Date: Thu, 26 May 2016 05:40:07 +0000
Dear FLUKA experts,
I noticed that USRBIN (dose) gives slightly different result depending on the grid chosen: Cartesian or Cylindrical.
the target is a cylinder (r=10, l=30 cm) inside a vacuum void.
I do understand that when I choose Cartesian grid, some of the void region in the corners gets included and affects the result but it doesn't explain why deviation is large near the front and decreases with a depth of the target:
[cid:13b5bd43-9c12-4e8a-87c9-66ccd11266e6]
and more importantly, why it is cartesian grid that yields better fit with OLTARIS result?
I am trying to compare FLUKA output with result from this paper:
https://www.researchgate.net/publication/270595107_Shielding_evaluation_for_solar_particle_events_using_MCNPX_PHITS_and_OLTARIS_codes
specifically fig.9 (bottom right)
here are my scoring cards:
USRBIN 11. DOSE -25. 10. 35.CYLINDRICAL
USRBIN 0.0 3.7 1. 1. 300. &
USRBIN 10. DOSE -32. 10. 10. 35.CARTESIAN
USRBIN -10. -10. 3.7 1. 1. 300. &
3.7 is a thickness of aluminum shield.
thank you,
Roman
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