Industrial Computed Tomography System with High Energy Gamma- Ray Beam

H. Toyokawa 1, H. Kanada 2, R. Kuroda 1, T. Kaihori 1, K. Yamada 1, T. Uomoto 2

1National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan,

Email: h.Toyokawa@aist.go.jp

2Institute of Industrial Science, The University of Tokyo, Tokyo, Japan

ABSTRACT

There is a strong demand for nondestructive testing (NDT) of industrial products, such as metal diecasts, sintered materials, and concrete structures with good spatial and density resolutions. A radiography system using monochromatic high-energy photons is one of the best choices. We have developed a radiography system for industrial NDT using a high-energy and quasi-monochromatic gamma-ray beam, which was produced with an electron accelerator via the laser-Compton scattering. Spatial and density resolutions of the radiography system, which were measured in high- and low-contrast resolutions, were

0.9 mm and 3%, respectively.

Keywords Radiography, CT, Gamma-ray, laser-Compton, accelerator