The scintillator detector plays an important role in the detection of ray energy and arrival time.Aiming at the new domestic cerium bromide(CeBr_3)scintillator crystal,the experimental system for testing its key performance was established.A fastcoincident timing resolution measurement device was established,and it's found that the timing resolution of the new scintillator detector is 142 ps.And the results show that the decay time of the cerium bromide crystal is 16.8 ns and the rise time is 0.18 ns.The re...