Properties comparison between nanosecond X-ray detectors of polycrystalline and single-crystal diamond

Although natural and artificial diamond materials can be used in X-ray detection, single-crystal diamond (SCD) is rare and costly yet polycrystalline diamond (pCVD) is cheap and can be fabricated with large sizes. Presently it is difficult to predict which one may find wider applications in fast pulsed X-ray detection. In this paper, two nano-second diamond detectors with similar size based on CVD diamond material were fabricated, then the temporal response to ultra-fast pulsed X-ray were tested and compared. It can be concluded that both single-crystal and polycrystalline diamond devices perform well in fast pulsed X-ray detection with no significant difference. As a result, polycrystalline diamond devices have larger applications in fast pulsed X-ray detection than the single crystal ones for their large area, low cost and good properties in radiation detection.99