Self-supporting design of a time-encoded aperture, gamma-neutron imaging system

摘要

A self-supporting, 2-D, time-encoded aperture system was developed for both gamma and neutron imaging. The system achieved high sensitivity for imaging due to the use of an M-P array which has flat sidelobes of cross-correlation reconstruction and is self-supporting. It is demonstrated that a 24.4 mu Ci (137) Cs radiological point source could be detected within 10 min when the source-to-background ratio is 1:1. Several radiation scenes support that the system has an imaging capability of multipoint, extended, and gammaeutron discrimination sources. The features of good cross-correlation decoding properties, panoramic imaging, and rapid reconstruction make such a system design attractive and prospective for the localization of radioactive hot spots.