Time resolution measurement of avalanche counters using digital signal processing technique

The application of digital sampling technique for extracting the timing properties of parallel-plate avalanche counter (PPAC) is described. The preamplifier output signals of two identical avalanche counters were simultaneously digitized by using a digital storage oscilloscope (sampling rate up to 10 GS/s, 8-bit resolution) and analyzed offline. The offline analysis includes signal and noise discrimination, noise filtration and determination of pulse arrival time. A time resolution better than 398 ps was obtained which matches the best literature results using analog electronics. The effect of sampling rate of signals on the achievable time resolution is studied as well. The results of the investigation lead to a simple and flexible method of data analysis in experiments dealing with avalanche counters.