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Proceedings Paper

Plasma flash x-ray generator (PFXG-02)
Author(s): Eiichi Sato; Rudolf K.F. Germer; Yasuomi Hayasi; Etsuro Tanaka; Hidezo Mori; Toshiaki Kawai; Tatsumi Usuki; Koetsu Sato; Haruo Obara; Masayuki Zuguchi; Toshio Ichimaru; Hidenori Ojima; Kazuyoshi Takayama; Hideaki Ido
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Paper Abstract

In the plasma flash x-ray generator, high-voltage main condenser of about 200 nF is charged up to 50 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 iron target of 3.0 mm in diameter by electric field in the x-ray tube, the weakly ionized linear plasma, which consists of iron ions and electrons, forms by target evaporating. At a charging voltage of 50 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, the linear plasma formed, and the K-series characteristic x-ray intensities increased. The x-ray pulse widths were about 800 ns, and the time-integrated x-ray intensity had a value of about 10 μC/kg at 1.0 m from x-ray source with a charging voltage of 50 kV. The plasma x-rays were diffused after passing through two lead slits.

Paper Details

Date Published: 1 August 2003
PDF: 6 pages
Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); doi: 10.1117/12.516901
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Rudolf K.F. Germer, FHTW Berlin (Germany)
Technische Univ. Berlin (Germany)
Yasuomi Hayasi, Hachinohe National College of Technology (Japan)
Etsuro Tanaka, Tokai Univ. (Japan)
Hidezo Mori, National Cardiovascular Ctr. Research Institute (Japan)
Toshiaki Kawai, Hamamatsu Photonics K.K. (Japan)
Tatsumi Usuki, Toreck Co., Ltd. (Japan)
Koetsu Sato, Toreck Co., Ltd. (Japan)
Haruo Obara, Tohoku Univ. (Japan)
Masayuki Zuguchi, Tohoku Univ. (Japan)
Toshio Ichimaru, Hirosaki Univ. (Japan)
Hidenori Ojima, Tohoku Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Hideaki Ido, Tohoku Gakuin Univ. (Japan)

Published in SPIE Proceedings Vol. 4948:
25th International Congress on High-Speed Photography and Photonics
Claude Cavailler; Graham P. Haddleton; Manfred Hugenschmidt, Editor(s)

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