6 February 2004 Weakly ionized cerium plasma radiography
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In the plasma flash x-ray generator, high-voltage main condenser of about 200 nF is charged up to 55 kV by a power supply, and electric charges in the condenser are discharged to an x-ray tube after triggering the cathode electrode. The flash x-rays are then produced. The x-ray tube is of a demountable triode that is connected to a turbo molecular pump with a pressure of approximately 1 mPa. As electron flows from the cathode electrode are roughly converged to a rod cerium target of 3.0 mm in diameter by electric field in the x-ray tube, the weakly ionized linear plasma, which consists of cerium ions and electrons, forms by target evaporating. At a charging voltage of 55 kV, the maximum tube voltage was almost equal to the charging voltage of the main condenser, and the peak current was about 20 kA. When the charging voltage was increased, weakly ionized cerium plasma formed, and the K-series characteristic x-ray intensities increased. The x-ray pulse widths were about 500 ns, and the time-integrated x-ray intensity had a value of about 40 μC/kg at 1.0 m from x-ray source with a charging voltage of 55 kV. In the angiography, we employed a film-less computed radiography (CR) system and iodine-based microspheres. Because K-series characteristic x-rays are absorbed easily by the microspheres, high-contrast angiography has been performed.
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Eiichi Sato, Eiichi Sato, Yasuomi Hayasi, Yasuomi Hayasi, Rudolf Germer, Rudolf Germer, Yoshitake Koorikawa, Yoshitake Koorikawa, Kazunori Murakami, Kazunori Murakami, Etsuro Tanaka, Etsuro Tanaka, Hidezo Mori, Hidezo Mori, Toshiaki Kawai, Toshiaki Kawai, Toshio Ichimaru, Toshio Ichimaru, Fumiko Obata, Fumiko Obata, Kiyomi Takahashi, Kiyomi Takahashi, Sigehiro Sato, Sigehiro Sato, Kazuyoshi Takayama, Kazuyoshi Takayama, Hideaki Ido, Hideaki Ido, "Weakly ionized cerium plasma radiography", Proc. SPIE 5210, Ultrahigh- and High-Speed Photography, Photonics, and Videography, (6 February 2004); doi: 10.1117/12.506563; https://doi.org/10.1117/12.506563


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