A study of the possibility of improving the time resolution of the PHOS spectrometer

摘要

Experimental investigations have shown that a timing device based on a constant-fraction discriminator is capable of providing a time resolution of approximately 0.5 ns and a timing error of approximately +/- 0.25 ns in the energy range of 0.8-1.8 GeV. In the region of "low" energies (< 0.6 GeV), the time resolution is decreased by the influence of detector noise, whose level is similar to 3-5 mV for most scintillation detectors under investigation.