Dear Fluka experts,
I wanted to calculate the energy deposition in a graphite cylindrical
target due to an axial proton beam. I've used the USRBIN card, asking
for ENERGY and selecting the cylinder region. The beam is originated in
the core of the target and it is completly stopped by the graphite:
there is no particle loss outside the cylinder. However, I have noticed
a sort of 'energy loss' in the results, and this loss increases as the
beam energy increases:
* Proton beam energy: 0.7 MeV --> Energy deposition: 0.699W --> %
difference: 0.001%
* Proton beam energy: 40 MeV --> Energy deposition: 39.65W --> %
difference: 0.8%
* Proton beam energy: 70 MeV --> Energy deposition: 68.62W --> %
difference: 2%
* Proton beam energy: 150 MeV --> Energy deposition: 142.2W --> %
difference: 5.5%
How can this be explained? Am I missing something?
Thanks for your help!
Best regards,
Lisa
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Received on Thu Jul 22 2021 - 20:40:49 CEST