One- and two-dimensional detector arrays were realized on 270 mum thick 10times10 mm2 CVD-diamond samples. The high resistivity value of diamond specimens in the dark allowed the realization of pixel-detectors based on a sandwich contact structure able to work in a photoconductive mode. Each pixel photocurrent was conditioned by a dedicated readout electronics composed by a high sensitive integrator and a Sigma-Delta ADC converter. The overall 500 mus conversion time afforded a data acquisition rate up to 2 kSPS. The fast photoresponse of the diamond specimen in the nanosecond time regime allowed to use the proposed device for excimer-laser beam diagnostics. Moreover, the diamond solar-blindness would guarantee high performance of devices as UV beam profile meters also under high intensity background illumination
Girolami, M., Allegrini, P., Conte, G., Salvatori, S. (2008). CVD-Diamond Detectors for Real-Time Beam Profile Measurement. IEEE SENSORS JOURNAL [10.1109/ICSENS.2008.4716433].
CVD-Diamond Detectors for Real-Time Beam Profile Measurement
M. GirolamiMembro del Collaboration Group
;P. AllegriniMembro del Collaboration Group
;G. Conte;S. Salvatori
2008-01-01
Abstract
One- and two-dimensional detector arrays were realized on 270 mum thick 10times10 mm2 CVD-diamond samples. The high resistivity value of diamond specimens in the dark allowed the realization of pixel-detectors based on a sandwich contact structure able to work in a photoconductive mode. Each pixel photocurrent was conditioned by a dedicated readout electronics composed by a high sensitive integrator and a Sigma-Delta ADC converter. The overall 500 mus conversion time afforded a data acquisition rate up to 2 kSPS. The fast photoresponse of the diamond specimen in the nanosecond time regime allowed to use the proposed device for excimer-laser beam diagnostics. Moreover, the diamond solar-blindness would guarantee high performance of devices as UV beam profile meters also under high intensity background illuminationI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
