Realisation of a small-size high resolution linear neutron scintillation detector

Abstract

The spectrum of position sensitive neutron scintillation detectors, which have been developed and designed in our institute during the last decade, comprises several high resolution linear detectors. The design of the small size high resolution detector is based on a modified Anger technology using a linear array of 24 HAMAMATSU type R1770 rectangular photomultipliers and a 1 mm /sup 6/Li glass scintillator. The sensitive detector area is 200/spl times/20 mm/sup 2/ and the spatial resolution is 1.2 mm. The neutron sensitivity at 1 /spl Aring/ is about 65% and the rest gamma sensitivity is less than 10/sup -4/ and the maximum count rate is about 100 kHz. The detector is linked to a highly flexible PC-based data acquisition system with 12 bit position and 16 bit time disperser. Outgoing light is redirected into the disperser by resolution. The standalone detector and data acquisition system is aimed preferably at pulsed sources performing high resolution angle-dispersive time-of-flight experiments.