Below is the scan of the existing (as they exist in our software geometry package - 2019a) structures inside the r = 50 cm along the beamline, in the z region of [40, 160] cm.
The quoted fraction of the radiation length (in one two dimensional plot) is for the material as seen by the track traversing the medium perpendicular to the beamline at the given z.






I also provide a two dimensional (tomography) image in ZY plane for reference, color axis is the fraction of the radiation length.




To explain what is going on on the plot above, I provide the geometrical plots below (color here is just a different element). Plot is interactive, you can zoom or hover the mouse for details.



Below is the beam pipe volume geometry as it is in STAR AgML: