pipe_v22a is designed to be compatiable with psd_v22a
has a 12AGeV beam with 100% magnetic field.

pipe_v22b is compatiable with psd_v22b whcih is a 3.3AGeV
beam with 60% magnetic field.

This  geometry combines the work of several beampipes.
For the upstream section a window section and STS section.
A sts flange from sts_v21f geometry. A taget box from sts_v21h geometry.
The wide conical section, bellows, are from beampipe v21e and v21f geometries.

The downstream section is set by specifying the position of the psd.