Concept and equipment of high resolution time-of-flight trigger

The time-of-flight trigger system for MASPIC two-arm magnet spectrometer is described. The scintillation counter signals that are timing to charged particles hitting into counter are used for selection as input signals. The concept is based on the use of the coincidence method with programmable coincidence resolving time, delays and turning of channels. The PRAVETS-16 controls the system. The particle time-of flight is fixed by timing setup with a 300 ps accuracy. The coincidence circuit resolving time range can be fixed from 1 to 15 ns with pitch ∼ 65 ps. The delays are installed with the same accuracy. The system provides the effective separation of particles that time-of-flight difference exceed 1 ns. The work time is less than 50 ns. 8 refs.; 2 figs