Position-sensitive radiation detectors made of single crystal CVD diamond

✍ Scribed by Pomorski, M. ;Ciobanu, M. ;Mer, C. ;Rebisz-Pomorska, M. ;Tromson, D. ;Bergonzo, P.

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 459 KB
• Volume: 206
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200982229

✦ Synopsis

Abstract

Based on a single crystal chemical vapour deposition (scCVD) diamond plate a position sensitive detector [position sensitive detection position sensitive detector (PSD)] has been fabricated. The ∼9 mm^2^ sensing area of the detector consists of a diamond‐like carbon (DLC) thin film, in the form of a plane‐pad resistive electrode layer deposited on the scCVD surface. The 1D position information is obtained from the resistive charge division between two collecting electrodes located at the extremities of the DLC sensing electrode. The detector properties have been tested using a ^241^Am α‐particles source. The timing characteristics of the device were probed using broad‐band (BB) electronics: the signal formation does not exceed 30 ns, thus detector operation with a negligible ballistic effect is possible at high rates approaching 10^7^ particles/s. The linearity and position resolution of the device was measured using low‐noise charge‐sensitive (CS) electronics: the position resolution reaches 30 µm (σ), the deviation from linearity remain below 2% in the full range of the detector sensing area.