question to material in geometry

[Elke-Caroline Aschenauer <elke@jlab.org>]

Dear Richard,

I have a small question to the material in the geometry file.

For the FCal beam hole do you have any material in there. Of course I mean
not completely filled but some frame/tube is needed to support the blocks.

One other question on the performance wit hthe detector is if we would
put a helium bag going from the end of the FDC through the empty cerenkov
space to the tof, through the fcal to the photon beam dump.

I can add this 2 items concerning geom-file on the wiki.

cheers elke



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