Date: Thu, 26 May 2016 10:41:28 +0200
*an update to my previous email*
The normalization for USRBIN output when asking for DOSE is 1.6e-7 mJ/GeV
and not volume!
Here is the quote from the FLUKA manual:
"5) Energy deposition will be expressed in GeV per cm3 per unit primary
weight. Doses will be expressed in GeV/g per unit primary weight. To obtain
dose in Gy, multiply GeV/g by 1.602176462E-7"
And thanks to Francesco for pointing it out.
Cheers,
Nikhil
On Thu, May 26, 2016 at 7:40 AM, Roman Savinov <rsavinov_at_calpoly.edu> wrote:
> 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:
>
> 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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