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X-ray cluster emission has been observed mainly in clusters with "inactive"cD galaxies (L_bol ~1E40-1E43erg/sec), which do not show signs of accretiononto a SMBH. Our recent Chandra discovery of ~100kpc scale diffuse X-rayemission revealed the presence of an X-ray cluster associated with the radioloud quasar 3C186 at redshift z=1.1 and suggests interactions between thequasar and the cluster. In contrast to the majority of X-ray clusters the 3C186cluster contains a quasar in the center whose radiative power alone exceedsthat which would be needed to quench the cluster cooling. We present theChandra X-ray data and new deep radio and optical images of this cluster. The3C186 quasar is a powerful Compact Steep Spectrum radio source expanding intothe cluster medium. The 2arcsec radio jet is unresolved in the Chandraobservation, but its direction is orthogonal to the elliptical surfacebrightness of the cluster. The radio data show the possible presence of oldradio lobes on 10 arcsec scale in the direction of the radio jet. We discussthe nature of this source in the context of intermittent radio activity and theinteraction of the young expanding radio source with the cluster medium.

Evolution of a Powerful Radio Loud Quasar 3C186 and its Impact on the Cluster Environment at z=1