CVD Diamond Detectors for IonizingRadiationThe RD 42

In future HEP accelerators, such as the LHC (CERN), detectors and electronics in the vertex region of the experiments will su er from extreme radiation. Thus radiation hardness is required for both detectors and electronics to survive in this harsh environment. CVD diamond, which is investigated by the RD42 Collaboration at CERN, can meet these requirements. Samples of up to 2 4 cm2 have been grown and re ned for better charge collection properties, which are measured with a source or in a testbeam. A large number of diamond samples has been irradiated with hadrons to uences of up to 5 1015 cm 2 to study the e ects of radiation. Both strip and pixel detectors were prepared in various geometries. Samples with strip metallization have been tested with both slow and fast readout electronics, and the rst diamond pixel detector proved fully functional with LHC electronics.