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Proceedings Paper

Intense nickel-K-photon irradiation from weakly-ionized linear plasma x-ray source with a zinc reflector
Author(s): Eiichi Sato; Yasuyuki Oda; Yuichi Sato; Hodaka Moriyama; Osahiko Hagiwara; Hiroshi Matsukiyo; Toshiyuki Enomoto; Manabu Watanabe; Shinya Kusachi
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Paper Abstract

The linear-plasma flash X-ray generator consists of a high-voltage power supply, a 200-nF high-voltage condenser, a turbomolecular pump, a trigger-pulse generator, and a demountable flash X-ray tube. In the flash X-ray generator, the condenser is charged up to 50 kV by the power supply, and flash X-rays are then produced by the vacuum discharging. The X-ray tube is a demountable triode with a rod-shaped nickel (Ni) target, a zinc (Zn) reflector and a trigger electrode, and the turbomolecular pump evacuates air from the tube at a pressure of approximately 1 mPa. The Ni-target evaporation leads to the formation of weakly ionized linear plasma, consisting of Ni ions and electrons, around the target. In the plasma, K-series characteristic X-ray photons (K photons) are produced, and bremsstrahlung photons with energies beyond the Ni-K-edge energy are absorbed by the plasma and converted into Ni-K photons. Subsequently, Zn-K photons from the Zn reflector are absorbed by the linear Ni plasma and converted into Ni-K photons. Thus, intense Ni-K photons (rays) are irradiated from the plasma axial direction by K-ray amplification by spontaneous emission of radiation (KASER).

Paper Details

Date Published: 28 January 2019
PDF: 5 pages
Proc. SPIE 11051, 32nd International Congress on High-Speed Imaging and Photonics, 110510G (28 January 2019); doi: 10.1117/12.2524627
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Yasuyuki Oda, Iwate Medical Univ. (Japan)
Yuichi Sato, Iwate Medical Univ. Hospital (Japan)
Hodaka Moriyama, Toho Univ. Ohashi Medical Ctr. (Japan)
Osahiko Hagiwara, Toho Univ. Ohashi Medical Ctr. (Japan)
Hiroshi Matsukiyo, Toho Univ. Ohashi Medical Ctr. (Japan)
Toshiyuki Enomoto, Toho Univ. Ohashi Medical Ctr. (Japan)
Manabu Watanabe, Toho Univ. Ohashi Medical Ctr. (Japan)
Shinya Kusachi, Toho Univ. Ohashi Medical Ctr. (Japan)


Published in SPIE Proceedings Vol. 11051:
32nd International Congress on High-Speed Imaging and Photonics
Michel Versluis; Eleanor Stride, Editor(s)

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