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We search for extended regions of radio emission not associated with ActiveGalactic Nuclei, known as 'relics', 'halos' and 'mini halo's, in a sample of 70Abell clusters for which we have radio, optical and X-ray data. AGN can produceparticle bubbles of non-thermal emission, which can restrict cosmic rays. Henceradio relics and (mini) halos could be forming as a result of the confinementof cosmic rays by these bubbles. We are probing the role that intracluster mag-netic fields (using Faraday rotation measure and inverse compton arguments),mergers (through radio/X-ray interactions), cooling flows (X-ray data), radiojets/shocks as well as radio (mini) halos/relics play in the formation,acceleration and propagation of cosmic rays. For the current study we haveselected two powerful nearby radio galaxies from our sample: Hercules A and 3C388. We report on the work in progress and future plans.

Searching for radio relics and halos. Their role in the formation and acceleration of extragalactic cosmic rays