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Proceedings Paper

Ignitron-driven soft flash x-ray generator
Author(s): Michiaki Sagae; Eiichi Sato; Toshio Ichimaru; Haruo Obara; Kimio Sakamaki; Kazuyoshi Takayama; Yoshiharu Tamakawa
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Paper Abstract

The fundamental study on a soft flash x-ray generator utilizing an ignitron is described. This generator consists of the following essential components: a high-voltage power supply, a high-voltage pulser having an ignitron, an oil diffusion pump, and a flash x-ray tube. The x-ray tube employs a molybdenum anode rod, a pipe-shaped carbon cathode, a polymethylmeth acrylate tube body, and a polyethylene terephthalate x-ray window. The space between the anode and the cathode electrodes (ac space) can be controlled by rotating the anode rod. The high-voltage condenser in the pulser is charged from 40 to 60 kV by the power supply, and the electric charges in the condenser are discharged to the tube by the ignitron through a 2.0 m coaxial cable. Because the maximum anode voltage of the ignitron is 50 kV, a free-air gap switch is employed in order to increase the high-voltage durability. In the present work, the anode electrode is connected to the ground, and the negative high-voltage output is applied to the cathode electrode. The flash x-rays are then produced. The peak cathode voltage and tube current had values of minus 56 kV and 11.5 kA, respectively, with a charging voltage of 60 kV and an ac space of 6.0 mm, and the pulse widths were less than 300 ns.

Paper Details

Date Published: 12 December 1997
PDF: 10 pages
Proc. SPIE 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, (12 December 1997); doi: 10.1117/12.294510
Show Author Affiliations
Michiaki Sagae, Iwate Medical Univ. (Japan)
Eiichi Sato, Iwate Medical Univ. (Japan)
Toshio Ichimaru, Iwate Medical Univ. (Japan)
Haruo Obara, Tohoku Univ. (Japan)
Kimio Sakamaki, Iwate Medical Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Yoshiharu Tamakawa, Iwate Medical Univ. (Japan)


Published in SPIE Proceedings Vol. 3173:
Ultrahigh- and High-Speed Photography and Image-based Motion Measurement
C. Bruce Johnson; Andrew Davidhazy; James S. Walton; Takeharu Goji Etoh; C. Bruce Johnson; Donald R. Snyder; James S. Walton, Editor(s)

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