CVD diamond is used as a radiation detector for medical and high energy physics applications. Major fields of application include medical dositry, neutron detectors, UV laser systems and X-ray and gamma detection.
HIGH purity synthetic CVD Diamond presents unique characteristics that make it an excellent material for radiation detection.
Diamond can detect any kind of radiation that is more energetic than its bandgap of 5.5 eV, e.g., deep UV photons, x-rays, gamma rays, charged particles and neutrons with a dynamic range in energies spanning from 5.5 eV up to GeV of cosmic rays.
Because of its radiation hardness it needs no frequent replacements. Its high mobility for both electrons and holes equates into a very fast response (rise time < 100 ps). It can be operated at room temperature with no need for cooling. It has a resistivity several orders of magnitude greater than silicon, an extremely low leakage current and a thermal conductivity better than copper.
Characteristics of Diamond Radiation Detectors
- Rise time < 100 ps
- Energy resolution up to 0.4 % (5.5 MeV Alpha particle spectroscopy)
- Time of Flight (TOF) resolution up to 28 ps (1 _ for the correlation between two detector responses)
- Tissue equivalent Radiation Dosimetry (Z=6 ,Low x-ray absorption)
- Radiation Hardness to 14 MeV Neutrons at least up to a fluence of 5*1014 n/cm2 (permanent in-situ placement).
- Excellent thermal and mechanical properties.
- Compact, UHV compatible.
- High spatial resolution.
- Homogenous (no grain boundaries).