After the magnets arrived we started a measurement of the magnetic field between the pole shoes. This was done by using a Hall probe attached on a translation stage.
The first image shows the results of a simulation, done with the help of Thomas Mouille. The second image shows the results from the real measurements (not the complete area was measured). Both graphs are normalized on the center value and use the same scale. The results show that the field is even more homogeneous than was predicted in the simulations!