  We describe a new experimental setup for the detection of magnetic circular
dichroism with fast electrons (EMCD). As compared to earlier findings the
signal is an order of magnitude higher, while the probed area could be
significantly reduced, allowing a spatial resolution of the order of 30 nm. A
simplified analysis of the experimental results is based on the decomposition
of the Mixed Dynamic Form Factor S(q,q',E) into a real part related to the
scalar product and an imaginary part related to the vector product of the
scattering vectors q and q'. Following the recent detection of chiral
electronic transitions in the electron microscope the present experiment is a
crucial demonstration of the potential of EMCD for nanoscale investigations.
