Study on the effect of main performance of Si-surface-barrier detectors of different area on the noise and timing parameters of a charged particle spectrometer

Effect of main performances of Si-surface-barrier detectors on energy and time resolution of charged particle spectrometers is studied. For this purpose volt-ampere characteristics of 4.6cm2, 20.3cm2, 3cm2 detectors were measured and capacitances of P-N-junctions of detectors depending on applied voltage were determined. Effect of noises and capacitances detectors on fluctuations of time coupling to detector pulses was estimated. Measurements and calculations showed that 4.6cm2 and 3.0cm2 area detectors may be used for time-of-flight methods beginning from 5 MeV threshold and provide for 0.4-0.5 ns time coupling accuracy. 3 refs.; 5 figs.; 3 tabs