TUCF を用いた懸垂型中性子ラジオグラフィ装置の特性

概要

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In this paper, we present a suspension-type neutron radiography instrument associated with the Californium-252 neutron irradiation facility located at Tokai University (TUCF), aiming at industrial applications. The system consists of four parts : A bridge suspending a divergent collimator, film cassette with a scintillator (enriched ^6Li-ZnS (Ag)), a stand fixing a sample on a divergent collimator and a divergent collimator. The divergent collimator can be moved on a bridge set in the holizontal position and vertically in a guide tube provided outside the collimator. The characteristics of thermal neutron beam measured several points of collimator locations in the exposure field (top of the collimator) are as follows : Thermal neutron flux density per 1μg of ^252Cf is about 2.1n/cm^2・sec to 0.92n/cm^2・sec, cadomium ratio (indium foil) about 2.6 to 3.7,and thermal neutron to γ-ray ratio about 1.6×10^4n/cm^2・mR to 1.1×10^5n/cm^2・mR. The film cassette is constructed so that in using a direct exposure method a high speed X-ray film may be placed in contact with a neutron imaging device such as NE-426 scintillator (a type of thin solid plate).
東海大学の論文