CVD diamond detectors for ionizing radiation

In future HEP accelerators, such as the LHC (CERN), detectors and electronics in the vertex region of the experiments will suffer 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 x 4 cm(2) have been grown and refined for better charge collection properties, which are measured with a beta source or in a testbeam. A large number of diamond samples has been irradiated with hadrons to fluences of up to 5 x 10(15) cm(-2) to study the effects 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 first diamond pixel detector proved fully functional with LHC electronics. (C) 1999 Elsevier Science B.V. All rights reserved.