SCINTILLATION COUNTER ARRAY LOCALIZATION SYSTEM

Abstract：

A scintillation counter array localization system, i.e, scintillation counter hodoscope, was studied and made for selecting events and triggering the streamer chamber in 1980. With this facility the penetrating position of the charged particles can be determined and it can be used as a trigger counter too. As soon as the charged particles penetrated this array and other scintillation telescope, the generated coincidence signal triggers the control system of the streamer chamber with the time delay 74 ns.On the other hand, this system also has a ability of selecting charged particle number penetrating the counter array, thus, the streamer chamber is able to record the event with certain multiplicity.This hodoscope contains a 8×8 scintillation counter array. Each plastic scintillator (type ST401) has the dimensions of 40×5×0.6 cm³ and the type of photomultipliers used is GDB50. The array area is 40×40 cm².The fast electronics and data handling system were made by ourselves. The whole system works well during the test with the on-line microcomputer TRS-80 and is not expensive.