Radiation damage of polycrystalline diamond exposed to 62 MeV proton beam

We irradiated two diamond detectors with 62 MeV energy proton beam up to an integrated fluence of about 10$^{16}$protons/cm$^{2}$ at INFN-LNS in Catania (Italy). The detectors were made by two high purity poly-crystal diamond sensors. The electric contacts of the two diamond sensors were from different sources and made with different techniques: a proprietary DLC/Pt/Au electric contact and our own novel UV Laser technique. We measured the detector pulse height before and after irradiation using the same proton beam with reduced intensity. The radiation damage was than quantified in terms of charge collection distance as measured with a beta source. Finally, the degradation of the global detector time performance due to the reduced signal was evaluated comparing the time dispersion between the two detectors placed on the beam before and after irradiation