High-intensity vacuum-ultraviolet generator utilizing a surface-discharge diode

Michiaki Sagae; Eiichi Sato; Teiji Oizumi; Yasuomi Hayasi; Yoshiharu Tamakawa; Toru Yanagisawa

doi:10.1117/12.209669

30 May 1995 High-intensity vacuum-ultraviolet generator utilizing a surface-discharge diode

Michiaki Sagae, Eiichi Sato, Teiji Oizumi, Yasuomi Hayasi, Yoshiharu Tamakawa, Toru Yanagisawa

Proceedings Volume 2513, 21st International Congress on: High-Speed Photography and Photonics; (1995) https://doi.org/10.1117/12.209669
Event: High-Speed Photography and Photonics: 21st International Congress, 1994, Taejon, Korea, Republic of

Abstract

The fundamental studies on a high-intensity flash vacuum-ultraviolet (VUV) generator for producing water-window flash x rays are described. This generator consisted of the following essential components: a high- voltage power supply, a coaxial high-voltage pulser having a 0.2 (mu) F condenser, a Krytron pulser as a trigger device, a turbo molecular pump, and a VUV tube. The VUV tube employed a surface-discharge ferrite substrate having two copper electrodes and was evacuated by the pump with a pressure of 1.3 X 10^-3 Pa. The condenser in the pulser was charged from 10 to 30 kV by the power supply, and the electric charges in the condenser were discharged to the radiation tube after closing a gap switch by the Krytron pulser. Then the flash VUV rays were generated. The maximum output voltage from the pulser was almost equivalent to the charged voltage, and both the tube voltage and current displayed damped oscillations. The maximum values of the tube voltage and current were approximately 23 kV and 13 kA, respectively. Since the effective accelerating voltage was substantially decreased by the substrate, soft x rays were easily generated. The pulse durations of the VUV rays including water window x rays were nearly equivalent to those of the damped oscillations of the voltage and current, and their values were less than 30 microsecond(s) .

Citation Download Citation

Michiaki Sagae, Eiichi Sato, Teiji Oizumi, Yasuomi Hayasi, Yoshiharu Tamakawa, and Toru Yanagisawa "High-intensity vacuum-ultraviolet generator utilizing a surface-discharge diode", Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); https://doi.org/10.1117/12.209669

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KEYWORDS

Vacuum ultraviolet

X-rays

Aluminum

Electrodes

Electrons

Power supplies

Virtual colonoscopy

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