[G12] versions of mc tools

[salgado at jlab.org]

Hi!


The MC (gsim+gpp) simulates the hardware we used in g12 (magnetic
field,geometry,...) and we must be sure that we are
representing that hardware in the MC and, of course, the SAME hardware in
a1c! For example, do different detector libraries represent different
alignment and geometric values, materials, digitization,...? It seems to
me that it will be safer to use the same libraries  (and those
corresponding to the g12 run period)!

Carlos

>   g12ers,
>      Last night I forgot to ask about which version of a1c one should
> use when processing MC. I remember hearing that we should use the pass1
> branch of the SVN repository so we're using the same code to cook real
> data and MC data. However, do we want all MC-related tools to be built
> from the pass1 branch, or just a1c? It seems strange to me to generate
> detector responses with a GSIM linked against one version of detector
> libraries and then reconstruct them with a1c linked against a different
> version of the detector libraries. Perhaps all that matters is that the
> detector libraries themselves are from pass1, since a1c mostly just
> organizes input and output and sets up calls to those libraries. I have
> no idea what GSIM might use the detector libraries for--I just know I
> have to link them to get it to compile.
>
> At present, ~clasg12/local/scripts/sample_gsim_desktop.sh uses tools
> from the clas6 STABLE 32-bit build, which is not what was used for g12
> pass1.
>
> Any thoughts?
>
> --cb
>
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