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Proceedings Paper

Kilohertz-range harder pulsed x-ray generator utilizing a hot-cathode diode
Author(s): Eiichi Sato; Michiaki Sagae; Teiji Oizumi; Mariko Yamamoto; Akihito Takabe; Kimio Sakamaki; Hidenori Ojima; Kazuyoshi Takayama; Yoshiharu Tamakawa; Toru Yanagisawa
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Paper Abstract

The constructions and the fundamental studies of two types of kilohertz-range harder pulsed x- ray generators are described. The multiple-pulse generator was primarily designed in order to increase the x-ray intensities even when the x-ray duration increased. In contrast, as the damped oscillation of the tube voltage was prevented by using two high-voltage diodes, we designed the single-pulse generator to obtain short x-ray durations. Each generator employed the following essential components: a thyratron pulser, a high-voltage double transformer, a storage battery for the hot cathode (filament), and an x-ray tube. The main condenser in the pulser was charged from 8 to 16 kV, and the electric charges in the condenser were repetitively discharged to the primary coils of the transformer. Because the high-voltage impulses from the secondary coils were then applied to the x-ray tube, repetitive x rays were generated. The x-ray tube was of a diode having a hot-cathode with a maximum temperature of about 2,000 K. The tube voltage increased in proportion to the charged voltage, and the maximum value was about 170 kV. The tube current was primarily determined by both the filament temperature and the tube voltage and had values of less than 1.5 A. The maximum intensities of the multiple and single types were about 48 and 16 nC/kg at 0.5 m per pulse. The x-ray pulse widths obtained by the single generator were less than 250 ns, and the maximum repetition rate was approximately 10 kHz.

Paper Details

Date Published: 1 September 1995
PDF: 14 pages
Proc. SPIE 2549, Ultrahigh- and High-Speed Photography, Videography, and Photonics '95, (1 September 1995); doi: 10.1117/12.218308
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Michiaki Sagae, Iwate Medical Univ. (Japan)
Teiji Oizumi, Iwate Medical Univ. (Japan)
Mariko Yamamoto, Iwate Medical Univ. (Japan)
Akihito Takabe, Iwate Medical Univ. (Japan)
Kimio Sakamaki, Iwate Medical Univ. (Japan)
Hidenori Ojima, Tohoku Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Yoshiharu Tamakawa, Iwate Medical Univ. (Japan)
Toru Yanagisawa, Iwate Medical Univ. (Japan)

Published in SPIE Proceedings Vol. 2549:
Ultrahigh- and High-Speed Photography, Videography, and Photonics '95
George A. Kyrala; Donald R. Snyder, Editor(s)

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