OPTICS MEASUREMENTS IN DAΦ NE

In the two rings of the DAΦ NE collider the presence of two Interaction Regions and of the experimental solenoid and the absence of periodicity make the assessment of the linear optics a challenging issue. Due to the low integer part of the tune, matching of the interaction parameters, emittance tuning or movements in the tune diagram always involve the whole ring optics: the collider model is therefore a critical tool to control luminosity. The Response Matrix is extensively used in the operation for closed orbit correction, localized bumps and especially in restoring the optimum luminosity conditions on the reference orbit. The Response Matrix information is also exploited for coupling analysis. Measurements on transverse space dynamic tracking are finally reported.