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Proceedings Paper

Flash water-window x-ray generator with a ferrite capillary
Author(s): Eiichi Sato; Michiaki Sagae; Toshio Ichimaru; Kazuyoshi Takayama; Kimio Sakamaki; Yoshiharu Tamakawa
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Paper Abstract

The fundamental study on a flash water-window x-ray generator is described. This generator is composed of a high-voltage power supply, a polarity-inversion high-voltage pulser, a krytron pulser as a trigger device, an oil-diffusion pump, and a vacuum chamber with a capillary. A combined ceramic condenser of about 5 nF in the pulser is charged up to 70 kV by the power supply, and the electric charges in the condenser are discharged to the capillary in the tube after closing a gap switch by the krytron pulser. In the present work, the chamber is evacuated by the pump with a pressure of about 1 by 10-3 Pa, and the titanium anode and cathode electrodes are employed to produce L-series characteristic x rays in the water-window range. The diameter and the length of the ferrite capillary are 2.0 and 30 mm, respectively. Both the cathode voltage and the discharge current displayed damped oscillations. The peak values of the voltage and current increased when the charging voltage was increased, and their maximum values were minus 24 kV and 2.8 kA, respectively. The pulse durations of the water-window x-rays were nearly equivalent to those of the damped oscillations of the voltage and current, and their values were less than 10 microseconds.

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: 10.1117/12.294501
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Michiaki Sagae, Iwate Medical Univ. (Japan)
Toshio Ichimaru, Iwate Medical Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Kimio Sakamaki, Iwate Medical 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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