Intense nickel-K-photon irradiation from weakly-ionized linear plasma x-ray source with a zinc reflector

Eiichi Sato; Yasuyuki Oda; Yuichi Sato; Hodaka Moriyama; Osahiko Hagiwara; Hiroshi Matsukiyo; Toshiyuki Enomoto; Manabu Watanabe; Shinya Kusachi

doi:10.1117/12.2524627

28 January 2019 Intense nickel-K-photon irradiation from weakly-ionized linear plasma x-ray source with a zinc reflector

Eiichi Sato, Yasuyuki Oda, Yuichi Sato, Hodaka Moriyama, Osahiko Hagiwara, Hiroshi Matsukiyo, Toshiyuki Enomoto, Manabu Watanabe, Shinya Kusachi

Author Affiliations +

Proceedings Volume 11051, 32nd International Congress on High-Speed Imaging and Photonics; 110510G (2019) https://doi.org/10.1117/12.2524627
Event: International Conference on High-Speed Imaging and Photonics 2018, 2018, Enschede, The Netherlands

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).

Citation Download Citation

Eiichi Sato, Yasuyuki Oda, Yuichi Sato, Hodaka Moriyama, Osahiko Hagiwara, Hiroshi Matsukiyo, Toshiyuki Enomoto, Manabu Watanabe, and Shinya Kusachi "Intense nickel-K-photon irradiation from weakly-ionized linear plasma x-ray source with a zinc reflector", Proc. SPIE 11051, 32nd International Congress on High-Speed Imaging and Photonics, 110510G (28 January 2019); https://doi.org/10.1117/12.2524627

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KEYWORDS

Photons

X-rays

Plasma

Reflectors

Zinc

Nickel

Radiography

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