  We give an experimental demonstration of two types of recently proposed
ventilator apertures which can be used to acquire electron magnetic circular
dichroic (EMCD) signals in zone axis orientation with high spatial resolution.
To simplify the experimental procedures, we propose a third type of aperture
and experimentally demonstrate the use of this modified ventilator aperture for
the case of multiple symmetries in the diffraction patterns. To show the
feasibility of the atomic resolution EMCD, EMCD signals are acquired for a
range of beam convergence angles. High quality EMCD signals with convergence
angles corresponding to atomic resolution electron probes are obtained.
