Re: Clarification of DOSE-EQ units in a USRBIN estimator

Dear Mina

USRBIN scoring of fluence is in units of particles/cm2 per unit primary
weight. Here, region-dependent scoring needs either volume input or
off-line division by the volume by the user. Note, that FLUKA internally
scores track-length (cm/primary) and only the division by the scoring
volume (automatically for region-independent meshes, by the user in case
of region-dependent scoring) gives fluence (=track-length density).

Scoring of DOSE-EQ means (on-line) folding of fluence with conversion
coefficients that carry the unit pSv*cm2. Thus, the output of
USRBIN/DOSE-EQ is in units of pSv per unit primary weight
(/cm2/primary * pSv*cm2)

As you correctly mention, if USRBIN scoring refers to residual radiation
(irradiation profile defined and scoring assocciated with a cooling time)
all quantities are rates, i.e. fluence rate (particles/cm2/s) or dose
equivalent rate (pSv/s).

Cheers
Stefan

On Thu, 12 Apr 2012, Mina Nozar wrote:

> Dear FLUKA users, can someone confirm whether the following statements are correct?
>
> - USRBIN scoring (spacial binning)
> pSv/cm^3*prim - with no IRRPROF card
> pSv/cm^3*sec - with an IRRPROF card
>
>
> - USRBIN scoring (region binning)
> pSv/prim - with no IRRPROF card and with no volume input for the given in the geometry section)
> pSv/sec - with an IRRPROF card and with no volume input for the given in the geometry section)
>
>
> pSv/prim - with no IRRPROF card and with the region volume given in the geometry section)
> pSv/sec - with an IRRPROF card and with the region volume given in the geometry section)
>
>
> So regardless of whether region volumes are given in the geometry section, units are pSv/prim or pSv/sec in the region
> binning? This is how I interpret the manual under USRBIN:
>
>
> 13) The results from USRBIN are normalised per unit volume and per unit
> primary weight, except for region binnings and special user-defined
> binnings, which are normalised per unit primary weight only, for
> DPA, which are given as number of displacements per atom per unit
> primary weight, averaged over the bin volume, and for dose <==============
> equivalent, expressed as pSv per unit primary weight. <==============
> In case symmetries are requested, proper rescaled volumes are taken
> into account for normalisation (that is, an extra factor 2 is
> applied to the volume if symmetry around one plane is required, 8 if
> the symmetry is around the origin)
>
>
> Thank you for the clarification,
> Mina
>
>
Received on Mon Apr 16 2012 - 09:28:48 CEST