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Proceedings Paper

X-ray spectra from weakly ionized linear molybdenum plasma
Author(s): Haruo Obara; Eiichi Sato; Rudolf Germer; Etsuro Tanaka; Hidezo Mori; Toshiaki Kawai; Takashi Inoue; Akira Ogawa; Kazuyoshi Takayama
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Paper Abstract

In the plasma flash x-ray generator, a 200 nF condenser is charged up to 50 kV by a power supply, and flash x-rays are produced by the discharging. The x-ray tube is a demountable triode with a trigger electrode, and the turbomolecular pump evacuates air from the tube with a pressure of approximately 1 mPa. Target evaporation leads to the formation of weakly ionized linear plasma, consisting of molybdenum ions and electrons, around the fine target. 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 17 kA. The K-series characteristic x-rays were clean and intense, and higher harmonic x-rays were not observed. The x-ray pulse widths were approximately 600 ns, and the time-integrated x-ray intensity had a value of approximately 2.0 mGy per pulse at 1.0 m from the x-ray source with a charging voltage of 50 kV.

Paper Details

Date Published: 29 January 2007
PDF: 7 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627940 (29 January 2007); doi: 10.1117/12.725347
Show Author Affiliations
Haruo Obara, Tohoku Univ. (Japan)
Eiichi Sato, Iwate Medical Univ. (Japan)
Rudolf Germer, Technische Univ. Berlin (Germany)
Etsuro Tanaka, Tokyo Univ. of Agriculture (Japan)
Hidezo Mori, National Cardiovascular Ctr. Research Institute (Japan)
Toshiaki Kawai, Hamamatsu Photonics Inc. (Japan)
Takashi Inoue, Iwate Medical Univ. (Japan)
Akira Ogawa, Iwate Medical Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. Biomedical Engineering Research Organization (Japan)

Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

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