Application of harder stroboscopic x-ray generator to high-speed radiography

Haruo Obara; Masayuki Zuguchi; Eiichi Sato; Tatsumi Usuki; Koetsu Sato; Hidenori Ojima; Kazuyoshi Takayama; Yoshiharu Tamakawa

doi:10.1117/12.424299

17 April 2001 Application of harder stroboscopic x-ray generator to high-speed radiography

Haruo Obara, Masayuki Zuguchi, Eiichi Sato, Tatsumi Usuki, Koetsu Sato, Hidenori Ojima, Kazuyoshi Takayama, Yoshiharu Tamakawa

Author Affiliations +

Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424299
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan

Abstract

The radiographic characteristics and the applications of an improved high-photon-energy stroboscopic x-ray generator are described. This generator is primarily designed in order to increase the maximum photon energy of the pulse x-rays and is composed of the following essential components: a thyratron pulse generator, a high-voltage transformer having a ferrite core with a maximum output voltage of 300 kV, a sequence controller, a DC power supply for the cathode (filament), and an x-ray tube. The main condenser of about 50 nF in the thyratron pulse generator is charged up to 15 kV, and the electric charges in the condenser are discharged repetitively to the primary coil of the transformer. Because the high- voltage pulses from the secondary coil are then applied to the x-ray tube, repetitive harder x-rays are produced. The x-ray tube is of a triode having a hot-cathode that is primarily driven at the temperature-limited current region. In this triode, because the grid is connected to the cathode, this tube is driven as a diode. The tube voltage roughly increased in proportion to the charging voltage, and the maximum value was about 300 kV. Thus, the maximum photon energy had a value of about 300 keV. The tube current was primarily regulated by the filament temperature and had values of less than 2 A. The x-ray output displayed almost single pulses, and the width of the first pulse was about 300 ns. The maximum repetition rate was about 1 kHz, and the dimension of the x-ray source had values of about 3.5 X 3.5 mm. The high-speed radiography was primarily performed by both the delayed and the multiple- shot radiographies using a new computed radiography (CR) system.

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Haruo Obara, Masayuki Zuguchi, Eiichi Sato, Tatsumi Usuki, Koetsu Sato, Hidenori Ojima, Kazuyoshi Takayama, and Yoshiharu Tamakawa "Application of harder stroboscopic x-ray generator to high-speed radiography", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); https://doi.org/10.1117/12.424299

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