p-CVD diamond heavy-ion beam detector with integrated electronics

For the new ToF Barrel of FOPI, [1], a new beam detector based on polycrystalline-CVD diamond was developed. The new device replaces the existing beam monitoring system which comprise a ToF Start detector and a beam-halo detector, both built from plastic scintillator material. However, since the employed diamonds are not sensitive to minimum ionizing particles the new device can be used efficiently only for heavy-ion beams. The layout of the detector foresees a single electrode for a start signal in the center and four adjacent electrodes to facilitate the focusing of beam and to serve as an additional beam-halo detector (see Fig. 1). The size of the electrodes was optimized such that