We wish to investigate of the dimer kagome antiferromagnet Ca3Cr2O8. This material consists of kagome bilayers of spin-1/2 Cr5+ ions. The ferromagnetic intrabilayer interactions pairs these ions into effective spin-1 objects, which are then coupled antiferromagnetically within the kagome plane. Our previous zero field measurements using IN14 and the flatcone analyser revealed broad diffuse magnetic excitations in the kagome plane. No correlations were observed perpendicular to the plane suggesting highly two-dimensional magnetism. Here we wish to extend our exploration of Ca3Cr2O8 to investigate the magnetic excitations as a function of magnetic field. Our specific heat measurements revealed a rich sequence of crossovers as a function of field up to saturation at 12T and we plan to investigate how the excitations evolve with field and the nature of these different phases.