Spectrometric performances of monocrystalline artificial diamond detectors operated at high temperature

This paper reports about the influence of working temperature on the spectrometric and time dependent performances of single crystal diamond detectors (SCD) operating at temperature up to 200°C and irradiated with alpha particles. Two different types of SCD detectors were studied: a) SCD of commercial type; b) SCD produced at Rome “Tor Vergata” University and characterised by a layered structure. The first measurement of the response functions vs. temperature of the commercial SCD detector irradiated with 14 MeV neutrons and heated up to 140°C is also reported. The measurements pointed out the superior performances of diamond respect to other detectors (e.g. silicon) when operated at high temperature, however the present work also pointed out that a diamond detector assembled to operate at room temperature can suffer of mechanical and electrical stress. The results indicate that with a proper design diamond detectors can be suitable for operation at high temperature.