matthias hoener, a phd student in möllers group, made this draft.
-it is a tube (not square) chamber: better for pumping, cheaper, stands the 1atm vs. high vacuum force better.
-it has the advantages of the square chamber:
1) square removable top providing good access.
2) with the two supports with (not included in the drawing) windings, experiments on a base can easily be mounted.
-viewports can be mounted on reduction flanges on the front and back.
