We present LOFAR data from 110–180Â MHz of the merging galaxy cluster Abell 1682 , alongside archival optical , radio and X-ray data .
Our 6 arc-second resolution images at low frequencies reveal new structures associated with numerous radio galaxies in the cluster .
At 20 arc-second resolution we see diffuse emission throughout the cluster over hundreds of kpc , indicating particle acceleration mechanisms are in play as a result of the cluster merger event and powerful active galactic nuclei .
We show that a significant part of the cluster emission is from an old radio galaxy with very steep spectrum emission ( having a spectral index of \alpha < -2.5 ) .
Furthermore we identify a new region of diffuse steep spectrum emission ( \alpha < -1.1 ) as a candidate for a radio halo which is co-spatial with the centre of the cluster merger .
We suggest its origin as a population of old and mildly relativistic electrons left over from radio galaxies throughout the cluster which have been re-accelerated to higher energies by shocks and turbulence induced by the cluster merger event .
We also note the discovery of six new giant radio galaxies in the vicinity of Abell 1682 .