>the GeV part, since we're scoring in bins, but I'm stuck on the cm^-2
>part.
>
>So for USRBDX, you're specifying an interface that you're scoring across,
>so it's fairly clear what area you're using to find the fluence. But with
>USRYIELD, you're scoring across a solid angle, so the area depends
>entirely how far away from the target you are, and yet there is no
>"radius" field for USRYIELD. How far away is USRYIELD scoring from the
>target? Or am I missing something here? I did find something that cm^-2
>is shorthand for cm / cm^3, standing for tracklength per volume, but I'm
>not sure I really understand that either.
>
>Any help would be great, thank you.
>
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Received on Wed Jun 08 2016 - 01:22:23 CEST