Hi Mark,
the USRBIN method is certainly preferable, but please remember that in
this case the region volume normalization, which is needed to get actual
dose values, is up to you at post-processing level, since the volumes you
input in the Flair region cards are considered by FLUKA only to the
purposes of the normalization of the output table you looked at yesterday,
as produced by the ancient SCORE command.
See also the recent thread
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/10023.html
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/10024.html
Cheers
Francesco
**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854
On Tue, 21 Mar 2017, mark.ibison_at_cockcroft.ac.uk wrote:
>
> Hello Lefteris,
>
>
>
> Thanks for the confirmation of my understanding.
>
> The derived dose-rates need to be within a factor of 2 or so (hopefully) because they
> are used to predict lifetimes of the cameras which will be located in the tunnel.
>
>
>
> I guess that USRBIN and the FLUKA tools would be much easier than my semi-manual
> method, which involves exporting via text files into EXCEL to analyse multiple runs J
>
>
>
> Regards,
>
> Mark
>
>
>
> From: Eleftherios Skordis [mailto:eleftherios.skordis_at_cern.ch]
> Sent: 20 March 2017 13:20
> To: Ibison, Mark (Liverpool Uni.,DL,-); fluka-discuss_at_fluka.org
> Subject: RE: Region Volumes in Dose calculation
>
>
>
> Hi Mark,
>
>
>
> Indeed the units of the values are given in the header.
>
> The energy density is given in GeV/cm^3/primary and is pretty straight forward when
> the volume of the regions are given.
>
> What might be confusing is the fact that, when you do not put any volume size in the
> region definition the default normalisation of volume is 1 cm^3. Therefore, the
> "energy density", in the default case, corresponds to the (total energy deposited in
> the region)/primary.
>
>
>
> On another note, I would recommend that you use the special USRBIN (region)
> [what(1)=12] to score in binary files the unit of interest (e.g. ENERGY) so that you
> can use the fluka tools to sum up different runs in order to acquire better
> statistics.
>
>
>
> Kind regards
>
>
>
> Lefteris
>
>
> -----------------------
>
> Eleftherios Skordis
>
> Dep. EN/STI, CERN
> CH-1211 GENEVA 23
> SWITZERLAND
>
>
> OFFICE: +41-22-7679541
>
>
> ______________________________________________________________________________________
>
>
> From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of
> mark.ibison_at_cockcroft.ac.uk [mark.ibison_at_cockcroft.ac.uk]
> Sent: 20 March 2017 11:46
> To: fluka-discuss_at_fluka.org
> Subject: [fluka-discuss]: Region Volumes in Dose calculation
>
> Dear FLUKA Users,
>
>
>
> I would like to check my understanding of the way that FLUKA uses Region Volume
> information in the output table of Energy by Region (which I am using to calculate
> Dose by Region).
>
> I have entered volumes (obtained outside FLUKA, from the ¡SimpleGeo¢ program) by means
> of the REGION cards. These values appear correctly in the data column of the output,
> and are used by FLUKA to derive the ENERGY column of the table, as shown in the
> extract below:-
>
>
>
> 1Region # name volume ENERGY Density Star
> Density Star Density Star Density
>
> in cubic cm GeV/cm**3 Stars/cm**3
> Stars/cm**3 Stars/cm**3
>
> /one beam particle /one beam particle /one
> beam particle /one beam particle
>
>
>
> 1 BLKHOLE 3.630000000E+11 6.663278159E-15
> 0.000000000E+00 0.000000000E+00 0.000000000E+00
>
> 2 ENTSPACE 7.853981600E+05 1.160100087E-09
> 0.000000000E+00 0.000000000E+00 0.000000000E+00
>
> 3 GRAPHITE 5.026550000E+03 3.559295749E-05
> 0.000000000E+00 0.000000000E+00 0.000000000E+00
>
>
>
> Previously, before I entered these volumes explicitly, the FLUKA output showed 1 cubic
> cm in the ¡volume¢ column, which I assume was a default value.
>
>
>
> I would just like to confirm that I am following the correct procedure, because the
> Dose values are critical results for my project.
>
>
>
> Thank you.
>
>
>
> Mark
>
>
>
> Dr Mark Ibison
>
> Accelerator Beam Diagnostics
>
>
>
> QUASAR Group
>
> University of Liverpool Dept of Physics
>
> Cockcroft Institute
>
> Daresbury Laboratory
>
> WARRINGTON
>
> WA4 4AD
>
>
>
> Tel. +44 (0)1925 864056
>
> Email: mark.ibison_at_cockcroft.ac.uk
>
>
>
>
>
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Received on Tue Mar 21 2017 - 13:36:51 CET