Kilohertz-range compact pulsed x-ray generator having a hot-cathode diode

Teiji Oizumi; Eiichi Sato; Yoshiharu Tamakawa; Toru Yanagisawa; Akihiro Fujiwara; Kanji Mitoya

doi:10.1117/12.209667

30 May 1995 Kilohertz-range compact pulsed x-ray generator having a hot-cathode diode

Teiji Oizumi, Eiichi Sato, Yoshiharu Tamakawa, Toru Yanagisawa, Akihiro Fujiwara, Kanji Mitoya

Proceedings Volume 2513, 21st International Congress on: High-Speed Photography and Photonics; (1995) https://doi.org/10.1117/12.209667
Event: High-Speed Photography and Photonics: 21st International Congress, 1994, Taejon, Korea, Republic of

Abstract

The constructions and the fundamental studies of two types of kilohertz- range 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 a high- voltage diode in conjunction with a resistor, 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 transformer, a CD power supply for the 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 coil of the transformer. Because the high-voltage impulses 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 110 kV. The tube current was primarily determined by both the filament temperature and the tube voltage and has values of less than 1 A. The minimum widths of the pulsed x rays by the single type were less than 250 ns, and the maximum repetition rate was about 10 kHz.

Citation Download Citation

Teiji Oizumi, Eiichi Sato, Yoshiharu Tamakawa, Toru Yanagisawa, Akihiro Fujiwara, and Kanji Mitoya "Kilohertz-range compact pulsed x-ray generator having a hot-cathode diode", Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); https://doi.org/10.1117/12.209667

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KEYWORDS

X-rays

Transformers

Diodes

Radiography

Electrodes

Virtual colonoscopy

Pulse generators

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