Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 12: Instrumentation 4
HK 12.5: Vortrag
Montag, 23. März 2015, 18:15–18:30, M/HS1
Development of large area diamond detectors for time of flight measurements of heavy ions — •Fabio Schirru1, Chiara Nociforo1, Mladen Kiš1, Jochen Frühauf1, Mircea Ciobanu2, Michael Träger1, and Robert Visinka1 — 1GSI, Darmstadt, Germany — 2ISS, Bucharest, Romania
The interest in using diamond for radiation detection applications stems from its unique properties. In particular, radiation hardness, low leakage current (no need of cooling), fast rise time of the induced signals (in the order of 100 ps) and high electron/hole saturation velocity (up to 107 cm/s) make it an excellent candidate for serving as a high-resolution timing detector.
We present the Time of Flight (ToF) properties of new developed radiation detectors based on two 20x20 mm2 and 0.3 mm thick polycrystalline diamonds. Electrodes were fabricated in house at GSI by depositing on both sides of the diamond samples Cr/Au layers of thickness 50/100 nm respectively.
Strip diamond detectors, irradiated with 197Au beam at 1 GeV/u and coupled with integrated electronics, showed very good timing performances of ∼50 ps over a particle path of flight of ∼34 m. It is the first time that timing properties of diamond sensors are evaluated at experimental conditions very similar to those expected at the in-flight separator Super-FRS[1], under construction at FAIR.
- M. Winkler et al., Nucl. Instr. and Meth. B 266 (2008) 4183.