Powder Diffractometry at the Tsukuba Photon Factory

Abstract

Powder dift"ractometry at the Photon Factory has been carried out with a diffractometer specially designed for measurements on molten salts, liquids, amorphous solids and polycrystalline materials. The main work done with the diffractometer has been structure analysis, and the study of phase transitions at high pressure and high temperature on Ge02' In 1986 a new powder diffractometer was designed and constructed. The aims of the new diffractometer are to allow easy alignment and provide sufficient accuracy for measurements taking advantage of anomalous dispersion and also to provide for energy dispersive diffractometry. The basic features are described.

Intensity enhancement in asymmetric diffraction with parallel-beam synchrotron radiation

“…Data for Si, CeO2 and ZrO 2 were collected at the Photon Factory (PF) in Tsukuba, Japan, using a similar powder diffractometer (Uno, Ozawa, Yamanaka, Morikawa, Ando, Ohsumi, Nukui, Yukino & Kawasaki, 1988) and horizontal parallel slits with the same aperture of 0.05 ° (Ohno, 1991). Two scanning modes were used for data collection: one was the symmetric 0-20 scanning and the other the asymmetric 20 scanning with an incident angle ~ fixed at 10 ° for ZrO2 and 5 and 10 °, respectively, for Si and CeO2.…”

Long Horizontal Parallel Slits with 0.03° Angular Resolution for Powder Diffraction Using Synchrotron Radiation

“…The powder diffractometer (PFPD) installed at the BL-4B experimental station at the Photon Factory (Uno et al, 1988) was used for testing the horizontal parallel slits. It is situated 20 m away from a bending-magnet light source and Table 1 Selected specifications for the horizontal parallel slits.…”