In this paper we have reported the first observation of charge multiplication in single crystalline diamond detectors. The single crystalline CVD diamonds were metallized with different patterns aiming to increase the electric field at the electrode and possible impact ionization. That would lead to improved signal-to-noise ration and sensitivity of the sensors in a similar way as for silicon detectors (Avalanche Photo Diode). If a small circular electrode was used the charge multiplication was observed as a rise of the leakage current and also in signal from 90Sr electrons. A precise specific ionization for the latter was also measured in the work. However the required bias voltages were too high for the use in medicine.
COBISS.SI-ID: 30259751
The rights to exploit and market the readout systems and accompanying software developed at JSI were transferred to the company Particulars Ltd. Some solutions in the circuitry for precise current measurements are such that they may require a patent protection. The latter will be filed, if required, upon the discussion with patent commission.