A history of basic neutron radiography research at Rikkyo University

A study of neutron imaging was initiated by a research group in our institute using the 100 kW Rikkyo TRIGA reactor, in 1984. A series of studies at the Rikkyo University was reported in the proceedings of these conferences and others and were covered mainly in the field of neutron beam qualification methods, analysis of image qualification, new imaging methods, and analysis of neutron behavior in materials. In this paper, a history of these principal studies will be summarized and a few unresolved basic studies will also be mentioned.