Improvement of Compact X-Rays Source Using Uniaxially Polarized LiNbO₃ Single Crystal

Abstract:

X-ray radiation using pyroelectric crystal is intermittent and the X-ray intensity is low and unstable compared with a conventional X-ray radiation method, such as X-ray tube. It is expected that the X-ray intensity becomes stable if electric field intensity and supply of electron are stable. In this study, to use X-ray radiation equipment as an electron source, tandem-type X-ray radiation equipment which is composed of two LiNbO3 single crystals polarized in a z-axis is proposed. When the temperature gradient for each crystal was the same, the X-ray intensity became approximately 6 times higher at a maximum. When the temperature gradient for each crystal was reversed, the period of X-ray radiation became approximately two times longer and the X-ray intensity became approximately 20 times higher at a maximum. Moreover, the stability of X-ray radiation for the repetition of temperature could be improved.

• Periodical: Key Engineering Materials (Volume 445)
• Pages: 43-46
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.445.43
• Online since: July 2010
• Authors: Yang Guan, Shinji Fukao, Kazuyuki Ito, Yoshikazu Nakanishi, Yuuki Sato, Yoshiaki Ito, Shinzo Yoshikado
• Keywords: Field-Emission Electron, LiNbO₃, Photoelectron, Pyroelectricity, Uniaxial Polarization, X-Ray Excitation

References

[1] J. D. Brownridge et al.: Trends in Lasers and Electro-Optics Research (Nova Science Publishers, New York 2006).

[2] S. Fukao et al.: Mater. Res. Soc. Proc. Vol. 1034 (2008), 1034-K11-11.

[3] S. Fukao et al.: AIP Conf. Proc. Vol. 1099 (2009), p.88.