Abstract
A real-time X-ray visualization system for low X-ray absorption materials has been developed. The system is mainly composed of a multi-color scintillator based image intensifier and a real-time image-processing unit. The color image intensifier has such advantages as the high sensitivity, the wide dynamic range and the long lifetime over the conventional one. The dynamic imaging of low X-ray absorption materials was realized by the video-rate image subtraction function of the image processor. The system has been successfully applied for an observation of a carbon-particle oxidation process in supercritical water. The low X-ray absorption difference between carbon and supercritical water, surrounded by high X-ray absorption metal wall, is one of the most difficult objects to get good image. In our system, the carbon-particle image was taken at a 30 frame/sec video-rate by continuously subtracting the background image until at the instance of the carbon-particle disappearance by oxidation.
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Chikara Konagai: He received his Master degree in Nuclear Engineering in 1972 from Osaka University. He entered Toshiba Corporation in 1972. He has been working in the field of radiation detection, nuclear instrumentation and laser application in nuclear energy fields. He is a member of the Atomic Energy Society of Japan and the Laser Society of Japan.
Koichi Nittoh: He graduated from Tokai University in 1981. He started working at Nippon Atomic Industry Group (NAIG) Corporation in 1981. He has been working in Toshiba Corporation since 1989. He has been working in the fields of neutron radiography, X-ray imaging and laser isotope separation. His current interest is the application of Color Image Intensifiers into various industrial fields. He is a member of the Atomic Energy Society of Japan and Japan Radioisotope Association.
Hisao Ohmura: He received his Master degree in Fundamental Energy Science from Kyoto University in 1998. He entered Toshiba Corporation in 1998. His working area is application of supercritical water to waste decomposition process. He worked in Japan Chemical Innovation Institute (JCII) between 2000 and 2003 for the development of supercritical water based energy recovery system. He is a member of the Chemical Society of Engineers, Japan and the Atomic Energy Society of Japan.
Rie Aizawa: She graduated from Kanto Gakuin University in 1992. She entered Toshiba Corporation in 1992. She is working for the development of high temperature electro-magnetic pump. She is a member of the Atomic Energy Society of Japan.
Hiroyuki Ohta: He received his Master degree in Nuclear Engineering in 1988 from Nagoya University. He entered Toshiba Corporation in 1990. He has been working in the field of advanced reactor and hydrogen production in nuclear energy fields. He is a member of the Visualization Society of Japan and the Atomic Energy Society of Japan.
Makoto Fujie: He received his Master degree in Nuclear Engineering from Tokyo Institute of Technology in 1985. He entered Japan Atomic Energy Research Institute (JAERI) in 1985 and worked there as a researcher until 1989. He entered Nippon Atomic Industry Group (NAIG) Corporation in 1989 and he is working in Toshiba Corporation after NAIG merged into Toshiba in 1989. He was working for Japan Chemical Innovation Institute (JCII) between 2003 and 2004 on leave from Toshiba. His current development areas are Tritium production, dry reprocessing of spent nuclear fuel and organic waste processing by supercritical water. He is a member of the Chemical Society of Engineers, Japan and the Atomic Energy Society of Japan.
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Konagai, C., Nittoh, K., Ohmura, H. et al. X-ray visualization of carbon-particle oxidation process in supercritical water. J Vis 9, 403–410 (2006). https://doi.org/10.1007/BF03181779
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DOI: https://doi.org/10.1007/BF03181779