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X-Ray Optics `Owl' and `Trinity'

2002; Institute of Physics; Volume: 41; Issue: Part 1, No. 7A Linguagem: Inglês

10.1143/jjap.41.4742

1347-4065

Masami Ando, Kazuyuki Hyodo, Hiroshi Sugiyama, Anton Maksimenko, Wanwisa Pattanasiriwisawa, Koichi Mori, Joseph Roberson, Edward Rubenstein, Yoshihisa Tanaka, Junyuan Chen, Dingchang Xian, textscZhang Xiaowei,

Advanced X-ray and CT Imaging

We report an X-ray optical system `Owl', capable of dark-field imaging. It comprises a Bragg case asymmetric monochromator and a monolithic X-ray optics housing a collimator C and an analyzer A that can select only the refracted light by 4,4,0 diffraction and crystals C and A of 1.08 mm thickness. The angular width of diffraction is 0.3 µrad at an X-ray energy of 35 keV. It has been proven that one can obtain the dark-field image corresponding to a forward diffraction beam as well as the bright-field image corresponding to a diffraction beam or vice versa depending on the specified thickness of the analyzer. Images due to refraction contrast in the dark-field imaging are clearly shown. In this paper, design and test of this X-ray optics and its preliminary applications are described in detail. Also another X-ray optics `Trinity', which is capable of viewing three types of contrast, namely, refraction, phase interference and absorption, has been implemented.